Asus P8B75 M LX User Manual

P8B75-M LX  
Contents  
iii  
Contents  
1.13.3 Intel® SBA support......................................................... 1-33  
iv  
Contents  
v
Safety information  
Electrical safety  
To prevent electric shock hazard, disconnect the power cable from the electric outlet  
before relocating the system.  
When adding or removing devices to or from the system, ensure that the power cables  
for the devices are unplugged before the signal cables are connected. If possible,  
disconnect all power cables from the existing system before you add a device.  
Before connecting or removing signal cables from the motherboard, ensure that all  
power cables are unplugged.  
Seek professional assistance before using an adapter or extension cord. These devices  
could interrupt the grounding circuit.  
Ensure that your power supply is set to the correct voltage in your area. If you are not  
sure about the voltage of the electrical outlet you are using, contact your local power  
company.  
If the power supply is broken, do not try to fix it by yourself. Contact a qualified service  
technician or your retailer.  
Operation safety  
Before installing the motherboard and adding devices on it, carefully read all the manuals  
that came with the package.  
Before using the product, ensure that all cables are correctly connected and the power  
cables are not damaged. If you detect any damage, contact your dealer immediately.  
To avoid short circuits, keep paper clips, screws, and staples away from connectors,  
slots, sockets and circuitry.  
Avoid dust, humidity, and temperature extremes. Do not place the product in any area  
where it may become wet.  
Place the product on a stable surface.  
If you encounter technical problems with the product, contact a qualified service  
technician or your retailer.  
About this guide  
This user guide contains the information you need when installing and configuring the  
motherboard.  
How this guide is organized  
This guide contains the following parts:  
Chapter 1: Product introduction  
This chapter describes the features of the motherboard and the new technology it  
supports.  
Chapter 2: BIOS information  
This chapter tells how to change system settings through the BIOS Setup menus.  
Detailed descriptions of the BIOS parameters are also provided.  
vi  
 
Conventions used in this guide  
To ensure that you perform certain tasks properly, take note of the following symbols used  
throughout this manual.  
DANGER/WARNING: Information to prevent injury to yourself when trying to  
complete a task.  
CAUTION: Information to prevent damage to the components when trying to  
complete a task.  
IMPORTANT: Instructions that you MUST follow to complete a task.  
NOTE: Tips and additional information to help you complete a task.  
Where to find more information  
Refer to the following sources for additional information and for product and software  
updates.  
1.  
ASUS websites  
The ASUS website provides updated information on ASUS hardware and software  
products. Refer to the ASUS contact information.  
2.  
Optional documentation  
Your product package may include optional documentation, such as warranty flyers,  
that may have been added by your dealer. These documents are not part of the  
standard package.  
Typography  
Bold text  
Italics  
Indicates a menu or an item to select.  
Used to emphasize a word or a phrase.  
<Key>  
Keys enclosed in the less-than and greater-than sign means  
that you must press the enclosed key.  
Example: <Enter> means that you must press the Enter or  
Return key.  
<Key1>+<Key2>+<Key3>  
If you must press two or more keys simultaneously, the key  
names are linked with a plus sign (+).  
Example: <Ctrl>+<Alt>+<D>  
vii  
P8B75-M LX specifications summary  
CPU  
LGA1155 socket for Intel® 2nd / 3rd Generation Core™ i7 /  
Core™ i5 / Core™ i3 processors  
Supports Intel 22/32nm CPU  
Supports Intel® Turbo Boost Technology 2.0  
* The Intel® Turbo Boost Technology 2.0 support depends on the  
CPU types.  
** Refer to www.asus.com for Intel® CPU support list.  
Chipset  
Memory  
Intel® B75 Express Chipset  
2 x DIMM, max. 16GB*, DDR3 2200(O.C.) / 2133(O.C.) / 2000(O.  
C.) /1800(O.C.) / 1600 / 1333 / 1066 MHz, non-ECC,  
un-buffered memory  
Dual-channel memory architecture  
*
1600MHz and higher frequency is supported by Intel® 3rd  
generation processors.  
Vendors List).  
*** When you install a total memory of 4GB capacity or more,  
Windows® 32-bit operating system may only recognize less  
than 3GB. We recommend a maximum of 3GB system memory  
if you are using a Windows® 32-bit operating system.  
Graphics  
Integrated graphics processor  
Multi-VGA output support: DVI-D and D-Sub ports  
Supports DVI-D with max.resolution of 1920 x 1200 @60Hz  
Supports D-Sub with max. resolution of 2048 x 1536 @75Hz  
Maximum shared memory of 1 GB  
Expansion slots  
Storage  
1 x PCI Express 3.0/2.0 x16 slot  
2 x PCI Express 2.0 x1 slots  
1 x PCI slot  
Intel® B75 Express Chipset:  
-
-
5 x Serial ATA 3.0 Gb/s connectors (blue)  
1 x Serial ATA 6.0 Gb/s connector (gray)  
Realtek® 8111F-VB-CG PCIe Gigabit LAN controller  
LAN  
Audio  
VIA® VT1708S 8-channel* High Definition Audio CODEC  
-
Supports jack-detection, multi-streaming, anti-pop function, and  
front panel jack-retasking  
* Use a chassis with HD audio module in the front panel to support  
an 8-channel audio output.  
USB  
Intel® B75 Express Chipset:  
-
4 x USB 3.0/2.0 ports (2 ports at midboard, 2 ports at back  
panel)  
-
8 x USB 2.0/1.1 ports (4 ports at midboard, 4 ports at back  
panel)  
(continued on the next page)  
viii  
 
P8B75-M LX specifications summary  
ASUS unique features ASUS Exclusive Features:  
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-
-
-
-
-
-
-
ASUS GPU Boost  
ASUS USB 3.0 Boost  
LucidLogix® Virtu MVP  
Network iControl  
ASUS AI Suite II  
Ai Charger  
ASUS Anti-Surge Protection  
ASUS UEFI BIOS featuring graphics user interface  
ASUS Quiet Thermal Solution:  
ASUS Fan Xpert  
ASUS EZ DIY:  
-
-
-
-
ASUS CrashFree BIOS 3  
ASUS EZ Flash 2  
ASUS MyLogo 2™  
Rear panel I/O ports  
1 x PS/2 keyboard/mouse combo port (purple/green)  
1 x DVI-D port  
1 x D-Sub port  
1 x LAN (RJ-45) port  
4 x USB 2.0/1.1 ports  
2 x USB 3.0/2.0 ports (blue)  
3 x Audio jacks  
Internal connectors/  
switches/ buttons  
1 x USB 3.0 connector supports additional 2 USB 3.0 ports  
2 x USB 2.0 connectors support additional 4 USB 2.0 ports  
5 x SATA 3.0 Gb/s connectors (blue)  
1 x SATA 6.0 Gb/s connector (gray)  
1 x CPU fan connector  
1 x Chassis fan connectors  
1 x COM connector  
1 x LPT connector  
1 x Front panel audio connector (AAFP)  
1 x S/PDIF output connector  
1 x System panel connector  
1 x Speaker connector  
1 x 24-pin ATX power connector  
1 x 4-pin ATX 12V power connector  
1 x chassis intrusion connector  
1 x CLRTC connector  
(continued on the next page)  
ix  
P8B75-M LX specifications summary  
BIOS features  
128 Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS  
2.5, ACPI 2.0a, Multi-language BIOS, ASUS EZ Flash 2, ASUS  
CrashFree BIOS 3  
Manageability  
Accessories  
WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE  
1 x Serial ATA 3.0Gb/s cable  
1 x Serial ATA 6.0Gb/s cable  
1 x I/O shield  
1 x User Manual  
1 x Support DVD  
Support DVD  
Form factor  
Drivers  
ASUS utilities  
ASUS Update  
Anti-virus software (OEM version)  
MicroATX form factor: 9.6”x 7.8” (24.4cm x 19.8cm)  
* Specifications are subject to change without notice.  
x
Chapter 1  
Product introduction  
1.1  
Welcome!  
Thank you for buying an ASUS® P8B75-M LX motherboard!  
The motherboard delivers a host of new features and latest technologies, making it another  
standout in the long line of ASUS quality motherboards!  
Before you start installing the motherboard, and hardware devices on it, check the items in  
your package with the list below.  
1.2  
Package contents  
Check your motherboard package for the following items.  
Motherboard  
Cables  
ASUS P8B75-M LX motherboard  
1 x Serial ATA 6.0Gb/s cable  
1 x Serial ATA 3.0Gb/s cable  
Accessories  
1 x I/O shield  
Application DVD  
Documentation  
ASUS motherboard support DVD  
User Manual  
If any of the above items is damaged or missing, contact your retailer.  
1.3  
Special features  
1.3.1  
Product highlights  
LGA1155 socket for Intel® 3rd/2nd Generation Core™ i7 /  
Core™ i5 / Core™ i3 processors  
This motherboard supports the Intel® 3rd/2nd generation Core™ i7 /  
Core™ i5 / Core™ i3 processors in the LGA1155 package, with memory  
and PCI Express controllers integrated to support dual-channel (4  
DIMMs) DDR3 memory and 16 PCI Express 3.0 lanes. This provides  
great graphics performance. Intel® 3rd/2nd generation Core™ i7 / Core™  
i5 / Core™ i3 processors are among the most powerful and energy  
efficient CPUs in the world.  
ASUS P8B75-M LX  
1-1  
 
Intel® B75 Express Chipset  
The Intel® B75 Express Chipset is the latest single-chipset designed to  
support the 1155 socket Intel® 3rd/2nd generation Core™ i7 / Core™ i5 /  
Core™ i3 processors. It provides improved performance by utilizing serial  
point-to-point links, allowing increased bandwidth and stability. In addition,  
B75 chipset provides 4 USB 3.0 ports that retrieves data 10 times faster.  
Moreover, Intel® B75 Express Chipset also supports iGPU function, letting  
users enjoy the latest Intel integrated graphic performance.  
Dual-Channel DDR3 2400(O.C.) / 2250(O.C.) / 2200(OC.) /  
2133(O.C.) / 2000 / 1866 /1600 / 1333 / 1066MHz support  
The motherboard supports DDR3 memory that features data transfer  
rates of 2400(O.C.) / 2250(O.C.) / 2200(OC.) / 2133(O.C.) / 2000 / 1866  
/1600 / 1333 / 1066 MHz to meet the higher bandwidth requirements  
of the latest 3D graphics, multimedia, and Internet applications. The  
dual-channel DDR3 architecture enlarges the bandwidth of your system  
memory to boost system performance.  
* Due to the behavior of Intel® 3rd Generation processor, DDR3 2250 (and  
above)/2133/1866 MHz memory module will run at DDR3 2200/2000/1800 MHz  
frequency as default.  
Native SATA 6.0 Gb/s support  
The Intel® B75 Express Chipset natively supports next-generation Serial  
ATA (SATA) storage interface. This motherboard delivers up to 6.0 Gb/s  
data transfer rates. Additionally, get enhanced scalability, faster data  
retrieval, double the bandwidth of current bus systems.  
Complete USB 3.0 Integration  
ASUS facilitates strategic USB 3.0 accessibility for both the front and  
rear panel – 4 USB 3.0 ports in total. Experience the latest plug &  
play connectivity at speeds up to 10 times faster than USB 2.0. This  
motherboard affords greater convenience to high speed connectivity.  
PCI Express® 3.0  
PCI Express® 3.0 (PCIe 3.0) is the latest PCI Express bus standard with  
improved encoding schemes that provide twice the performance of the  
current PCIe 2.0. The total bandwidth for a x16 link reaches a maximum  
of 32Gb/s, double the 16 Gb/s of PCIe 2.0 (in x16 mode). As such, PCIe  
3.0 provides users an unprecendented data speeds, combined with the  
convenience and seamless transition offerred by complete backward  
compatibility with PCIe 1.0 and PCIe 2.0 devices. PCIe 3.0 will become  
a must-have feature for users who wish to improve and optimize graphic  
performance, as well as have the latest technology available to them.  
* PCI 3.0 speed is supported by Intel® 3rd generation Core™ processors.  
1-2  
Chapter 1: Product introduction  
1.3.2  
Innovative ASUS features  
ASUS UEFI BIOS  
Flexible and Easy BIOS Interface  
ASUS UEFI BIOS offers the first mouse-controlled graphical BIOS  
designed with selectable modes, providing a user-friendly interface  
that goes beyond the traditional keyboard-only controls. It also natively  
supports fully-utilized hard drives larger than 2.2TB in 64-bit operating  
systems.  
ASUS exclusive interface  
EZ Mode displays frequently-accessed info. Users can choose system  
performance settings, and drag and drop boot priorities. Advanced Mode  
for performance enthusiasts includes detailed DRAM settings via a  
dedicated memory info page for complete insight.  
New upgrade! Quick and easy information for enhanced system  
control  
- F12 BIOS snapshot hotkey for sharing UEFI information and  
troubleshooting  
- New F3 Shortcut for most accessed information  
- ASUS DRAM SPD (Serial Presence Detect) information for accessing  
memory information, detecting faulty DIMMs, and helping with difficult  
POST situations.  
LucidLogix Virtu MVP  
LucidLogix Virtu MVP featuring HyperFormance™ Technology boosts  
your discrete graphics card up to 60% beyond its original performance.  
Designed for Intel® processor graphics and Windows® 7 PCs, it perfectly  
combines the performance of discrete graphic cards with fast computing  
iGPU. Also, with newly designed Virtual Sync, users can enjoy a  
smoother gaming experience by eliminating tearing artifacts. LucidLogix  
Virtu MVP can also dynamically assigns tasks to the best available  
graphics resource, based on power, performance, and system load.  
This allows users to fully utilize 3x faster video conversion with Intel®  
Quick Sync Video technology while retaining high-end 3D rendering and  
gaming performance, provided by both NVIDIA and AMD graphic cards.  
When the discrete graphic card is not required, power consumption  
goes automatically down to near zero, making the system more  
environmentally-friendly. For users searching for perfection, LucidLogix  
Virtu MVP provides great graphical performance, and the best flexibility  
and efficiency.  
* LucidLogix Virtu MVP supports Windows® operating system.  
** Intel® Quick Sync Video feature is supported by 3rd/2nd generation Intel®  
Core™ processor family  
ASUS P8B75-M LX  
1-3  
 
USB 3.0 Boost  
With USB 3.0 Boost technology, a USB device’s transmission speed is  
significantly increased, adding to an already impressive fast USB 3.0  
transfer speed. ASUS software automatically accelerates data speeds for  
compatible USB 3.0 peripherals without the need for any user interaction.  
GPU Boost  
Go to the Limit with iGPU Level Up!  
GPU Boost accelerates the integrated GPU for extreme graphics  
performance. The user-friendly interface facilitates flexible frequency  
adjustments. It easily delivers stable system-level upgrades for every use.  
AI Suite II  
With its fast user-friendly interface, ASUS AI Suite II consolidates all the  
exclusive ASUS features into one simple to use software package. It  
allows you to supervise overclocking, energy management, fan speed  
control, and voltage and sensor readings. This all-in-one software offers  
diverse and ease to use functions, with no need to switch back and forth  
between different utilities.  
ASUS Anti-Surge Protection  
This special design prevents expensive devices and the motherboard  
from damage caused by power surges from switching power supply  
(PSU).  
Network iControl  
With a one-click on/off button, the software currently in use is set as  
top priority over all other network programs, dominating the network  
bandwidth with ease. Moreover, you can prioritize your favorite software  
easily by configuring profiles through the intutive user interface. Within  
the profile, programs can be pre-scheduled to run in a specific time period  
to avoid network clogging and long-waits on downloads. Auto PPPoE  
network connection gives a one-step setup and an intuitive network  
bandwidth control center.  
ASUS Fan Xpert  
ASUS Fan Xpert intelligently allows you to adjust the CPU fan and  
chassis fan speeds according to different ambient temperatures caused  
by different climate conditions in different geographic regions and your  
PC’s loading. The built-in variety of useful profiles offer flexible controls of  
fan speed to achieve a quiet and cool environment.  
Ai Charger  
Ai Charger is ASUS fast-charging software that supports iPod, iPhone,  
and iPad.  
Check your USB mobile device if it fully supports the BC 1.1 function.  
The actual charging speed may vary with your USB device’s conditions.  
1-4  
Chapter 1: Product introduction  
ASUS MyLogo2™  
This feature allows you to convert your favorite photo into a 256-color  
boot logo for a more colorful and vivid image on your screen.  
ASUS CrashFree BIOS 3  
ASUS CrashFree BIOS 3 is an auto-recovery tool that allows you to  
restore a corrupted BIOS file using the bundled support DVD or USB  
flash disk that contains the latest BIOS file.  
ASUS EZ Flash 2  
ASUS EZ Flash 2 is a utility that allows you to update the BIOS without  
using an OS-based utility.  
C.P.R. (CPU Parameter Recall)  
The BIOS C.P.R. feature automatically restores the CPU default settings  
when the system hangs due to overclocking failure. C.P.R. eliminates the  
need to open the system chassis and clear the RTC data. Simply shut  
down and reboot the system, and the BIOS automatically restores the  
CPU parameters to their default settings.  
ErP ready  
The motherboard is European Union´s Energy-related Products (ErP)  
ready, and ErP requires products to meet certain energy efficiency  
requirements in regards to energy consumptions. This is in line with  
ASUS vision of creating environment-friendly and energy-efficient  
products through product design and innovation to reduce carbon  
footprint of the product and thus mitigate environmental impacts.  
1.4  
Before you proceed  
Take note of the following precautions before you install motherboard components or change  
any motherboard settings.  
Unplug the power cord from the wall socket before touching any component.  
Before handling components, use a grounded wrist strap or touch a safely grounded  
object or a metal object, such as the power supply case, to avoid damaging them due to  
static electricity.  
Hold components by the edges to avoid touching the ICs on them.  
Whenever you uninstall any component, place it on a grounded antistatic pad or in the  
bag that came with the component.  
Before you install or remove any component, ensure that the ATX power supply is  
switched off or the power cord is detached from the power supply. Failure to do so may  
cause severe damage to the motherboard, peripherals, or components.  
ASUS P8B75-M LX  
1-5  
 
1.5  
Motherboard overview  
Before you install the motherboard, study the configuration of your chassis to ensure that the  
motherboard fits into it.  
Ensure that you unplug the power cord before installing or removing the motherboard.  
Failure to do so can cause you physical injury and damage motherboard components.  
1.5.1  
Placement direction  
When installing the motherboard, ensure that you place it into the chassis in the correct  
orientation. The edge with external ports goes to the rear part of the chassis as indicated in  
the image below.  
1.5.2  
Screw holes  
Place six screws into the holes indicated by circles to secure the motherboard to the chassis.  
Do not overtighten the screws! Doing so can damage the motherboard.  
Place this side towards  
the rear of the chassis  
P8B75-M LX  
1-6  
Chapter 1: Product introduction  
 
1.5.3  
Motherboard layout  
1
2
3
1
4
19.8cm(7.8in)  
KBMS_USB34  
CPU_FAN  
ATX12V  
2
USB3_12  
LAN_USB12  
AUDIO  
CHA_FAN  
RTL  
8111F  
Lithium Cell  
CMOS Power  
5
6
PCIEX16_1  
SATA3G_1  
SATA3G_2  
P8B75-M LX  
PCIEX1_1  
Super  
I/O  
Intel®  
B75  
8Mb  
BIOS  
CLRTC  
PCIEX1_2  
8Mb  
BIOS  
CHASSIS  
PCI1  
SATA3G_4 SATA3G_3  
SATA3G_5 SATA6G_1  
VIA  
VT1708S  
SPDIF_OUT  
SB_PWR  
COM1  
USB78  
USB56  
LPT  
AAFP  
SPEAKER  
F_PANEL  
17  
16  
15 14  
13  
12  
11  
10  
9
8
6
7
1.5.4  
Layout contents  
Connectors/Jumpers/Slots/LED  
Page  
Connectors/Jumpers/Slots/LED  
Page  
1.  
2.  
3.  
CPU and chassis fan connectors (4-pin  
CPU_FAN, 3-pin CHA_FAN)  
1-27  
10. Clear RTC RAM (3-pin CLRTC)  
1-22  
ATX power connectors (24-pin EATXPWR,  
4-pin ATX12V)  
1-26  
1-8  
11. USB 2.0 connectors (10-1 pin USB56,  
USB78)  
1-30  
1-31  
1-27  
Intel® LGA1155 CPU socket  
12. Onboard LED (SB_PWR)  
4.  
5.  
6.  
DDR3 DIMM slots  
1-13  
1-30  
1-29  
13. LPT connector (26-1 pin LPT)  
USB 3.0 connector (20-1 pin USB3_34)  
14 Digital audio connector (4-1 pin SPDIF_OUT) 1-25  
15. Serial port connector (10-1 pin COM1) 1-26  
Intel® B75 Serial ATA 3.0Gb/s connectors  
(7-pin SATA3G_1~5 [blue])  
7.  
8.  
9.  
Intel® B75 Serial ATA 6.0Gb/s connectors  
(7-pin SATA6G_1 [gray])  
1-29  
16. Front panel audio connector (10-1 pin AAFP) 1-25  
System panel connector (10-1 pin F_PANEL) 1-28  
17. Chassis intrusion connector (4-1 pin  
CHASSIS)  
1-31  
Speaker connector (4-pin SPEAKER)  
1-28  
ASUS P8B75-M LX  
1-7  
 
1.6  
Central Processing Unit (CPU)  
The motherboard comes with a surface mount LGA1155 socket designed for the Intel®  
3rd/2nd generation Core™ i7 / Core™ i5 / Core™ i3 processors.  
P8B75-M LX  
P8B75-M LX CPU socket LGA1155  
Unplug all power cables before installing the CPU.  
Upon purchase of the motherboard, ensure that the PnP cap is on the socket and the  
socket contacts are not bent. Contact your retailer immediately if the PnP cap is missing,  
or if you see any damage to the PnP cap/socket contacts/motherboard components.  
ASUS will shoulder the cost of repair only if the damage is shipment/transit-related.  
Keep the cap after installing the motherboard. ASUS will process Return Merchandise  
Authorization (RMA) requests only if the motherboard comes with the cap on the  
LGA1155 socket.  
The product warranty does not cover damage to the socket contacts resulting from  
incorrect CPU installation/removal, or misplacement/loss/incorrect removal of the PnP  
cap.  
1-8  
Chapter 1: Product introduction  
 
1.6.1  
Installing the CPU  
The LGA1156 CPU is incompatible with the LGA1155 socket. DO NOT install a LGA1156  
CPU on the LGA1155 socket.  
1
A
B
3
2
ASUS P8B75-M LX  
1-9  
 
4
C
A
B
5
1-10  
Chapter 1: Product introduction  
1.6.2  
CPU heatsink and fan assembly installation  
Apply the Thermal Interface Material  
to the CPU heatsink and CPU  
before you install the heatsink and  
fan if necessary.  
To install the CPU heatsink and fan assembly  
A
1
2
B
B
A
3
4
ASUS P8B75-M LX  
1-11  
 
To uninstall the CPU heatsink and fan assembly  
1
2
A
B
B
A
1-12  
Chapter 1: Product introduction  
1.7  
System memory  
1.7.1  
Overview  
The motherboard comes with four Double Data Rate 3 (DDR3) Dual Inline Memory Modules  
(DIMM) sockets. A DDR3 module has the same physical dimensions as a DDR2 DIMM but  
is notched differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are  
developed for better performance with less power consumption.  
The figure illustrates the location of the DDR3 DIMM sockets:  
Channel  
Sockets  
Channel A  
Channel B  
DIMM_A1  
DIMM_B1  
P8B75-M LX  
P8B75-M LX 240-pin DDR3 DIMM sockets  
1.7.2  
Memory configurations  
You may install 1GB, 2GB, 4GB and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM  
sockets.  
You may install varying memory sizes in Channel A and Channel B. The system maps  
the total size of the lower-sized channel for the dual-channel configuration. Any excess  
memory from the higher-sized channel is then mapped for single-channel operation.  
Due to Intel® 3rd generation processors' behavior, DDR3 2250 (and above)/2133/1866  
MHz memory module will run at DDR3 2200/2000/1800 MHz frequency as default.  
Always install DIMMs with the same CAS latency. For optimum compatibility, we  
recommend that you obtain memory modules from the same vendor.  
Due to the memory address limitation on 32-bit Windows® OS, when you install 4GB  
or more memory on the motherboard, the actual usable memory for the OS can be  
about 3GB or less. For effective use of memory, we recommend that you do any of the  
following:  
- Use a maximum of 3GB system memory if you are using a 32-bit Windows® OS.  
- Install a 64-bit Windows® OS when you want to install 4GB or more on the  
motherboard.  
This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.  
The default memory operation frequency is dependent on its Serial Presence Detect  
(SPD), which is the standard way of accessing information from a memory module.  
Under the default state, some memory modules for overclocking may operate at a  
lower frequency than the vendor-marked value. To operate at the vendor-marked or at a  
higher frequency, refer to section 2.4 Ai Tweaker menu for manual memory frequency  
adjustment.  
For system stability, use a more efficient memory cooling system to support a full  
memory load (2 DIMMs) or overclocking condition.  
ASUS P8B75-M LX  
1-13  
 
P8B75-M LX Motherboard Qualified Vendors Lists (QVL)  
DDR3-2400 MHz capability  
DIMM socket support  
(Optional)  
SS/ Chip  
DS Brand  
Vendors  
Part No.  
CMGTX8(XMP)  
Size  
Chip NO.  
Timing  
Voltage  
1 DIMM  
2 DIMMs  
CORSAIR  
G.SKILL  
8GB(2GBx 4) SS  
16GB(4GB x4) DS  
-
-
-
-
10-12-10-27 1.65V  
11-11-11-31 1.65V  
F3-19200CL11Q-  
16GBZHD(XMP1.3)  
F3-19200CL9D-  
4GBPIS(XMP)  
G.SKILL  
GEIL  
4GB(2x 2GB) DS  
-
-
-
-
-
-
9-11-9-28  
9-11-9-27  
1.65V  
1.65V  
GET34GB2400C9DC(XMP) 2GB  
DS  
SS  
FLLE88F-C8KKAA  
2GB  
KINGMAX  
10-11-10-30 1.8V  
HAIS(XMP)  
TX2400KLU-  
4GK(427652)(XMP)  
Transcend  
Transcend  
Transcend  
4GB(2 x 2GB) SS  
4GB(2x 2GB) SS  
4GB(2x 2GB) DS  
-
-
-
-
-
-
-
1.65V  
1.65V  
1.65V  
TX2400KLU-4GK  
(381850)(XMP)  
9
9
TX2400KLU-  
4GK(374243)(XMP)  
DDR3-2250 MHz capability  
DIMM socket support  
(Optional)  
Chip  
Brand  
Vendors  
Part No.  
Size  
SS/DS  
Chip NO.  
Timing  
Voltage  
1 DIMM  
2 DIMMs  
KINGSTON KHX2250C9D3T1K2/4GX(XMP) 4GB(2 x 2GB) DS  
-
-
-
1.65V  
DDR3-2200 MHz capability  
DIMM socket support  
(Optional)  
Chip  
Brand  
Vendors  
Part No.  
Size  
SS/DS  
Chip NO.  
Timing  
8-8-8-24  
Voltage  
1 DIMM  
2 DIMMs  
G.SKILL  
GEIL  
F3-17600CL8D-4GBPS(XMP)  
GET34GB2200C9DC(XMP)  
GET38GB2200C9ADC(XMP)  
4GB(2 x 2GB) DS  
-
-
-
-
-
-
-
1.65V  
2GB  
4GB  
DS  
DS  
DS  
-
-
-
-
-
9-10-9-28 1.65V  
9-11-9-28 1.65V  
GEIL  
KINGMAX FLKE85F-B8KJAA-FEIS(XMP) 2GB  
-
-
-
-
KINGMAX FLKE85F-B8KHA EEIH(XMP)  
KINGMAX FLKE85F-B8KJA FEIH(XMP)  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
1.5V-1.7V  
1.5V-1.7V  
DDR3-2133 MHz capability  
DIMM socket support  
(Optional)  
SS/ Chip Chip  
DS Brand NO.  
Vendors  
Part No.  
Size  
Timing  
Voltage  
1 DIMM  
2 DIMMs  
A-DATA  
CORSAIR  
CORSAIR  
G.SKILL  
GEIL  
AX3U2133GC2G9B-DG2(XMP)  
CMT4GX3M2A2133C9(XMP)  
CMT4GX3M2B2133C9(XMP)  
2GB  
SS  
DS  
DS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
9-11-9-27 1.55~1.75V  
9-10-9-24 1.65V  
9-10-9-27 1.50V  
9-11-10-28 1.65V  
4GB(2x 2GB)  
4GB(2x 2GB)  
F3-17000CL9Q-16GBZH(XMP1.3) 16GB ( 4GB x4 ) DS  
GE34GB2133C9DC(XMP)  
GU34GB2133C9DC(XMP)  
2GB  
DS  
DS  
9-9-9-28  
1.65V  
1.65V  
1.65V  
1.65V  
GEIL  
4GB(2 x 2GB)  
9-9-9-28  
KINGSTON KHX2133C9AD3T1K2/4GX(XMP) 4GB ( 2x 2GB ) DS  
KINGSTON KHX2133C9AD3W1K2/4GX(XMP) 4GB ( 2x 2GB ) DS  
-
-
KINGSTON KHX2133C9AD3X2K2/4GX(XMP) 4GB(2 x 2GB)  
KINGSTON KHX2133C9AD3T1K4/8GX(XMP) 8GB(4 x 2GB)  
KHX2133C9AD3T1FK4/  
DS  
DS  
9-11-9-27 1.65V  
9-11-9-27 1.65V  
KINGSTON  
8GB(4x 2GB)  
DS  
-
-
-
1.65V  
8GX(XMP)  
1-14  
Chapter 1: Product introduction  
DDR3-2000 MHz capability  
DIMM socket  
support (Optional)  
Chip  
Brand  
Chip  
NO.  
Vendors  
Apacer  
Part No.  
Size  
SS/DS  
Timing  
Voltage  
1 DIMM 2 DIMMs  
78.AAGD5.9KD(XMP)  
6GB(3 x 2GB) DS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
9-9-9-27  
1.65V  
CORSAIR  
CORSAIR  
G.SKILL  
G.SKILL  
G.SKILL  
GEIL  
CMZ4GX3M2A2000C10(XMP) 4GB(2 x 2GB) SS  
CMT6GX3M3A2000C8(XMP) 6GB(3 x 2GB) DS  
10-10-10-27 1.50V  
8-9-8-24  
9-9-9-24  
9-9-9-27  
6-9-6-24  
9-9-9-28  
1.65V  
1.65V  
1.65V  
1.65V  
1.65V  
F3-16000CL9D-4GBFLS(XMP) 4GB(2 x 2GB) DS  
F3-16000CL9D-4GBTD(XMP) 4GB(2 x 2GB) DS  
F3-16000CL6T-6GBPIS(XMP) 6GB (3x 2GB ) DS  
GUP34GB2000C9DC(XMP)  
4GB(2 x 2GB) DS  
KHX2000C9AD3T1K2/  
4GX(XMP)  
KINGSTON  
KINGSTON  
KINGSTON  
KINGSTON  
4GB ( 2x 2GB ) DS  
-
-
-
-
-
-
-
-
-
1.65V  
1.65V  
1.65V  
1.65V  
KHX2000C9AD3W1K2/  
4GX(XMP)  
4GB ( 2x 2GB ) DS  
4GB(2 x 2GB) DS  
6GB ( 3x 2GB ) DS  
-
KHX2000C9AD3T1K2/  
4GX(XMP)  
9
-
KHX2000C9AD3W1K3/  
6GX(XMP)  
KHX2000C9AD3T1K3/  
6GX(XMP)  
KINGSTON  
Transcend  
6GB (3x 2GB ) DS  
8GB(2 x 4GB) DS  
-
-
-
-
-
-
1.65V  
1.6V  
TX2000KLN-8GK(XMP)  
DDR3-1866 MHz capability  
DIMM socket  
support (Optional)  
Chip  
Brand NO.  
Chip  
Vendors  
Part No.  
Size  
SS/DS  
Timing  
Voltage  
1 DIMM 2 DIMM  
AX3U1866PB2G8-  
DP2(XMP)  
A-DATA  
2GB  
DS  
-
-
8-8-8-24  
1.55V-1.75V  
CORSAIR  
CORSAIR  
CORSAIR  
CMT4GX3M2A1866C9(XMP) 4GB(2 x 2GB)  
CMT6GX3MA1866C9(XMP) 6GB(3 x 2GB)  
CMZ8GX3M2A1866C9(XMP) 8GB(2 x 4GB)  
F3-14900CL9Q-  
DS  
DS  
DS  
-
-
-
-
-
-
9-9-9-24  
9-9-9-24  
9-10-9-27  
1.65V  
1.65V  
1.50V  
G.SKILL  
16GB(4 x 4GB) DS  
64GB(8 x 8GB) DS  
-
-
-
-
-
-
-
-
-
-
9-10-9-28  
1.5V  
16GBZL(XMP1.3)  
F3-14900CL10Q2-  
64GBZLD(XMP1.3)  
G.SKILL  
10-11-10-30 1.5V  
F3-14900CL9Q-  
8GBXL(XMP)  
G.SKILL  
8GB(4 x 2GB)  
3GB(3 x 1GB)  
DS  
SS  
9-9-9-24  
1.6V  
KHX1866C9D3T1K3/  
3GX(XMP)  
KINGSTON  
KINGSTON  
KINGSTON  
-
-
1.65V  
1.65V  
KHX1866C9D3K4/  
16GX(XMP)  
16GB(4 x4GB) DS  
KHX1866C9D3T1K3/  
6GX(XMP)  
6GB(3 x 2GB)  
8GB(2 x 4GB)  
DS  
DS  
-
-
-
-
-
-
1.65V  
1.5V  
KINGSTON KHX1866C11D3P1K2/8G  
ASUS P8B75-M LX  
1-15  
DDR3-1600 MHz capability  
DIMM socket  
support (Optional)  
SS/  
DS  
Chip  
Brand  
Vendors  
Part No.  
Size  
Chip NO.  
Timing  
Voltage  
1 DIMM 2 DIMMs  
3CCD-1509  
A EL1126T  
A-DATA  
A-DATA  
A-DATA  
AM2U16BC2P1  
2GB  
3GB(3 x 1GB) SS  
4GB DS  
SS  
A-DATA  
-
-
-
AD31600E001GM(O)U3K  
AM2U16BC4P2  
-
8-8-8-24  
-
1.65V-1.85V  
-
3CCD-1509  
A EL1126T  
A-DATA  
A-DATA  
AX3U1600GC4G9-2G(XMP)  
AX3U1600XC4G79-2X(XMP)  
TR3X3G1600C8D(XMP)  
8GB(2 x 4GB) DS  
8GB(2 x 4GB) DS  
3GB(3 x 1GB) SS  
12GB(6x2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
8GB(2 x 4GB) DS  
8GB(2 x 4GB) DS  
8GB(4 x 2GB) DS  
6GB(3 x 2GB) DS  
2GB(2 x 1GB) SS  
4GB(2 x 2GB) SS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
8GB(2 x 4GB) DS  
8GB(2 x 4GB) DS  
8GB(2 x 4GB) DS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
9-9-9-24  
7-9-7-21  
8-8-8-24  
8-8-8-24  
8-8-8-24  
9-9-9-24  
7-8-7-20  
9-9-9-24  
8-8-8-24  
8-8-8-24  
9-9-9-24  
9-9-9-24  
7-8-7-20  
9-9-9-24  
-
1.55V-1.75V  
1.55V-1.75V  
1.65V  
A-DATA  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
Crucial  
CMD12GX3M6A1600C8(XMP)  
CMP4GX3M2A1600C8(XMP)  
CMP4GX3M2A1600C9(XMP)  
CMP4GX3M2C1600C7(XMP)  
CMX4GX3M2A1600C9(XMP)  
TR3X6G1600C8 G(XMP)  
1.65V  
1.65V  
1.65V  
1.65V  
1.65V  
1.65V  
TR3X6G1600C8D G(XMP)  
TR3X6G1600C9 G(XMP)  
1.65V  
1.65V  
CMP8GX3M2A1600C9(XMP)  
CMZ8GX3M2A1600C7R(XMP)  
CMX8GX3M4A1600C9(XMP)  
BL25664BN1608.16FF(XMP)  
F3-12800CL9D-2GBNQ(XMP)  
F3-12800CL7D-4GBRH(XMP)  
F3-12800CL7D-4GBRM(XMP)  
F3-12800CL8D-4GBRM(XMP)  
F3-12800CL9D-4GBECO(XMP)  
F3-12800CL9D-4GBRL(XMP)  
F3-12800CL9T-6GBNQ(XMP)  
F3-12800CL7D-8GBRH(XMP)  
F3-12800CL8D-8GBECO(XMP)  
F3-12800CL9D-8GBRL(XMP)  
1.65V  
1.50V  
1.65V  
-
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
9-9-9-24  
7-7-7-24  
7-8-7-24  
8-8-8-24  
9-9-9-24  
9-9-9-24  
9-9-9-24  
7-8-7-24  
8-8-8-24  
9-9-9-24  
1.5V  
1.6V  
1.6V  
1.60V  
XMP 1.35V  
1.5V  
1.5V~1.6V  
1.6V  
XMP 1.35V  
1.5V  
16GB ( 4x  
DS  
GEIL  
GET316GB1600C9QC(XMP)  
GV34GB1600C8DC(XMP)  
HMT351U6CFR8C-PB  
-
-
-
9-9-9-28  
8-8-8-28  
-
1.6V  
1.6V  
-
4GB )  
GEIL  
2GB  
4GB  
DS  
DS  
-
H5TQ2G83  
CFR PBC  
HYNIX  
HYNIX  
KINGMAX  
KINGMAX  
KINGMAX  
FLGD45F-B8MF7 MAEH(XMP)  
FLGE85F-B8KJ9A FEIS(XMP)  
FLGE85F-B8MF7 MEEH(XMP)  
1GB  
2GB  
2GB  
SS  
DS  
DS  
-
-
-
-
-
-
-
-
-
-
7
-
-
-
7
-
KINGSTON KHX1600C9D3P1K2/4G  
4GB(2 x 2GB) SS  
12GB(3x4GB) DS  
-
1.5V  
1.65V  
KINGSTON KHX1600C9D3K3/12GX(XMP)  
9-9-9-27  
16GB ( 4GB  
x4 )  
KINGSTON KHX1600C9D3K4/16GX(XMP)  
KINGSTON KHX1600C9AD3/2G  
DS  
-
-
-
-
1.65V  
1.65V  
2GB  
DS  
DS  
-
-
D1288JPN  
DPLD9U  
KINGSTON KVR1600D3N11/2G-ES  
2GB  
KTC  
11-11-11-28 1.35V-1.5V  
KINGSTON KHX1600C7D3K2/4GX(XMP)  
KINGSTON KHX1600C8D3K2/4GX(XMP)  
KINGSTON KHX1600C8D3T1K2/4GX(XMP)  
KINGSTON KHX1600C9D3K2/4GX(XMP)  
KINGSTON KHX1600C9D3LK2/4GX(XMP)  
KINGSTON KHX1600C9D3X2K2/4GX(XMP)  
KINGSTON KHX1600C9D3T1K3/6GX(XMP)  
KINGSTON KHX1600C9D3K3/6GX(XMP)  
4GB ( 2x 2GB ) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
6GB ( 3x 2GB ) DS  
6GB(3 x 2GB) DS  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1.65V  
1.65V  
1.65V  
1.65V  
XMP 1.35V  
1.65V  
1.65V  
1.65V  
1.65V  
1.65V  
1.5V  
-
8
8
9
9
9-9-9-27  
-
9
KINGSTON KHX1600C9D3T1BK3/6GX(XMP) 6GB(3 x 2GB) DS  
9-9-9-27  
KINGSTON KHX1600C9D3K2/8GX(XMP)  
KINGSTON KHX1600C9D3P1K2/8G  
Super Talent WA160UX6G9  
8GB(2 x 4GB) DS  
8GB(2 x 4GB) DS  
6GB(3 x 2GB) DS  
9-9-9-27  
-
9
-
Transcend  
Asint  
JM1600KLN-8GK  
8GB(4GBx2)  
2GB  
DS  
DS  
DS  
DS  
DS  
Transcend TK483PCW3  
-
SLZ3128M8-EGJ1D(XMP)  
SLA302G08-EGG1C(XMP)  
SLA302G08-EGJ1C(XMP)  
M2P2G64CB8HC9N-DG(XMP)  
998659(XMP)  
Asint  
3128M8-GJ1D 9-9-9-24  
1.6V  
-
Asint  
4GB  
Asint  
302G08-GG1C  
-
Asint  
4GB  
Asint  
302G08-GJ1C  
-
-
Elixir  
2GB  
-
-
-
-
-
-
-
-
-
-
Mushkin  
Mushkin  
PATRIOT  
6GB(3 x 2GB) DS  
6GB(3 x 2GB) DS  
4GB(2 x 2GB) DS  
9-9-9-24  
9-9-9-24  
7-7-7-20  
-
998659(XMP)  
1.5~1.6V  
1.7V  
PGS34G1600LLKA  
1-16  
Chapter 1: Product introduction  
DDR3-1333 MHz capability  
DIMM socket  
support (Optional)  
SS/  
DS  
Vendors  
A-DATA  
Part No.  
Size  
Chip Brand  
Chip NO.  
Timing  
Voltage  
1 DIMM 2 DIMMs  
AD31333001GOU  
AD3U1333C2G9  
AD63I1B0823EV  
AM2U139C2P1  
1GB  
2GB  
2GB  
2GB  
2GB  
SS  
SS  
SS  
SS  
SS  
A-Data  
A-DATA  
A-Data  
ADATA  
-
AD30908C8D-151C E0906  
-
-
-
-
-
-
-
-
-
-
A-DATA  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
3CCD-1509HNA1126L  
3CCA-1509A  
3CCD-1509A EL1127T  
AX3U1333C2G9-BP  
AD31333G001GOU  
-
-
3GB(3 x 1GB) SS  
-
8-8-8-24  
1.65-1.85V  
AXDU1333GC2  
G9-2G(XMP)  
1.25V-1.35V  
(low voltage)  
A-DATA  
4GB(2 x 2GB) SS  
-
-
9-9-9-24  
A-DATA  
A-DATA  
A-DATA  
A-DATA  
Apacer  
AD31333G002GMU  
AD63I1C1624EV  
AM2U139C4P2  
2GB  
4GB  
4GB  
8GB  
2GB  
2GB  
2GB  
4GB  
DS  
DS  
DS  
DS  
DS  
DS  
DS  
DS  
-
-
8-8-8-24  
1.65-1.85V  
A-Data  
ADATA  
ELPIDA  
Apacer  
Apacer  
Apacer  
Apacer  
-
3CCA-1509A  
3CCD-1509A EL1127T  
J4208BASE-DJ-F  
AM5D5808DEWSBG  
AM5D5808FEQSBG  
AM5D5808APQSBG  
AM5D5908CEHSBG  
-
-
-
-
-
SU3U1333W8G9-B  
78.A1GC6.9L1  
-
-
-
-
Apacer  
78.A1GC6.9L1  
9
-
Apacer  
AU02GFA33C9NBGC  
78.B1GDE.9L10C  
TR3X3G1333C9 G  
TR3X6G1333C9 G  
-
-
Apacer  
-
-
CORSAIR  
CORSAIR  
3GB(3 x 1GB) SS  
6GB(3 x 2GB) SS  
9-9-9-24  
9-9-9-24  
1.50V  
1.50V  
-
-
CMD24GX3M6A  
1333C9(XMP)  
CORSAIR  
24GB(6 x 4GB) DS  
4GB(2 x 2GB) DS  
-
-
-
9-9-9-24  
9-9-9-24  
1.60V  
CORSAIR  
CORSAIR  
CORSAIR  
CORSAIR  
Crucial  
TW3X4G1333C9D G  
CM3X4GA1333C9N2  
CMX4GX3M1A1333C9  
CMD8GX3M4A1333C7  
CT12864BA1339.8FF  
CT25664BA1339.16FF  
-
1.50V  
4GB  
4GB  
DS  
DS  
CORSAIR  
256MBDCJGELC0401136 9-9-9-24  
-
-
-
9-9-9-24  
1.50V  
8GB(4 x 2GB) DS  
-
-
7-7-7-20  
1.60V  
1GB  
2GB  
SS  
DS  
Micron  
Micron  
9FF22D9KPT  
9KF27D9KPT  
9
9
-
-
Crucial  
BL25664BN  
1337.16FF (XMP)  
Crucial  
6GB(3 x 2GB) DS  
-
-
7-7-7-24  
1.65V  
1.35V(low  
voltage)  
ELPIDA  
ELPIDA  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
G.SKILL  
EBJ10UE8EDF0-DJ-F  
EBJ21UE8EDF0-DJ-F  
1GB  
2GB  
1GB  
SS  
DS  
SS  
ELPIDA  
J1108EDSE-DJ-F  
-
1.35V(low  
voltage)  
ELPIDA  
J1108EDSE-DJ-F  
-
F3-10600CL8  
D-2GBHK(XMP)  
G.SKILL  
-
-
-
-
-
-
-
F3-10600CL9  
D-2GBNQ  
2GB(2 x 1GB) SS  
3GB(3 x 1GB) SS  
4GB(2 x 2GB) DS  
6GB(3 x 2GB) DS  
-
-
-
-
9-9-9-24  
7-7-7-18  
1.5V  
F3-10666CL7  
T-3GBPK(XMP)  
1.5~1.6V  
F3-10666CL8  
D-4GBECO(XMP)  
8-8-8-8-24 XMP 1.35V  
F3-10666CL7  
T-6GBPK(XMP)  
7-7-7-18  
1.5~1.6V  
F3-10666CL7  
D-8GBRH(XMP)  
G.SKILL  
GEIL  
8GB(2 x 4GB) DS  
2GB(2 x 1GB) DS  
4GB(2 x 2GB) DS  
-
-
7-7-7-21  
9-9-9-24  
9-9-9-24  
1.5V  
1.5V  
GV32GB1333C9DC  
-
-
1.3V(low  
voltage)  
GEIL  
GG34GB1333C9DC  
GEIL  
GL1L128M88BA12N  
GEIL  
GEIL  
GV34GB1333C9DC  
GVP34GB1333C7DC  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
-
-
-
-
9-9-9-24  
7-7-7-24  
1.5V  
1.5V  
1.35V(low  
voltage)  
Hynix  
Hynix  
Hynix  
HMT112U6TFR8A-H9  
HMT325U6BFR8C-H9  
HMT125U6TFR8A-H9  
HMT351U6BFR8C-H9  
1GB  
2GB  
2GB  
4GB  
SS  
SS  
DS  
Hynix  
Hynix  
Hynix  
H5TC1G83TFRH9A  
H5TQ2G83BFRH9C  
H5TC1G83TFRH9A  
-
-
-
-
1.35V(low  
voltage)  
Hynix  
DS  
SS  
SS  
SS  
SS  
DS  
DS  
DS  
Hynix  
H5TQ2G83BFRH9C  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
FLFD45F-B8KL9 NAES 1GB  
FLFE85F-C8KF9 CAES 2GB  
FLFE85F-C8KL9 NAES 2GB  
FLFE85F-C8KM9 NAES 2GB  
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
KINGMAX  
KKB8FNWBFGNX-27A  
KFC8FMFXF-DXX-15A  
KFC8FNLXF-DXX-15A  
KFC8FNMXF-BXX-15A  
KKB8FNWBFGNX-26A  
KFC8FNLXF-DXX-15A  
KFC8FNMXF-BXX-15A  
FLFE85F-B8KL9 NEES  
FLFF65F-C8KL9 NEES  
2GB  
4GB  
FLFF65F-C8KM9 NEES 4GB  
KVR1333D3N  
1GB  
KINGSTON  
SS  
ELPIDA  
J1108BDBG-DJ-F  
9
1.5V  
9/1G(low profile)  
KVR1333D3N  
2GB  
KINGSTON  
KINGSTON  
KINGSTON  
SS  
SS  
SS  
Hynix  
H5TQ2G83AFRH9C  
IID77 D9LGK  
9
-
-
9/2G(low profile)  
KVR1333D3S8N9/2G  
2GB  
2GB  
Micron  
ELPIDA  
1.5V  
1.5V  
KVR1333D3S8  
J2108BCSE-DJ-F  
-
N9/2G-SP(low profile)  
KVR1333D3N9/  
2G(low profile)  
KINGSTON  
KINGSTON  
2GB  
2GB  
DS  
DS  
ELPIDA  
KTC  
J1108BFBG-DJ-F  
9
9
1.5V  
1.5V  
KVR1333D3N9/2G  
D1288JPNDPLD9U  
(continued on the next page)  
ASUS P8B75-M LX  
1-17  
DDR3-1066 MHz capability  
DIMM socket  
support (Optional)  
SS/  
DS  
Vendors  
Part No.  
Size  
Chip Brand  
Chip NO.  
Timing  
Voltage  
1.5V  
1 DIMM 2 DIMMs  
KINGSTON  
KINGSTON  
KVR1333D3N9/2G  
2GB  
2GB  
DS  
DS  
ELPIDA  
KTC  
J1108BDSE-DJ-F  
9
-
KVR1333D3N9/2G-  
SP(low profile)  
D1288JEMFNGD9U  
1.5V  
KVR1333D3N9  
/2G-SP(low profile)  
KINGSTON  
KINGSTON  
KINGSTON  
KINGSTON  
KINGSTON  
2GB  
DS  
KINGSTON  
D1288JPSFPGD9U  
-
1.5V  
KHX1333C7D3  
K2/4GX(XMP)  
4GB(2 x 2GB) DS  
4GB(2 x 2GB) DS  
-
-
7
9
9
-
1.65V  
XMP 1.25V  
1.5V  
KHX1333C9D3  
UK2/4GX(XMP)  
-
-
KVR1333D3N  
9/4G(low profile)  
4GB  
4GB  
DS  
DS  
ELPIDA  
ELPIDA  
J2108BCSE-DJ-F  
J2108BCSE-DJ-F  
KVR1333D3N  
9/4G(low profile)  
1.5V  
KINGSTON  
KINGSTON  
KVR1333D3N9/4G  
KVR1333D3N9/4G  
4GB  
4GB  
DS  
DS  
KTC  
D2568JENCNGD9U  
H5TQ2G83AFR  
-
-
1.5V  
-
Hynix  
KVR1333D3N9/  
4G-SP(low profile)  
KINGSTON  
4GB  
DS  
KINGSTON  
D2568JENCPGD9U  
-
1.5V  
Micron  
Micron  
Micron  
Micron  
MT4JTF12864AZ-1G4D1 1GB  
MT8JTF12864AZ-1G4F1 1GB  
MT8JTF25664AZ-1G4D1 2GB  
MT8JTF25664AZ-1G4M1 2GB  
SS  
SS  
SS  
SS  
Micron  
Micron  
Micron  
MICRON  
OJD12D9LGQ  
9FF22D9KPT  
OJD12D9LGK  
IJM22 D9PFJ  
-
-
-
-
-
9
-
-
MT16JTF25664AZ-  
2GB  
Micron  
Micron  
DS  
DS  
Micron  
Micron  
9KF27D9KPT  
OLD22D9LGK  
9
-
-
-
1G4F1  
MT16JTF51264AZ-  
4GB  
1G4D1  
NANYA  
NT4GC64B8HG0NF-CG 4GB  
DS  
SS  
DS  
SS  
SS  
DS  
DS  
DS  
SS  
DS  
DS  
DS  
SS  
NANYA  
NT5CB256M8GN-CG  
A3P1GF3FGF  
A3P1GF3FGF  
K4B1G0846F  
-
-
PSC  
AL7F8G73F-DJ2  
1GB  
PSC  
-
-
PSC  
AL8F8G73F-DJ2  
2GB  
PSC  
-
-
SAMSUNG  
SAMSUNG  
SAMSUNG  
SAMSUNG  
SAMSUNG  
M378B2873FHS-CH9  
M378B5773DH0-CH9  
M378B5673FH0-CH9  
M378B5273CH0-CH9  
M378B1G73AH0-CH9  
1GB  
SAMSUNG  
SAMSUNG  
SAMSUNG  
SAMSUNG  
SAMSUNG  
Hynix  
-
-
2GB  
K4B2G0846D  
-
-
2GB  
K4B1G0846F  
-
-
4GB  
K4B2G0846C  
-
-
8GB  
K4B4G0846A-HCH9  
H5TQ1G83TFR  
K4B1G0846F  
-
-
Super Talent W1333UA1GH  
Super Talent W1333UB2GS  
Super Talent W1333UB4GS  
Super Talent W1333UX6GM  
1GB  
9
9
-
-
2GB  
SAMSUNG  
SAMSUNG  
Micron  
-
4GB  
K4B2G0846C  
-
6GB(3x 2GB)  
2GB  
0BF27D9KPT  
9-9-9-24  
-
1.5V  
-
Transcend  
JM1333KLN-2G  
Hynix  
H5TQ2G83BZRH9C  
PC3-10600  
DDR3-1333 9-9-9  
Century  
1GB  
SS  
NANYA  
NT5CB128M8DN-CF  
-
-
Elixir  
Elixir  
Elixir  
Elixir  
Elixir  
M2F2G64CB88B7N-CG 2GB  
M2F2G64CB88D7N-CG 2GB  
M2F2G64CB88G7N-CG 2GB  
M2F4G64CB8HB5N-CG 4GB  
M2F4G64CB8HD5N-CG 4GB  
SS  
SS  
SS  
DS  
DS  
DS  
SS  
Elixir  
N2CB2G80BN-CG  
N2CB2G80DN-CG  
N2CB2G80GN-CG  
N2CB2G80BN-CG  
N2CB2G80DN-CG  
PM128M8D385-15  
PE911-125E  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Elixir  
Elixir  
Elixir  
Elixir  
KINGSHARE KSRPCD313332G  
2GB  
2GB  
PATRIOT  
MICRON  
KINGSTEK  
KSTD3PC-10600  
SEC 904 HCH9  
K4B1G0846D  
Kingtiger  
2GB DIMM PC3-10666  
2GB  
2GB  
2GB  
DS  
DS  
DS  
SAMSUNG  
-
-
-
-
-
-
-
Kingtiger  
KTG2G1333PG3  
-
BMD32048M1333C9-  
1123  
MARKVISION  
MARKVISION M3D1288P-13  
MARKVISION M3D2568E-13  
BMD34096M1333C9-  
1124  
MARKVISION  
4GB  
DS  
-
-
PATRIOT  
PATRIOT  
PATRIOT  
PATRIOT  
RAMAXEL  
RAMAXEL  
RiDATA  
PSD31G13332H  
PSD31G13332  
1GB  
1GB  
2GB  
8GB  
DS  
DS  
DS  
DS  
DS  
DS  
DS  
DS  
-
-
9
-
PATRIOT  
-
PM64M8D38U-15  
-
-
PSD32G13332H  
PG38G1333EL(XMP)  
-
-
-
-
-
9-9-9-24  
1.5V  
RMR1870ED48E8F-1333 2GB  
RMR1870EC58E9F-1333 4GB  
ELPIDA  
ELPIDA  
RiDATA  
RiDATA  
J1108BDBG-DJ-F  
-
-
-
-
-
J2108BCSE-DJ-F  
-
C304627CB1AG22Fe  
E304459CB1AG32Cf  
2GB  
4GB  
N/A  
N/A  
9
9
RiDATA  
SILICON  
POWER  
SP001GBLTU133S01  
SP001GBLTU133S02  
SP002GBLTU133S02  
1GB  
1GB  
2GB  
1GB  
2GB  
2GB  
2GB  
SS  
SS  
DS  
SS  
DS  
DS  
DS  
NANYA  
NT5CB128M8AN-CG  
9
-
SILICON  
POWER  
Elixir  
N2CB1680AN-C6  
9
-
SILICON  
POWER  
Elixir  
N2CB1680AN-C6  
9
-
TMS1GB364D081-  
107EY  
TAKEMS  
TAKEMS  
TAKEMS  
TAKEMS  
-
-
-
-
-
-
-
-
7-7-7-20  
7-7-7-20  
8-8-8-24  
8-8-8-24  
1.5V  
1.5V  
1.5V  
1.5V  
TMS2GB364D081-  
107EY  
TMS2GB364D081-  
138EY  
TMS2GB364D082-  
138EW  
UMAX  
E41302GP0-73BDB  
3WVS31333-2G-CNR  
2GB  
2GB  
DS  
DS  
UMAX  
AMPO  
U2S24D30TP-13  
AM3420803-13H  
-
-
-
-
WINTEC  
1-18  
Chapter 1: Product introduction  
DDR3-1066 MHz capability  
DIMM socket  
support (Optional)  
SS/  
DS  
Chip  
Brand  
Vendors  
Crucial  
Part No.  
Size  
Chip NO.  
Timing  
Voltage  
1 DIMM  
2 DIMMs  
CT12864BA1067.8FF  
CT25664BA1067.16FF  
EBJ10UE8EDF0-AE-F  
EBJ21UE8EDF0-AE-F  
1GB SS  
Micron  
9GF22D9KPT  
9HF22D9KPT  
7
7
-
-
-
Crucial  
ELPIDA  
ELPIDA  
2GB DS Micron  
1GB SS  
2GB DS ELPIDA J1108EDSE-DJ-F  
ELPIDA J1108EDSE-DJ-F  
1.35V(low voltage)  
1.35V(low voltage)  
-
KVR1066D3N7/1G(low  
profile)  
KINGSTON  
1GB SS ELPIDA J1108BFSE-DJ-F  
2GB DS ELPIDA J1108BDSE-DJ-F  
7
1.5V  
KINGSTON KVR1066D3N7/2G  
KINGSTON KVR1066D3N7/4G  
7
7
7
7
-
1.5V  
4GB DS Hynix  
Micron  
H5TQ2G83AFR  
9GF22D9KPT  
1.5V  
Micron  
MT8JTF12864AZ-1G1F1 1GB SS  
-
-
-
Micron  
MT16JTF25664AZ-1G1F1 2GB DS Micron  
9HF22D9KPT  
Kingtiger  
2GB DIMM PC3-8500  
2GB DS Hynix  
H5TQ1G83AFP G7C  
Side(s): SS - Single-sided DS - Double-sided  
DIMM support:  
1 DIMM: Supports one (1) module inserted into any slot as Single-channel memory  
configuration. We suggest that you install the module into A1 slot.  
2 DIMMs: Supports two (2) modules inserted into the blue slots and the black slots as  
one pair of Dual-channel memory configuration.  
ASUS P8B75-M LX  
1-19  
1.7.3  
Installing a DIMM  
Unplug the power supply before adding or removing DIMMs or other system components.  
Failure to do so can cause severe damage to both the motherboard and the components.  
2
1.  
2.  
Press the retaining clips outward to  
unlock a DIMM socket.  
DIMM notch  
1
Align a DIMM on the socket such that  
the notch on the DIMM matches the  
DIMM slot key on the socket.  
Unlocked  
DIMM slot key  
retaining clip  
A DIMM is keyed with a notch so that it fits in only one direction. DO NOT force a DIMM into  
a socket in the wrong direction to avoid damaging the DIMM.  
3
3.  
Firmly insert the DIMM into the socket  
until the retaining clips snap back in place  
and the DIMM is properly seated.  
Locked Retaining Clip  
1.7.4  
Removing a DIMM  
To remove a DIMM:  
1. Simultaneously press the retaining clips  
outward to unlock the DIMM.  
2
Support the DIMM lightly with your  
fingers when pressing the retaining  
clips. The DIMM might get damaged  
when it flips out with extra force.  
1
DIMM notch  
2.  
Remove the DIMM from the socket.  
1-20  
Chapter 1: Product introduction  
 
1.8  
Expansion slots  
In the future, you may need to install expansion cards. The following sub-sections describe  
the slots and the expansion cards that they support.  
Unplug the power cord before adding or removing expansion cards. Failure to do so may  
cause you physical injury and damage motherboard components.  
1.8.1  
Installing an expansion card  
To install an expansion card:  
1.  
Before installing the expansion card, read the documentation that came with it and  
make the necessary hardware settings for the card.  
2.  
3.  
Remove the system unit cover (if your motherboard is already installed in a chassis).  
Remove the bracket opposite the slot that you intend to use. Keep the screw for later  
use.  
4.  
Align the card connector with the slot and press firmly until the card is completely  
seated on the slot.  
5.  
6.  
Secure the card to the chassis with the screw you removed earlier.  
Replace the system cover.  
1.8.2  
Configuring an expansion card  
After installing the expansion card, configure it by adjusting the software settings.  
1.  
Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for  
information on BIOS setup.  
2.  
3.  
Assign an IRQ to the card.  
Install the software drivers for the expansion card.  
When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that  
the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI  
groups, making the system unstable and the card inoperable.  
1.8.3  
PCI slot  
The PCI slot supports card such as a LAN card, SCSI card, USB card, and other cards that  
comply with PCI specifications.  
1.8.4  
PCI Express 2.0 x1 slots  
This motherboard supports PCI Express 2.0 x1 network cards, SCSI cards, and other cards  
that comply with the PCI Express specifications.  
1.8.5  
PCI Express 3.0/2.0 x16 slot  
This motherboard has a PCI Express 3.0/2.0 x16 slot that supports PCI Express 3.0/2.0 x16  
graphic cards complying with the PCI Express specifications.  
ASUS P8B75-M LX  
1-21  
 
IRQ assignments for this motherboard  
A
B
C
D
E
F
G
H
Intel PCH SATA controller #0  
shared  
Intel PCH SATA controller #1  
Realtek 8111F controller  
shared  
shared  
1.9  
Jumpers  
1.  
Clear RTC RAM (3-pin CLRTC)  
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can  
clear the CMOS memory of date, time, and system setup parameters by erasing  
the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in  
CMOS, which include system setup information such as system passwords.  
CLRTC  
1
2
2
3
P8B75-M LX  
Normal  
Clear RTC  
(Default)  
P8B75-M LX Clear RTC RAM  
To erase the RTC RAM:  
1. Turn OFF the computer and unplug the power cord.  
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3  
for about 5-10 seconds, then move the cap back to pins 1-2.  
3. Plug the power cord and turn ON the computer.  
4. Hold down the <Del> key during the boot process and enter BIOS setup to re-enter  
data.  
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default  
position. Removing the cap will cause system boot failure!  
If the steps above do not help, remove the onboard battery and move the jumper again  
to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the battery.  
You do not need to clear the RTC when the system hangs due to overclocking. For  
system failure due to overclocking, use the CPU Parameter Recall (C.P.R.) feature. Shut  
down and reboot the system, then the BIOS automatically resets parameter settings to  
default values.  
1-22  
Chapter 1: Product introduction  
 
1.10  
Connectors  
1.10.1  
Rear panel connectors  
1
2
3 4  
10  
9
8
7
6
5
1.  
2.  
PS/2 Mouse port (green). This port is for a PS/2 mouse.  
LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)  
through a network hub. Refer to the table below for the LAN port LED indications.  
LAN port LED indications  
Speed  
LED  
Activity Link  
LED  
ACT/LINK LED  
Description  
No link  
SPEED LED  
Status  
OFF  
Status  
Description  
OFF  
10 Mbps connection  
ORANGE  
Linked  
ORANGE 100 Mbps connection  
GREEN 1 Gbps connection  
BLINKING Data activity  
LAN port  
3.  
4.  
Line In port (light blue). This port connects the tape, CD, DVD player, or other audio  
sources.  
Line Out port (lime). This port connects to a headphone or a speaker. In 4-channel,  
6-channel, and 8-channel configurations, the function of this port becomes Front  
Speaker Out.  
5.  
Microphone port (pink). This port connects a microphone.  
Refer to the audio configuration table below for the function of the audio ports in the 2, 4, 6,  
or 8-channel configuration.  
Audio 2, 4, 6, 8-channel configuration  
Port  
Headset 2-channel  
4-channel  
Rear Speaker Out  
Front Speaker Out  
Mic In  
6-channel  
Rear Speaker Out  
Front Speaker Out  
Bass/Center  
-
8-channel  
Light Blue (Rear panel)  
Lime (Rear panel)  
Pink (Rear panel)  
Lime (Front panel)  
Line In  
Line Out  
Mic In  
-
Rear Speaker Out  
Front Speaker Out  
Bass/Center  
-
Side Speaker Out  
To configure an 8-channel audio output:  
Use a chassis with HD audio module in the front panel to support an 8-channel audio output.  
ASUS P8B75-M LX  
1-23  
 
6.  
7.  
USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are  
available for connecting USB 2.0/1.1 devices.  
USB 3.0 ports 1 and 2. These two 9-pin Universal Serial Bus (USB) ports connect to  
USB 3.0/2.0 devices.  
DO NOT connect a keyboard / mouse to any USB 3.0 port when installing Windows®  
operating system.  
Due to USB 3.0 controller limitation, USB 3.0 devices can only be used under Windows®  
OS environment and after the USB 3.0 driver installation.  
USB 3.0 devices can only be used as data storage only.  
We strongly recommend that you connect USB 3.0 devices to USB 3.0 ports for faster  
and better performance for your USB 3.0 devices.  
8.  
9.  
Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other  
VGA-compatible devices.  
DVI-D port. This port is for any DVI-D compatible device. DVI-D can’t be converted to  
output RGB Signal to CRT and isn’t compatible with DVI-I.  
10. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports are  
available for connecting USB 2.0/1.1 devices.  
1-24  
Chapter 1: Product introduction  
1.10.2  
Internal connectors  
1.  
Front panel audio connector (10-1 pin AAFP)  
This connector is for a chassis-mounted front panel audio I/O module that supports  
either HD Audio or legacy AC`97 audio standard. Connect one end of the front panel  
audio I/O module cable to this connector.  
AAFP  
PIN 1  
PIN 1  
P8B75-M LX  
HD-audio-compliant  
pin definition  
Legacy AC’97  
compliant definition  
P8B75-M LX Front panel audio connector  
We recommend that you connect a high-definition front panel audio module to this  
connector to avail of the motherboard’s high-definition audio capability.  
If you want to connect a high-definition front panel audio module to this connector, set  
the Front Panel Type item in the BIOS setup to [HD]. If you want to connect an AC'97  
front panel audio module to this connector, set the item to [AC97]. By default, this  
connector is set to [HD]. See section 2.5.7 Onboard Devices Configuration for details.  
2.  
Digital audio connector (4-1 pin SPDIF_OUT)  
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port. Connect  
the S/PDIF Out module cable to this connector, then install the module to a slot  
opening at the back of the system chassis.  
P8B75-M LX  
SPDIF_OUT  
P8B75-M LX Digital audio connector  
The S/PDIF module is purchased separately.  
ASUS P8B75-M LX  
1-25  
 
3.  
ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)  
These connectors are for ATX power supply plugs. The power supply plugs are  
designed to fit these connectors in only one orientation. Find the proper orientation and  
push down firmly until the connectors completely fit.  
EATX12V  
EATXPWR  
+3 Volts  
GND  
+12 Volts  
+12 Volts  
+5V Standby  
Power OK  
GND  
+5 Volts  
+5 Volts  
+5 Volts  
-5 Volts  
GND  
PIN 1  
+5 Volts  
GND  
GND  
GND  
P8B75-M LX  
+5 Volts  
GND  
PSON#  
GND  
+3 Volts  
+3 Volts  
-12 Volts  
+3 Volts  
PIN 1  
P8B75-M LX ATX power connectors  
For a fully configured system, we recommend that you use a power supply unit (PSU)  
that complies with ATX 12 V Specification 2.0 (or later version) and provides a minimum  
power of 350 W.  
DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will  
not boot up.  
We recommend that you use a PSU with higher power output when configuring a  
system with more power-consuming devices. The system may become unstable or may  
not boot up if the power is inadequate.  
If you are uncertain about the minimum power supply requirement for your system,  
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.  
4.  
Serial port connector (10-1 pin COM1)  
This connector is for a serial (COM) port. Connect the serial port module cable to this  
connector, then install the module to a slot opening at the back of the system chassis.  
COM1  
PIN 1  
P8B75-M LX  
P8B75-M LX Serial port (COM1) connector  
The COM module is purchased separately.  
1-26  
Chapter 1: Product introduction  
5.  
CPU and chassis fan connectors (4-pin CPU_FAN, 3-pin CHA_FAN)  
Connect the fan cables to the fan connectors on the motherboard, ensuring that the  
black wire of each cable matches the ground pin of the connector.  
CPU_FAN  
CHA_FAN  
P8B75-M LX  
GND  
CHA FAN PWR  
CHA FAN IN  
P8B75-M LX fan connectors  
Do not forget to connect the fan cables to the fan connectors. Insufficient air flow inside the  
system may damage the motherboard components. These are not jumpers! Do not place  
jumper caps on the fan connectors!  
The CPU_FAN connector supports a CPU fan of maximum 2A (24 W) fan power.  
Only the 4-pin CPU fan supports the ASUS Fan Xpert feature.  
6.  
LPT connector (26-1 pin LPT)  
The LPT (Line Printing Terminal) connector supports devices such as a printer. LPT is  
standardized as IEEE 1284, which is the parallel port interface on IBM PC-compatible  
computers.  
LPT  
PIN 1  
P8B75-M LX  
P8B75-M LX Parallel Port Connector  
ASUS P8B75-M LX  
1-27  
7.  
System panel connector (10-1 pin F_PANEL)  
This connector supports several chassis-mounted functions.  
F_PANEL  
PWR LED PWR BTN  
PIN 1  
P8B75-M LX  
+HD_LED RESET  
P8B75-M LX System panel connector  
System power LED (2-pin PLED)  
This 2-pin connector is for the system power LED. Connect the chassis power LED  
cable to this connector. The system power LED lights up when you turn on the system  
power, and blinks when the system is in sleep mode.  
Hard disk drive activity LED (2-pin +HDLED)  
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable  
to this connector. The IDE LED lights up or flashes when data is read from or written to  
the HDD.  
ATX power button/soft-off button (2-pin PWRBTN)  
This 2-pin connector is for the system power button.  
Reset button (2-pin RESET)  
This 2-pin connector is for the chassis-mounted reset button for system reboot without  
turning off the system power.  
8.  
Speaker connector (4-pin SPEAKER)  
The 4-pin connector is for the chassis-mounted system warning speaker. The speaker  
allows you to hear system beeps and warnings.  
SPEAKER  
P8B75-M LX  
PIN 1  
P8B75-M LX Speaker Out Connector  
1-28  
Chapter 1: Product introduction  
9.  
Intel® B75 Serial ATA 3.0Gb/s connectors (7-pin SATA3G_1~5 [blue])  
These connectors connect to Serial ATA 3.0 Gb/s hard disk drives and optical drives via  
Serial ATA 3.0 Gb/s signal cables.  
SATA3G_1  
SATA3G_2  
SATA3G_3  
SATA3G_4  
P8B75-M LX  
SATA3G_5  
P8B75-M LX Intel® SATA 3.0Gb/s connectors  
You must install Windows® XP Service Pack 3 or later version before using Serial ATA  
hard disk drives.  
When using hot-plug and NCQ, set the SATA Mode Selection item in the BIOS to  
[AHCI]. See section 2.5.3 SATA Configuration for details.  
10. Intel® B75 Serial ATA 6.0Gb/s connectors (7-pin SATA6G_1 [gray])  
These connectors connect to Serial ATA 6.0 Gb/s hard disk drives via Serial ATA 6.0  
Gb/s signal cables.  
SATA6G_1  
P8B75-M LX  
P8B75-M LX Intel® SATA 6.0Gb/s connectors  
You must install Windows® XP Service Pack 3 or later version before using Serial ATA  
hard disk drives.  
When using hot-plug and NCQ, set the SATA Mode Selection item in the BIOS to  
[AHCI]. See section 2.5.3 SATA Configuration for details.  
ASUS P8B75-M LX  
1-29  
11. USB 3.0 connector (20-1 pin USB3_34)  
This connector is for the additional USB 3.0 ports. Connect the USB 3.0 bracket cable  
to this connector, then install the USB 3.0 bracket to the rear side of the chassis. If your  
chassis support customized front panel installation, with ASUS USB 3.0 header, you  
can have a front panel USB 3.0 solution.  
USB3_34  
P8B75-M LX  
P8B75-M LX USB3.0 Front panel connector  
The USB 3.0 module is purchased separately.  
12. USB 2.0 connectors (10-1 pin USB56, USB78)  
These connectors are for USB 2.0 ports. Connect the USB module cable to any of  
these connectors, then install the module to a slot opening at the back of the system  
chassis. These USB connectors comply with USB 2.0 specification that supports up to  
480 Mbps connection speed.  
USB78  
USB56  
P8B75-M LX  
P8B75-M LX USB2.0 connector  
Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard!  
The USB module cable is purchased separately.  
1-30  
Chapter 1: Product introduction  
13. Chassis intrusion connector (4-1 pin CHASSIS)  
This connector is for a chassis-mounted intrusion detection sensor or switch. Connect  
one end of the chassis intrusion sensor or switch cable to this connector. The chassis  
intrusion sensor or switch sends a high-level signal to this connector when a chassis  
component is removed or replaced. The signal is then generated as a chassis intrusion  
event.  
By default, the pin labeled “Chassis Signal” and “Ground” are shorted with a jumper  
cap. Remove the jumper caps only when you intend to use the chassis intrusion  
detection feature.  
CHASSIS  
P8B75-M LX  
P8B75-M LX Chassis intrusion connector  
1.11  
Onboard LEDs  
1.  
Standby Power LED  
The motherboard comes with a standby power LED that lights up to indicate that the  
system is ON, in sleep mode, or in soft-off mode. This is a reminder that you should  
shut down the system and unplug the power cable before removing or plugging in any  
motherboard component. The illustration below shows the location of the onboard LED.  
SB_PWR  
P8B75-M LX  
ON  
OFF  
Standby Power Powered Off  
P8B75-M LX Onboard LED  
ASUS P8B75-M LX  
1-31  
 
1.13  
Software support  
1.13.1  
Installing an operating system  
This motherboard supports Windows® XP / Vista / 7 Operating Systems (OS). Always install  
the latest OS version and corresponding updates to maximize the features of your hardware.  
Motherboard settings and hardware options vary. Refer to your OS documentation for  
detailed information.  
Ensure that you install Windows® XP Service Pack 3 or later versions / Windows® Vista  
Service Pack 1 or later versions before installing the drivers for better compatibility and  
system stability.  
1.13.2  
Support DVD information  
The Support DVD that comes with the motherboard package contains the drivers, software  
applications, and utilities that you can install to avail all motherboard features.  
The contents of the Support DVD are subject to change at any time without notice. Visit the  
To run the Support DVD  
Place the Support DVD to the optical drive. If Autorun is enabled in your computer, the DVD  
automatically displays the Specials screen. Click Drivers, Utilities, Manual, Contact, and  
Specials tabs to display their respective menus.  
The following screen is for reference only.  
Click an icon to  
display Support DVD/  
motherboard information  
Click an item to install  
If Autorun is NOT enabled in your computer, browse the contents of the Support DVD to  
locate the file ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run  
the DVD.  
1-32  
Chapter 1: Product introduction  
 
1.13.3  
Intel® SBA support  
Intel® SBA (Small Business Advantage) is a combination of hardware and software that  
provides unique security and productivity capabilities designed for small businesses.  
Intel® SBA requires MEI driver (AMT host software kit) installed.  
Platform requirements:  
Windows® 7 (32/64bit)  
Panther Point PCH with Core™ Ivy Bridge CPU or Sandy Bridge CPU (Chief River/  
Maho Bay platforms) with 5MB vPro ME 8.0 firmware load  
CPU and chipsets requirements:  
*
*
*
*
*
Intel® Core™ i3 with B75  
Intel® Core™ i5 with B75  
Intel® Core™ i7 with B75  
Intel® vPro™ i5 with one of these chipsets: B75, Q77  
Intel® vPro™ i7 with one of these chipsets: B75, Q77  
The Intel® Management Engine software kit must be installed (The Local Manageability  
Service and the Intel® Management Engine Interface must be installed and running.)  
Local Administrator rights on the target machine  
THE Intel® SBA does not support the 800 x 600 screen resolution.  
Visit the ASUS website at www.asus.com for the latest CPU QVL (Qualified Vendors  
List).  
ASUS P8B75-M LX  
1-33  
 
1-34  
Chapter 1: Product introduction  
Chapter 2  
BIOS information  
2.1  
Managing and updating your BIOS  
Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to  
restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update  
utility.  
2.1.1  
ASUS Update utility  
The ASUS Update is a utility that allows you to manage, save, and update the motherboard  
BIOS in Windows® environment.  
ASUS Update requires an Internet connection either through a network or an Internet  
Service Provider (ISP).  
This utility is available in the support DVD that comes with the motherboard package.  
Installing ASUS Update  
To install ASUS Update:  
1.  
2.  
3.  
Place the support DVD in the optical drive. The Specials menu appears.  
Click the Utilities tab, then click AI Suite II.  
Follow the onscreen instructions to complete the installation.  
Quit all Windows® applications before you update the BIOS using this utility.  
Updating the BIOS  
To update the BIOS:  
1.  
From the Windows® desktop, click Start > Programs > ASUS > AI Suite II > AI Suite II X.XX.XX to  
launch the AI Suite II utility. The AI Suite II Quick Bar appears.  
2.  
Click Update button from the Quick Bar, and then click ASUS Update from the popup menu. The  
ASUS Update main screen appears. From the list, select either of the following methods:  
Updating from the Internet  
a.  
b.  
c.  
Select Update BIOS from the Internet, then click Next.  
Select the ASUS FTP site nearest you to avoid network traffic, then click Next.  
From the FTP site, select the BIOS version that you wish to download then click Next.  
ASUS P8B75-M LX  
2-1  
 
The ASUS Update utility is capable of updating itself through the Internet. Always update  
the utility to avail all its features.  
Updating from a BIOS file  
a.  
Select Update BIOS from file, then click Next.  
b.  
Locate the BIOS file from the Open window, then click Open.  
3.  
Follow the onscreen instructions to complete the updating process.  
2.1.2  
ASUS EZ Flash 2  
The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS-based  
utility.  
Before you start using this utility, download the latest BIOS file from the ASUS website at  
To update the BIOS using EZ Flash 2:  
1.  
Insert the USB flash disk that contains the latest BIOS file to the USB port.  
2.  
Enter the Advanced Mode of the BIOS setup program. Go to the Tool menu to select ASUS EZ  
Flash Utility and press <Enter> to enable it.  
Exit  
ASUS EZ Flash 2 Utility V01.04  
Flash Info  
MODEL: P8B75-M LX  
VER: 0203  
DATE: 04/01/2012  
File Path:  
Drive Info  
fs0:\  
Folder Info  
04/01/2012 10:23p  
8390656  
P8B75MLX.CAP  
File Info  
MODEL:  
VER:  
DATE  
Help Info  
[Enter] Select or Load  
[Tab] Switch  
[Up/Down/PageUp/PageDown/Home/End] Move  
[Esc] Exit  
2-2  
Chapter 2: BIOS information  
 
3.  
Press <Tab> to switch to the Drive field.  
4.  
Press the Up/Down arrow keys to find the USB flash disk that contains the latest BIOS, and then  
press <Enter>.  
5.  
Press <Tab> to switch to the Folder Info field.  
6.  
Press the Up/Down arrow keys to find the BIOS file, and then press <Enter> to perform the BIOS  
update process. Reboot the system when the update process is done.  
This function supports USB flash disks with FAT 32/16 format and single partition only.  
DO NOT shut down or reset the system while updating the BIOS to prevent system boot  
failure!  
2.1.3  
ASUS CrashFree BIOS 3 utility  
The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file  
when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS  
file using the motherboard support DVD or a USB flash drive that contains the updated BIOS  
file.  
Before using this utility, rename the BIOS file in the removable device into  
P8B75MLX.CAP.  
The BIOS file in the support DVD may not be the latest version. Download the latest  
BIOS file from the ASUS website at www.asus.com.  
Recovering the BIOS  
To recover the BIOS:  
1.  
Turn on the system.  
2.  
Insert the support DVD to the optical drive or the USB flash drive that contains the BIOS file to the  
USB port.  
3.  
The utility automatically checks the devices for the BIOS file. When found, the utility reads the BIOS  
file and enters ASUS EZ Flash 2 utility automatically.  
4.  
The system requires you to enter BIOS Setup to recover BIOS setting. To ensure system  
compatibility and stability, we recommend that you press <F5> to load default BIOS values.  
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause  
system boot failure!  
ASUS P8B75-M LX  
2-3  
 
2.1.4  
ASUS BIOS Updater  
The ASUS BIOS Updater allows you to update BIOS in DOS environment. This utility also  
allows you to copy the current BIOS file that you can use as a backup when the BIOS fails or  
gets corrupted during the updating process.  
The succeeding utility screens are for reference only. The actual utility screen displays may  
not be same as shown.  
Before updating BIOS  
1.  
Prepare the motherboard support DVD and a USB flash drive in FAT32/16 format and single  
partition.  
2.  
Download the latest BIOS file and BIOS Updater from the ASUS website at  
http://support.asus.com and save them on the USB flash drive.  
NTFS is not supported under DOS environment. Do not save the BIOS file and BIOS  
Updater to a hard disk drive or USB flash drive in NTFS format.  
3.  
Turn off the computer and disconnect all SATA hard disk drives (optional).  
Booting the system in DOS environment  
1.  
Insert the USB flash drive with the latest BIOS file and BIOS Updater to the USB port.  
2.  
Boot your computer. When the ASUS Logo appears, press <F8> to show the BIOS Boot Device  
Select Menu. Insert the support DVD into the optical drive and select the optical drive as the boot  
device.  
Please select boot device:  
SATA: XXXXXXXXXXXXXXXX  
USB XXXXXXXXXXXXXXXXX  
UEFI: XXXXXXXXXXXXXXXX  
Enter Setup  
and to move selection  
ENTER to select boot device  
ESC to boot using defaults  
3.  
4.  
When the Make Disk menu appears, select the FreeDOS command prompt item by pressing the  
item number.  
At the FreeDOS prompt, type d:and press <Enter> to switch the disk from  
Drive C (optical drive) to Drive D (USB flash drive).  
Welcome to FreeDOS (http://www.freedos.org)!  
C:\>d:  
D:\>  
2-4  
Chapter 2: BIOS information  
 
Updating the BIOS file  
To update the BIOS file using BIOS Updater  
1.  
At the FreeDOS prompt, type bupdater /pc /gand press <Enter>.  
D:\>bupdater /pc /g  
2.  
The BIOS Updater screen appears as below.  
ASUSTek BIOS Updater for DOS V1.28  
Current ROM  
BOARD: P8B75-M LX  
VER: 0203  
Update ROM  
BOARD: Unknown  
VER: Unknown  
DATE: 04/01/2012  
DATE: Unknown  
PATH: A:\  
A:  
P8B75LX.CAP  
8390656 2012-041-01 17:30:48  
Note  
[Enter] Select or Load  
[Up/Down/Home/End] Move  
[Tab] Switch  
[B] Backup  
[V] Drive Info  
[Esc] Exit  
3.  
Press <Tab> to switch between screen fields and use the <Up/Down/Home/End> keys to select  
the BIOS file and press <Enter>. BIOS Updater checks the selected BIOS file and prompts you to  
confirm BIOS update.  
Are you sure to update BIOS?  
Yes  
No  
4.  
Select Yes and press <Enter>. When BIOS update is done, press <ESC> to exit BIOS Updater.  
Restart your computer.  
DO NOT shut down or reset the system while updating the BIOS to prevent system boot  
failure!  
For BIOS Updater version 1.04 or later, the utility automatically exits to the DOS prompt  
after updating BIOS.  
Ensure to load the BIOS default settings to ensure system compatibility and stability.  
Select the Load Optimized Defaults item under the Exit menu. Refer to section 2.9  
Exit menu for details.  
Ensure to connect all SATA hard disk drives after updating the BIOS file if you have  
disconnected them.  
ASUS P8B75-M LX  
2-5  
2.2  
BIOS setup program  
Use the BIOS Setup program to update the BIOS or configure its parameters. The BIOS  
screens include navigation keys and brief online help to guide you in using the BIOS Setup  
program.  
Entering BIOS Setup at startup  
To enter BIOS Setup at startup:  
Press <Delete> during the Power-On Self Test (POST). If you do not press <Delete>,  
POST continues with its routines.  
Entering BIOS Setup after POST  
To enter BIOS Setup after POST:  
Press <Ctrl>+<Alt>+<Del> simultaneously.  
Press the reset button on the system chassis.  
Press the power button to turn the system off then back on. Do this option only if you  
failed to enter BIOS Setup using the first two options.  
Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force  
reset from a running operating system can cause damage to your data or system. We  
recommend to always shut down the system properly from the operating system.  
The BIOS setup screens shown in this section are for reference purposes only, and may  
not exactly match what you see on your screen.  
motherboard.  
Ensure that a USB mouse is connected to your motherboard if you want to use the  
mouse to control the BIOS setup program.  
If the system becomes unstable after changing any BIOS setting, load the default  
settings to ensure system compatibility and stability. Select the Load Optimized  
Defaults item under the Exit menu. See section 2.9 Exit Menu for details.  
If the system fails to boot after changing any BIOS setting, try to clear the CMOS and  
reset the motherboard to the default value. See section 1.9 Jumpers for information on  
how to erase the RTC RAM.  
BIOS menu screen  
The BIOS setup program can be used under two modes: EZ Mode and Advanced Mode.  
You can change modes from the Exit menu or from the Exit/Advanced Mode button in the  
EZ Mode/Advanced Mode screen.  
2-6  
Chapter 2: BIOS information  
 
EZ Mode  
By default, the EZ Mode screen appears when you enter the BIOS setup program. The EZ  
Mode provides you an overview of the basic system information, and allows you to select  
the display language, system performance mode and boot device priority. To access the  
Advanced Mode, click Exit/Advanced Mode, then select Advanced Mode or press F7 hot  
key for the advanced BIOS settings.  
The default screen for entering the BIOS setup program can be changed. Refer to the  
Setup Mode item in section 2.7 Boot menu for details.  
Selects the display language of  
the BIOS setup program  
Displays the CPU/motherboard temperature,  
Exits the BIOS setup program without saving  
CPU/5V/3.3V/12V voltage output,  
CPU/chassis fan speed  
the changes, saves the changes and resets  
the system, or enters the Advanced Mode  
Exit/Advanced Mode  
UEFI BIOS Utility - EZ Mode  
P8B75-M LX  
English  
BIOS Version : 0203  
CPU Type : Genuine Intel(R) CPU @ 2.90GHz  
Total Memory : 1024 MB (DDR3 1333MHz)  
Speed : 2900 MHz  
Friday [10/08/2010]  
Temperature  
Voltage  
Fan Speed  
CPU  
MB  
+113.0ºF/+45.0ºC  
+75.2ºF/+40.0ºC  
CPU  
3.3V  
1.248V  
3.344V  
5V  
5.160V  
CPU_FAN  
3325RPM CHA_FAN1  
N/A  
12V  
12.248V  
System Performance  
Quiet  
Performance  
Boot Priority  
Energy Saving  
Normal  
Use the mouse to drag or keyboard to navigate to decide the boot priority.  
Shortcut (F3) Advanced Mode(F7)  
Boot Menu(F8)  
Default(F5)  
Power Saving mode  
Loads optimized default  
ASUS Optimal mode  
Quick access to a few  
utilities and advanced  
settings  
Normal mode  
Selects the boot device priority  
Selects the boot  
device priority  
Displays the system properties of the  
selected mode on the right hand side  
Enters the Advanced Mode  
The boot device options vary depending on the devices you installed to the system.  
The Boot Menu(F8) button is available only when the boot device is installed to the  
system.  
ASUS P8B75-M LX  
2-7  
Advanced Mode  
The Advanced Mode provides advanced options for experienced end-users to configure  
the BIOS settings. The figure below shows an example of the Advanced Mode. Refer to the  
following sections for the detailed configurations.  
To access the EZ Mode, click Exit, then select ASUS EZ Mode.  
Back button  
UEFI BIOS Utility - Advanced Mode  
Menu items  
Menu bar  
Configuration fields  
General help  
Exit  
Main  
Back  
Ai Tweaker  
Advanced  
Monitor  
Boot  
Tool  
Advanced\ Onboard Devices Configuration  
>
Enabled/Disabled Realtek Controller.  
HD Audio Controller  
Front Panel Type  
Enabled  
HD  
Realtek LAN Controller  
Realtek PXE OPROM  
Enabled  
Disabled  
Realtek LAN Controller  
Disabled  
Enabled  
>
>
Serial Port Configuration  
Parallel Port Configuration  
→←: Select Screen  
↑↓: Select Item  
Enter: Select  
+/-: Change Opt.  
F1: General Help  
F2: Previous Values  
F3: Shortcut  
F5: Optimized Defaults  
F6: ASUS Ratio Boost  
F10: Save ESC: Exit  
F12: Print Screen  
Version 2.10.1208. Copyright (C) 2012 American Megatrends, Inc.  
Pop-up window  
Scroll bar  
Submenu items  
Navigation keys  
Menu items  
The highlighted item on the menu bar displays the specific items for that menu. For example,  
selecting Main shows the Main menu items.  
The other items (Ai Tweaker, Advanced, Monitor, Boot, Tool, and Exit) on the menu bar have  
their respective menu items.  
Back button  
This button appears when entering a submenu. Press <Esc> or use the USB mouse to click  
this button to return to the previous menu screen.  
Submenu items  
A greater than sign (>) before each item on any menu screen means that the item has a  
submenu. To display the submenu, select the item and press <Enter>.  
2-8  
Chapter 2: BIOS information  
Pop-up window  
Select a menu item and press <Enter> to display a pop-up window with the configuration  
options for that item.  
Scroll bar  
A scroll bar appears on the right side of a menu screen when there are items that do not fit on  
the screen. Press the Up/Down arrow keys or <Page Up> / <Page Down> keys to display the  
other items on the screen.  
Navigation keys  
At the bottom right corner of the menu screen are the navigation keys for the BIOS setup  
program. Use the navigation keys to select items in the menu and change the settings.  
General help  
At the top right corner of the menu screen is a brief description of the selected item.  
Configuration fields  
These fields show the values for the menu items. If an item is user-configurable, you can  
change the value of the field opposite the item. You cannot select an item that is not  
user-configurable.  
A configurable field is highlighted when selected. To change the value of a field, select it and  
press <Enter> to display a list of options.  
ASUS P8B75-M LX  
2-9  
2.3  
Main menu  
The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup  
program. The Main menu provides you an overview of the basic system information, and  
allows you to set the system date, time, language, and security settings.  
Exit  
UEFI BIOS Utility - Advanced Mode  
Main  
Ai Tweaker  
Advanced  
Monitor  
Boot  
Tool  
BIOS Information  
BIOS Version  
Choose the system default language  
0203 x64  
04/01/2012  
8.0.0.1441  
C1  
Build Date  
ME Version  
South Bridge Stepping  
CPU Information  
Genuine Intel(R) CPU @ 2.90GHz  
Speed  
2900 MHz  
Memory Information  
Total Memory  
1024 MB (DDR3)  
Memory Frequency  
1333 MHz  
System Language  
English  
System Date  
System Time  
Access Level  
[Mon 12/27/2010]  
[16:46:15]  
Administrator  
>
Security  
2.3.1  
System Language [English]  
Allows you to choose the BIOS language version from the options. Configuration options:  
[English]  
[Español] [Русский]  
2.3.2  
System Date [Day xx/xx/xxxx]  
Allows you to set the system date.  
2.3.3  
System Time [xx:xx:xx]  
Allows you to set the system time.  
2.3.4  
Security  
The Security menu items allow you to change the system security settings.  
If you have forgotten your BIOS password, erase the CMOS Real Time Clock (RTC)  
RAM to clear the BIOS password. See section 1.9 Jumpers for information on how to  
erase the RTC RAM.  
The Administrator or User Password items on top of the screen show the default Not  
Installed. After you set a password, these items show Installed.  
2-10  
Chapter 2: BIOS information  
 
Administrator Password  
If you have set an administrator password, we recommend that you enter the administrator  
password for accessing the system. Otherwise, you might be able to see or change only  
selected fields in the BIOS setup program.  
To set an administrator password:  
1.  
2.  
3.  
Select the Administrator Password item and press <Enter>.  
From the Create New Password box, key in a password, then press <Enter>.  
Confirm the password when prompted.  
To change an administrator password:  
1.  
2.  
3.  
4.  
Select the Administrator Password item and press <Enter>.  
From the Enter Current Password box, key in the current password, then press <Enter>.  
From the Create New Password box, key in a new password, then press <Enter>.  
Confirm the password when prompted.  
To clear the administrator password, follow the same steps as in changing an administrator  
password, but press <Enter> when prompted to create/confirm the password. After you clear  
the password, the Administrator Password item on top of the screen shows Not Installed.  
User Password  
If you have set a user password, you must enter the user password for accessing the system.  
The User Password item on top of the screen shows the default Not Installed. After you set  
a password, this item shows Installed.  
To set a user password:  
1.  
2.  
3.  
Select the User Password item and press <Enter>.  
From the Create New Password box, key in a password, then press <Enter>.  
Confirm the password when prompted.  
To change a user password:  
1.  
2.  
3.  
4.  
Select the User Password item and press <Enter>.  
From the Enter Current Password box, key in the current password, then press <Enter>.  
From the Create New Password box, key in a new password, then press <Enter>.  
Confirm the password when prompted.  
To clear the user password, follow the same steps as in changing a user password, but press  
<Enter> when prompted to create/confirm the password. After you clear the password, the  
User Password item on top of the screen shows Not Installed.  
ASUS P8B75-M LX  
2-11  
2.4  
Ai Tweaker menu  
The Ai Tweaker menu items allow you to configure overclocking-related items.  
Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect field  
values can cause the system to malfunction.  
The configuration options for this section vary depending on the CPU and DIMM model you  
installed on the motherboard.  
Scroll down to display the following items:  
Target DRAM Speed : xxxxMHz  
Displays the current DRAM speed.  
2.4.1  
ASUS MultiCore Enhancement [Enabled].  
[Enabled]  
Sets to [Enabled] for maximum performance under XMP/Manual/User-  
defined memory frequency mode.  
[Disabled]  
Set to [Disabled] for default core ratio settings.  
2.4.2  
CPU bus speed: DRAM speed ratio mode [Auto]  
Allows you to set the CPU bus speed to DRAM speed ratio mode. Configuration options:  
[Auto] [100:100] [100:133]  
2-12  
Chapter 2: BIOS information  
 
2.4.3  
Memory Frequency [Auto]  
Allows you to set the memory operating frequency. The configuration options vary with  
the CPU bus speed : DRAM speed ratio mode item settings.  
Selecting a very high memory frequency may cause the system to become unstable! If this  
happens, revert to the default setting.  
2.4.4  
iGPU Max. Frequency [Auto]  
Allows you to set the iGPU maximum frequency. The values range from xxxxMHz (by CPU)  
to 3000MHz with a 50MHz interval. Use <+>/<-> to adjust the value.  
2.4.5  
GPU Boost [OK]  
[OK]  
Select [OK] to automatically optimize the iGPU frequency.  
Select [Cancel] to use a fixed iGPU frequency.  
[Cancel]  
2.4.6  
DRAM Timing Control  
The sub-items in this menu allow you to set the DRAM timing control features. Use the <+>  
and <-> keys to adjust the value. To restore the default setting, type [auto] using the keyboard  
and press <Enter>.  
Changing the values in this menu may cause the system to become unstable! If this  
happens, revert to the default settings.  
2.4.7  
CPU Power Management  
The sub-items in this menu allow you to set the CPU ratio and features.  
CPU Ratio [Auto]  
Allows you to manually adjust the maximum non-turbo CPU ratio. Use <+> and <-> keys or  
the numeric keypad to adjust the value. The valid value ranges vary according to your CPU  
model.  
Enhanced Intel SpeedStep Technology [Enabled]  
Allows you to enable or disable the Enhanced Intel® SpeedStep Technology (EIST).  
[Disabled]  
[Enabled]  
Disables this function.  
The operating system dynamically adjusts the processor voltage and  
core frequency which may result in decreased average consumption and  
decreased average heat production.  
Turbo Mode [Enabled]  
[Enabled]  
Allows processor cores to run faster than marked frequency in specific  
conditions.  
[Disabled]  
Disables this function.  
The first three items of the following appear only when you set the Turbo Mode item to  
[Enabled].  
ASUS P8B75-M LX  
2-13  
 
Long Duration Power Limit [Auto]  
Allows you to limit the turbo ratio’s long duration power.  
Use the <+> and <-> keys to adjust the value.  
Long Duration Maintained [Auto]  
Allows you to maintain the turbo ratio’s long duration power.  
Use the <+> and <-> keys to adjust the value.  
Short Duration Power Limit [Auto]  
Allows you to limit the turbo ratio’s long duration power.  
Use the <+> and <-> keys to adjust the value.  
Primary Plane Current Limit [Auto]  
Maximum instantaneous current allowed at any given time for CPU cores  
Use <+> and <-> key to adjust the value at 0.125A increment.  
Secondary Plane Current Limit [Auto]  
Maximum instantaneous current allowed at any given time for Internal Graphics cores.  
Use <+> and <-> key to adjust the value at 0.125A increment.  
Some of the following items are adjusted by typing the desired values using the numeric  
keypad and press the <Enter> key. You can also use the <+> and <-> keys to adjust the  
value. To restore the default setting, type [auto] using the keyboard and press the <Enter>  
key.  
2.4.8  
CPU Offset Mode Sign [+]  
[+]  
[-]  
To offset the voltage by a positive value.  
To offset the voltage by a negative value.  
CPU Offset Voltage [Auto]  
This item allows you to set the CPU Offset voltage. The values range from 0.005V to 0.315V  
with a 0.005V interval.  
iGPU Offset Voltage [Auto]  
This item allows you to set the iGPU Offset voltage. The values range from 0.005V to 0.315V  
with a 0.005V interval.  
Refer to the CPU documentation before setting the CPU voltage. Setting a high voltage  
may damage the CPU permanently, and setting a low voltage may make the system  
unstable.  
2.4.9  
DRAM Voltage [Auto]  
Allows you to set the DRAM voltage. The values range from 1.30V to 2.13V with a 0.01V  
interval.  
According to Intel CPU specification, DIMMs with voltage requirement over 1.65V may  
damage the CPU permanently. We recommend you install the DIMMs with the voltage  
requirement below 1.65V.  
2-14  
Chapter 2: BIOS information  
 
2.4.10  
VCCSA Voltage [Auto]  
Allows you to set the VCCSA voltage. Use <+> and <-> key to adjust the value at 0.005V  
increment.  
The values of the CPU Offset Voltage, iGPU Offset Voltage, DRAM Voltage and  
VCCSA Voltage items are labeled in different color, indicating the risk levels of high  
voltage settings.  
The system may need better cooling system to work stably under high voltage settings.  
2.4.11  
PCH Voltage [Auto]  
Allows you to set the Platform Controller Hub voltage. Configuration options: [Auto] [+0.05V]  
[+0.10V] [+0.15V]  
ASUS P8B75-M LX  
2-15  
 
2.5  
Advanced menu  
The Advanced menu items allow you to change the settings for the CPU and other system  
devices.  
Be cautious when changing the settings of the Advanced menu items. Incorrect field values  
can cause the system to malfunction.  
Exit  
UEFI BIOS Utility - Advanced Mode  
Main  
Ai Tweaker  
Advanced  
Monitor  
Boot  
Tool  
Trusted Computing (TPM) settings  
>
CPU Configuration  
PCH Configuration  
SATA Configuration  
>
>
>
>
>
>
>
>
System Agent Configuration  
AMT Configuration  
USB Configuration  
Onboard Devices Configuration  
APM  
Network Stack  
→←: Select Screen  
↑↓: Select Item  
Enter: Select  
+/-: Change Opt.  
F1: General Help  
F2: Previous Values  
F3: Shortcut  
F5: Optimized Defaults  
F6: ASUS Ratio Boost  
F10: Save ESC: Exit  
F12: Print Screen  
Version 2.10.1208. Copyright (C) 2012 American Megatrends, Inc.  
2.5.1  
CPU Configuration  
The items in this menu show the CPU-related information that the BIOS automatically  
detects.  
The items shown in submenu may be different due to the CPU you installed.  
Intel Adaptive Thermal Monitor [Enabled]  
[Enabled]  
[Disabled]  
Enables the overheated CPU to throttle its clock speed to cool down.  
Disables the CPU thermal monitor function.  
Active Processor Cores [All]  
Allows you to choose the number of CPU cores to activate in each processor package.  
Configuration options: [All] [1] [2] [3]  
Limit CPUID Maximum [Disabled]  
[Enabled]  
Allows legacy operating systems to boot even without support for CPUs  
with extended CPUID functions.  
[Disabled]  
Disables this function.  
2-16  
Chapter 2: BIOS information  
 
Execute Disable Bit [Enabled]  
[Enabled]  
Enables the No-Execution Page Protection Technology.  
Forces the XD feature flag to always return to zero (0).  
[Disabled]  
Intel® Virtualization Technology [Disabled]  
[Enabled]  
[Disabled]  
Allows a hardware platform to run multiple operating systems separately  
and simultaneously, enabling one system to virtually function as several  
systems.  
Disables this function.  
Hardware Prefetcher [Enabled]  
[Enabled]  
[Disabled]  
Allows a hardware platform to run multiple operating systems separately  
and simultaneously, enabling one system to virtually function as several  
systems.  
Disables this function.  
Adjacent Cache Line Prefetch [Enabled]  
[Enabled]  
[Disabled]  
Allows a hardware platform to perform adjacent cache line prefetching.  
Disables this function.  
CPU Power Management Configuration  
CPU Ratio [Auto]  
Allows you to set the ratio between the CPU Core Clock and the BCLK Frequency. Use <+> and  
<-> keys to adjust the ratio. The valid value ranges vary according to your CPU model.  
Enhanced Intel SpeedStep Technology [Enabled]  
Allows you to enable or disable the Enhanced Intel® SpeedStep Technology (EIST).  
[Disabled]  
[Enabled]  
The CPU runs at its default speed.  
The operating system controls the CPU speed.  
Turbo Mode [Enabled]  
This item allows you to enable or disable the Intel® Turbo Mode Technology.  
[Enabled]  
Allows processor cores to run faster than marked frequency in specific condition.  
[Disabled]  
Disables this function.  
CPU C1E [Auto]  
Enables or disables the C1E support function. This item should be enabled in order to enable the  
Enhanced Halt State. Configuration options: [Auto] [Enabled] [Disabled]  
CPU C3 Report [Auto]  
Allows you to disable or enable the CPU C3 report to OS. Configuration options: [Auto] [Enabled]  
[Disabled]  
CPU C6 Report [Auto]  
Allows you to disable or enable the CPU C6 report to OS. Configuration options: [Auto] [Enabled]  
[Disabled]  
2.5.2  
PCH Configuration  
High Precision Timer [Enabled]  
Allows you to enable or disable the High Precision Event Timer.  
Configuration options: [Enabled] [Disabled]  
ASUS P8B75-M LX  
2-17  
 
Intel® Rapid Start Technology [Disabled]  
Allows you to enable or disable the Intel(R) Rapid Start Technology.  
Configuration options: [Enabled] [Disabled]  
The following three items appear only when you set the Intel(R) Rapid Start Technology  
to [Enabled].  
Entry on S3 RTC Wake [Enabled]  
Allows you to enable or disable the iFFS invocation upon S3 RTC wake. Configuration options:  
[Enabled] [Disabled]  
Entry After [10 Minutes]  
This item appears only when you set the Entry on S3 RTC Wake to [Enabled] and allows you to  
set the RTC wake timer at S3 entry. Configuration options: [Immediately] [1 minute] [2 minute] [5  
minute] [10 minute] [15 minute] [30 minute] [1 hour] [2 hours]  
Active Page Threshold Support [Disbaled]  
Allows you to enable or disable the Active Page Threshold Support. Configuration options:  
[Enabled] [Disabled]  
Active Memory Threshold [x]  
This item appears only when you set the Active Page Threshold Support to [Enabled] and allows  
you to set the Active Memory Threshold. When the partition size is larger than the Active Page  
Threshold size, the system will try to support the Intel(R) Rapid Start Technology. When the item is  
set to zero, the system automatically checks whether the partition size is enough at S3 entry. Key in  
the desired value using the numeric keypad.  
Intel® Smart Connect Technology [Disabled]  
ISCT Configuration [Disabled]  
Allows you to enable or disable the ISCT configuration. Configuration options: [Enabled] [Disabled]  
2.5.3  
SATA Configuration  
While entering Setup, the BIOS automatically detects the presence of SATA devices. The  
SATA Port items show Empty if no SATA device is installed to the corresponding SATA port.  
SATA Mode Selection [IDE]  
Allows you to set the SATA configuration.  
[IDE]  
Set to [IDE] when you want to use the Serial ATA hard disk drives as  
Parallel ATA physical storage devices.  
[AHCI]  
Set to [AHCI] when you want the SATA hard disk drives to use the AHCI  
(Advanced Host Controller Interface). The AHCI allows the onboard storage  
driver to enable advanced Serial ATA features that increases storage  
performance on random workloads by allowing the drive to internally  
optimize the order of commands.  
S.M.A.R.T. Status Check [Enabled]  
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a monitor system. When  
read/write of your hard disk errors occur, this feature allows the hard disk to report warning  
messages during the POST. Configuration options: [Enabled] [Disabled]  
Hot Plug [Disabled]  
This item only appears when you set the SATA Mode Selection item to [AHCI] and allows you  
to enable or disable the hot-plug support for each SATA port. Configuration options: [Enabled]  
[Disabled]  
2-18  
Chapter 2: BIOS information  
 
2.5.4  
System Agent Configuration  
Memory Remap Feature [Enabled]  
[Enabled]  
[Disabled]  
Allow you to enable remapping the memory above 4GB.  
Disables this function.  
Graphics Configuration  
Primary Display [Auto]  
Allows you to decide which graphics controller to use as the primary boot device. Configuration  
options: [Auto] [iGPU] [PCIE] [PCI]  
iGPU Memory [64M]  
Allows you to select the amount of system memory allocated to DVMT 5.0 used by the iGPU.  
Configuration options: [32M] [64M] [96M] [128M] ~ [416M] [448M] [480M] [512M] [1024M]  
Render Standby [Enabled]  
Allows you to enable the Intel Graphics Render Standby support to reduce the iGPU power use  
when idle. Configuration options: [Disabled] [Enabled]  
iGPU Multi-Monitor [Disabled]  
Allows you to enable or disable the iGPU Multi-Monitor. For Lucid Virtu Universal MVP function  
support, set this item to [Enabled] to empower both the integrated and discrete graphic cards. The  
iGPU shared memory size will be fixed at 64MB. Configuration options: [Disabled] [Enabled]  
NB PCIe Configuration  
Allows you to configure the NB PCI Express settings.  
PCIEX16_1 Link Speed [Auto]  
Allows you to configure the PCIE x16_1 speed. Configuration options: [Auto] [Gen1] [Gen2]  
2.5.5  
AMT Configuration  
The items in this menu allow you to change the Intel® Active Management Technology (AMT)  
feature.  
Intel AMT [Enabled]  
Allow you to enable or disable the Intel® Active Management Technology (AMT) in the BIOS  
extension. Configuration options: [Enabled] [Disabled]  
iAMT H/W is always enabled. This option just controls the BIOS extension execution. If  
enabled, this requires additional firmware in the SPI device.  
The following two items become configurable only when you set the Intel AMT item to  
[Enabled].  
Invoke MEBx [Disabled]  
This item become configurable only when the previous item is set to [Enabled] and allows  
you to enable or disable this function. Configuration options: [Enabled] [Disabled]  
Un-Configure ME [Disabled]  
Sets this item to [Disabled] to unconfigure AMT/ME without using a password or set it to  
[Enabled] to use a password. Configuration options: [Enabled] [Disabled]  
ASUS P8B75-M LX  
2-19  
 
WatchDog [Disabled]  
When set to [Enabled], the WatchDog Timer will monitor the time taken for each task  
performed by a software or hardware. Configuration options: [Enabled] [Disabled]  
The following two items become configurable only when you set the WatchDog Timer item  
to [Enabled].  
OS Timer [0]  
Use the <+> and <-> keys to adjust the value or key in a number directly.  
BIOS Timer [0]  
Use the <+> and <-> keys to adjust the value or key in a number directly.  
2.5.6  
USB Configuration  
The items in this menu allow you to change the USB-related features.  
The USB Devices item shows the auto-detected values. If no USB device is detected, the  
item shows None.  
Legacy USB Support [Enabled]  
[Enabled]  
[Disabled]  
[Auto]  
Enables the support for USB devices on legacy operating systems (OS).  
The USB devices can be used only for the BIOS setup program.  
Allows the system to detect the presence of USB devices at startup. If  
detected, the USB controller legacy mode is enabled. If no USB device is  
detected, the legacy USB support is disabled.  
Legacy USB3.0 Support [Enabled]  
This item appears only when you set the Legacy USB Support item to [Enabled].  
[Enabled]  
Enables the support for USB 3.0 devices on legacy operating systems  
(OS).  
[Disabled]  
Disables the function.  
Intel xHCI Mode [Enabled]  
Allows you to select an operation mode for the Intel xHCI controller. Configuration options:  
[Smart Auto] [Auto] [Enabled] [Disabled]  
EHCI Hand-off [Disabled]  
[Enabled]  
Enables the support for operating systems without an EHCI hand-off  
feature.  
[Disabled]  
Disables the function.  
2-20  
Chapter 2: BIOS information  
 
2.5.7  
Onboard Devices Configuration  
HD Audio Controller [Enabled]  
[Enabled]  
Enables the High Definition Audio Controller.  
[Disabled]  
Disables the controller.  
The following item appears only when you set the HD Audio Controller item to [Enabled].  
Front Panel Type [HD]  
Allows you to set the front panel audio connector (AAFP) mode to legacy AC’97 or high-  
definition audio depending on the audio standard that the front panel audio module supports.  
[HD]  
Sets the front panel audio connector (AAFP) mode to high definition audio.  
Sets the front panel audio connector (AAFP) mode to legacy AC’97  
[AC97]  
Realtek LAN Controller [Enabled]  
[Enabled]  
[Disabled]  
Enables the Realtek LAN controller.  
Disables the controller.  
Realtek PXE OPROM [Disabled]  
This item appears only when you set the previous item to [Enabled] and allows you to  
enable or disable the PXE OptionRom of the Realtek LAN controller. Configuration options:  
[Enabled] [Disabled]  
Serial Port Configuration  
The sub-items in this menu allow you to set the serial port configuration.  
Serial Port [Enabled]  
Allows you to enable or disable the serial port (COM). Configuration options: [Enabled] [Disabled]  
Change Settings [IO=3F8h; IRQ=4]  
This item appears only when you set the previous item to [Enabled] and allows you to select the  
Serial Port base address. Configuration options: [IO=3F8h; IRQ=4] [IO=2F8h; IRQ=3] [IO=3E8h;  
IRQ=4] [IO=2E8h; IRQ=3]  
Parallel Port Configuration  
The sub-items in this menu allow you to set the parallel port configuration.  
Parallel Port [Enabled]  
Allows you to enable or disable the parallel port (LPT/LPTE).  
Configuration options: [Enabled] [Disabled]  
The following two items appear only when you set the previous item to [Enabled].  
Change Settings [Auto]  
Allows you to select an optimal setting for Super I/O devices. Configuration options: [Auto]  
[IO=378h; IRQ=5;] [IO=378h; IRQ=5,6,7,9,10,11,12;] [IO=278h; IRQ=5,6,7,9,10,11,12;] [IO=3BCh;  
IRQ=5,6,7,9,10,11,12;]  
Device Mode [STD Printer Mode]  
Allows you to select the Printer Port mode. Configuration options: [STD Printer Mode] [SPP Mode]  
[EPP-1.9 and SPP Mode] [EPP-1.7 and SPP Mode] [ECP Mode] [ECP and EPP 1.9 Mode] [ECP  
and EPP 1.7 Mode]  
ASUS P8B75-M LX  
2-21  
 
2.5.8  
APM  
Restore AC Power Loss [Power Off]  
[Power On]  
[Power Off]  
[Last State]  
The system goes into on state after an AC power loss.  
The system goes into off state after an AC power loss.  
The system goes into either off or on state, whatever the system state was  
before the AC power loss.  
Power On By PS/2 Keyboard [Disabled]  
[Disabled]  
[Space Bar]  
[Ctrl-Esc]  
Disables the Power On by a PS/2 keyboard.  
Sets the Space Bar on the PS/2 keyboard to turn on the system.  
Sets the Ctrl+Esc key on the PS/2 keyboard to turn on the system.  
[Power Key]  
Sets Power key on the PS/2 keyboard to turn on the system. This feature  
requires an ATX power supply that provides at least 1A on the +5VSB lead.  
Power On By PCIE/PCI [Disabled]  
[Disabled]  
[Enabled]  
Disables the PCIE/PCI devices to generate a wake event.  
Enables the PCIE/PCI devices to generate a wake event.  
Power On By Ring [Disabled]  
[Disabled]  
[Enabled]  
Disables Ring to generate a wake event.  
Enables Ring to generate a wake event.  
Power On By RTC [Disabled]  
[Disabled]  
[Enabled]  
Disables RTC to generate a wake event.  
When set to [Enabled], the items RTC Alarm Date (Days) and Hour/  
Minute/Second will become user-configurable with set values.  
2.5.9  
Network Stack  
Network Stack [Disable Link]  
This item allows user to disable or enable the UEFI network stack. Configuration options:  
[Disable Link] [Enable]  
The following two items appear only when you set the previous item to [Enabled].  
Ipv4 PXE Support [Enabled]  
This item allows user to disable or enable the Ipv4 PXE Boot support. Configuration options:  
[Disable Link] [Enable]  
Ipv6 PXE Support [Enabled]  
This item allows user to disable or enable the Ipv6 PXE Boot support. Configuration options:  
[Disable Link] [Enable]  
2-22  
Chapter 2: BIOS information  
 
2.6  
Monitor menu  
The Monitor menu displays the system temperature/power status, and allows you to change  
the fan settings.  
Exit  
EFI BIOS Utility - Advanced Mode  
Main  
Ai Tweaker  
Advanced  
Monitor  
Boot  
Tool  
CPU Temperature  
CPU Temperature  
MB Temperature  
+45ºC / +113ºF  
+34ºC / +93ºF  
3325 RPM  
N/A  
CPU Fan Speed  
Chassis Fan 1 Speed  
CPU Q-Fan Control  
Enabled  
CPU Fan Speed Low Limit  
CPU Fan Profile  
200 RPM  
Standard  
Enabled  
Chassis Q-Fan Control  
Chassis Fan Speed Low Limit  
Chassis Fan Profile  
CPU Voltage  
600 RPM  
Standard  
+1.184 V  
+3.312 V  
+5.080 V  
+12.192 V  
→←: Select Screen  
↑↓: Select Item  
Enter: Select  
+/-: Change Opt.  
F1: General Help  
F2: Previous Values  
F3: Shortcut  
3.3V Voltage  
F5: Optimized Defaults  
F6: ASUS Ratio Boost  
F10: Save ESC: Exit  
F12: Print Screen  
5V Voltage  
12V Voltage  
Version 2.10.1208. Copyright (C) 2012 American Megatrends, Inc.  
Scroll down to display the following items:  
Anti Surge Support  
Enabled  
Version 2.10.1208. Copyright (C) 2012 American Megatrends, Inc.  
ASUS P8B75-M LX  
2-23  
 
2.6.1  
CPU Temperature / MB Temperature [xxxºC/xxxºF]  
The onboard hardware monitor automatically detects and displays the CPU and motherboard  
temperatures. Select Ignore if you do not wish to display the detected temperatures.  
2.6.2  
CPU / Chassis Fan Speed [xxxx RPM] or [Ignore] / [N/A]  
The onboard hardware monitor automatically detects and displays the CPU and chassis fan  
speeds in rotations per minute (RPM). If the fan is not connected to the motherboard, the field  
shows N/A. Select Ignore if you do not wish to display the detected speed.  
2.6.3  
CPU Q-Fan Control [Enabled]  
Disables the CPU Q-Fan control feature.  
Enables the CPU Q-Fan control feature.  
[Disabled]  
[Enabled]  
CPU Fan Speed Low Limit [200 RPM]  
This item appears only when you enable the CPU Q-Fan Control feature and allows you to  
disable or set the CPU fan warning speed.  
Configuration options: [Ignore] [100 RPM] [200 RPM] [300 RPM] [400 RPM] [500 RPM]  
CPU Fan Profile [Standard]  
This item appears only when you enable the CPU Q-Fan Control feature and allows you to set the  
appropriate performance level of the CPU fan.  
[Standard]  
Sets to [Standard] to make the CPU fan automatically adjust depending on the CPU  
temperature.  
[Silent]  
[Turbo]  
[Manual]  
Sets to [Silent] to minimize the fan speed for quiet CPU fan operation.  
Sets to [Turbo] to achieve maximum CPU fan speed.  
Sets to [Manual] to assign detailed fan speed control parameters.  
The following four items appear only when you set CPU Fan Profile to [Manual].  
CPU Upper Temperature [70]  
Use the <+> and <-> keys to adjust the upper limit of the CPU temperature. The values range  
from 20ºC to 75ºC.  
CPU Fan Max. Duty Cycle(%) [100]  
Use the <+> and <-> keys to adjust the maximum CPU fan duty cycle. The values range from  
20% to 100%. When the CPU temperature reaches the upper limit, the CPU fan will operate at  
the maximum duty cycle.  
CPU Lower Temperature [20]  
Use the <+> and <-> keys to adjust the lower limit of the CPU temperature. The values range  
from 20ºC to 75ºC.  
CPU Fan Min. Duty Cycle(%) [20]  
Use the <+> and <-> keys to adjust the minimum CPU fan duty cycle. The values range from 0%  
to 100%. When the CPU temperature is under 40ºC, the CPU fan will operate at the minimum  
duty cycle.  
2-24  
Chapter 2: BIOS information  
 
2.6.4  
Chassis Q-Fan Control [Enabled]  
Disables the Chassis Q-Fan control feature.  
Enables the Chassis Q-Fan control feature.  
[Disabled]  
[Enabled]  
Chassis Fan Speed Low Limit [600 RPM]  
This item appears only when you enable the Chassis Q-Fan Control feature and allows you  
to disable or set the chassis fan warning speed.  
Configuration options: [Ignore] [200 RPM] [300 RPM] [400 RPM] [500 RPM] [600 RPM]  
Chassis Fan Profile [Standard]  
This item appears only when you enable the Chassis Q-Fan Control feature and allows you to set  
the appropriate performance level of the chassis fan.  
[Standard]  
Sets to [Standard] to make the chassis fan automatically adjust depending on the  
chassis temperature.  
[Silent]  
[Turbo]  
[Manual]  
Sets to [Silent] to minimize the fan speed for quiet chassis fan operation.  
Sets to [Turbo] to achieve maximum chassis fan speed.  
Sets to [Manual] to assign detailed fan speed control parameters.  
The following four items appear only when you set Chassis Fan Profile to [Manual].  
Chassis Upper Temperature [70]  
Use the <+> and <-> keys to adjust the upper limit of the chassis temperature. The values range  
from 40ºC to 90ºC.  
Chassis Fan Max. Duty Cycle(%) [100]  
Use the <+> and <-> keys to adjust the maximum chassis fan duty cycle. The values range  
from 60% to 100%. When the chassis temperature reaches the upper limit, the chassis fan will  
operate at the maximum duty cycle.  
Chassis Lower Temperature [40]  
Displays the lower limit of the chassis temperature.  
CPU Fan Min. Duty Cycle(%) [60]  
Use the <+> and <-> keys to adjust the minimum chassis fan duty cycle. The values range from  
60% to 100%. When the chassis temperature is under 40ºC, the chassis fan will operate at the  
minimum duty cycle.  
2.6.5  
CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage  
The onboard hardware monitor automatically detects the voltage output through the onboard  
voltage regulators. Select Ignore if you do not want to detect this item.  
2.6.6  
Anti Surge Support [Enabled]  
This item allows you to enable or disable the Anti Surge function.  
Configuration options: [Disabled] [Enabled]  
ASUS P8B75-M LX  
2-25  
 
2.7  
Boot menu  
The Boot menu items allow you to change the system boot options.  
Exit  
UEFI BIOS Utility - Advanced Mode  
Main  
Ai Tweaker  
Advanced  
Monitor  
Boot  
Tool  
Select the keyboard NumLock state  
Bootup NumLock State  
Full Screen Logo  
On  
Enabled  
Enabled  
Wait For ‘F1’ If Error  
Option ROM Messages  
Setup Mode  
Force BIOS  
EZ Mode  
UEFI/Legacy Boot  
PCI ROM Priority  
Enabled both...  
Legacy ROM  
Boot Option Priorities  
Boot Option #1  
SATA: xxxxxxx  
SATA: xxxxxxx  
→←: Select Screen  
↑↓: Select Item  
Enter: Select  
Boot Option #2  
+/-: Change Opt.  
F1: General Help  
F2: Previous Values  
F3: Shortcut  
Boot Override  
>
>
>
SATA: xxxxxxxxxxxx  
F5: Optimized Defaults  
F6: ASUS Ratio Boost  
F10: Save ESC: Exit  
F12: Print Screen  
Hard Drive BBS Priorities  
CD/DVD ROM Drive BBS Priorities  
Version 2.10.1208. Copyright (C) 2012 American Megatrends, Inc.  
2.7.1  
[On]  
Bootup NumLock State [On]  
Sets the power-on state of the NumLock to [On].  
Sets the power-on state of the NumLock to [Off].  
[Off]  
2.7.2  
Full Screen Logo [Enabled]  
[Enabled]  
[Disabled]  
Enables the full screen logo display feature.  
Disables the full screen logo display feature.  
Set this item to [Enabled] to use the ASUS MyLogo 2™ feature.  
Post Report [5 sec]  
This item appears only when the Full Screen Logo item is set to [Disabled] and allows you to  
set the waiting time for the system to display the post report. Configuration options: [1 sec] [2  
sec] [3 sec] [4 sec] [5 sec] [6 sec] [7 sec] [8 sec] [9 sec] [10 sec] [Until Press ESC]  
2.7.3  
Wait for ‘F1’ If Error [Enabled]  
When this item is set to [Enabled], the system waits for the F1 key to be pressed when error  
occurs. Configuration options: [Disabled] [Enabled]  
2-26  
Chapter 2: BIOS information  
 
2.7.4  
Option ROM Messages [Force BIOS]  
[Force BIOS]  
The third-party ROM messages will be forced to display during the boot  
sequence.  
[Keep Current] The third-party ROM messages will be displayed only if the third-party  
manufacturer had set the add-on device to do so.  
2.7.5  
Setup Mode [EZ Mode]  
[Advanced Mode] Sets Advanced Mode as the default screen for entering the BIOS setup  
program.  
[EZ Mode]  
Sets EZ Mode as the default screen for entering the BIOS setup program.  
2.7.6  
UEFI/Legacy Boot [Enabled both UEFI and Legacy]  
[Enable both UEFI and Legacy] Enables both UEFI and Legacy boot.  
[Disable UEFI]  
Enables the Legacy boot, and disables the UEFI boot.  
Enables the UEFI booth, and disables the Legacy boot.  
[Disable Legacy]  
2.7.7  
PCI ROM Priority [Legacy ROM]  
[Legacy ROM]  
Launch Legacy ROM  
[EFI Compatibe ROM] Launch UEFI Compatible ROM  
2.7.8  
Boot Option Priorities  
These items specify the boot device priority sequence from the available devices. The  
number of device items that appears on the screen depends on the number of devices  
installed in the system.  
To select the boot device during system startup, press <F8> when ASUS Logo appears.  
To access Windows OS in Safe Mode, press <F8> after POST.  
2.7.9  
Boot Override  
These items displays the available devices. The number of device items that appears on  
the screen depends on the number of devices installed in the system. Click an item to start  
booting from the selected device.  
ASUS P8B75-M LX  
2-27  
 
2.8  
Tools menu  
The Tools menu items allow you to configure options for special functions. Select an item  
then press <Enter> to display the submenu.  
Exit  
UEFI BIOS Utility - Advanced Mode  
Main  
Ai Tweaker  
Advanced  
Monitor  
Boot  
Tool  
Be used to update BIOS  
>
>
>
ASUS EZ Flash 2 Utility  
ASUS O.C. Profile  
ASUS SPD Information  
2.8.1  
ASUS EZ Flash 2 Utility  
Allows you to run ASUS EZ Flash 2. Press [Enter] to launch the ASUS EZ Flash 2 screen.  
For more details, see section 2.1.2 ASUS EZ Flash 2.  
2.8.2  
ASUS O.C. Profile  
This item allows you to store or load multiple BIOS settings.  
The Setup Profile Status items show Not Installed if no profile is created.  
Label  
Allows you to input the label of the setup profile.  
Save to Profile  
Allows you to save the current BIOS settings to the BIOS Flash, and create a profile. Key in a  
profile number from one to eight, press <Enter>, and then select Yes.  
Load from Profile  
Allows you to load the previous BIOS settings saved in the BIOS Flash. Key in the profile  
number that saved your CMOS settings, press <Enter>, and then select Yes.  
DO NOT shut down or reset the system while updating the BIOS to prevent the system  
boot failure!  
We recommend that you update the BIOS file only coming from the same memory/CPU  
configuration and BIOS version.  
2.8.3  
ASUS SPD Information  
DIMM Slot # [Slot 1]  
Displays the Serial Presence Detect (SPD) information of the DIMM module installed on the  
selected slot. Configuration options: [DIMM_A1] [DIMM_B1]  
2-28  
Chapter 2: BIOS information  
 
2.9  
Exit menu  
The Exit menu items allow you to load the optimal default values for the BIOS items, and  
save or discard your changes to the BIOS items. You can access the EZ Mode from the Exit  
menu.  
Exit  
Load Optimized Defaults  
Save Changes & Reset  
Discard Changes & Exit  
ASUS EZ Mode  
Launch EFI Shell from filesystem device  
Load Optimized Defaults  
This option allows you to load the default values for each of the parameters on the Setup  
menus. When you select this option or if you press <F5>, a confirmation window appears.  
Select Yes to load the default values.  
Save Changes & Reset  
Once you are finished making your selections, choose this option from the Exit menu to  
ensure the values you selected are saved. When you select this option or if you press <F10>,  
a confirmation window appears. Select Yes to save changes and exit.  
Discard Changes & Exit  
This option allows you to exit the Setup program without saving your changes. When you  
select this option or if you press <Esc>, a confirmation window appears. Select Yes to  
discard changes and exit.  
ASUS EZ Mode  
This option allows you to enter the EZ Mode screen.  
Launch EFI Shell from filesystem device  
This option allows you to attempt to launch the EFI Shell application (shellx64.efi) from one of  
the available devices that have a filesystem.  
ASUS P8B75-M LX  
2-29  
 
2-30  
Chapter 2: BIOS information  
Appendices  
Notices  
Federal Communications Commission Statement  
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two  
conditions:  
This device may not cause harmful interference.  
This device must accept any interference received including interference that may cause  
undesired operation.  
This equipment has been tested and found to comply with the limits for a Class B digital  
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference in a residential installation. This  
equipment generates, uses and can radiate radio frequency energy and, if not installed  
and used in accordance with manufacturer’s instructions, may cause harmful interference  
to radio communications. However, there is no guarantee that interference will not occur  
in a particular installation. If this equipment does cause harmful interference to radio or  
television reception, which can be determined by turning the equipment off and on, the user  
is encouraged to try to correct the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment to an outlet on a circuit different from that to which the receiver is  
connected.  
Consult the dealer or an experienced radio/TV technician for help.  
The use of shielded cables for connection of the monitor to the graphics card is required  
to assure compliance with FCC regulations. Changes or modifications to this unit not  
expressly approved by the party responsible for compliance could void the user’s authority  
to operate this equipment.  
IC: Canadian Compliance Statement  
Complies with the Canadian ICES-003 Class B specifications. This device complies with RSS  
210 of Industry Canada. This Class B device meets all the requirements of the Canadian  
interference-causing equipment regulations.  
This device complies with Industry Canada license exempt RSS standard(s). Operation is  
subject to the following two conditions: (1) this device may not cause interference, and (2)  
this device must accept any interference, including interference that may cause undesired  
operation of the device.  
Cut appareil numérique de la Classe B est conforme à la norme NMB-003 du Canada.  
Cet appareil numérique de la Classe B respecte toutes les exigences du Règlement sur le  
matériel brouilleur du Canada.  
Cet appareil est conforme aux normes CNR exemptes de licence d’Industrie Canada. Le  
fonctionnement est soumis aux deux conditions suivantes :  
(1) cet appareil ne doit pas provoquer d’interférences et  
(2) cet appareil doit accepter toute interférence, y compris celles susceptibles de provoquer  
un fonctionnement non souhaité de l’appareil.  
ASUS P8B75-M LX  
A-1  
 
Canadian Department of Communications Statement  
This digital apparatus does not exceed the Class B limits for radio noise emissions from  
digital apparatus set out in the Radio Interference Regulations of the Canadian Department  
of Communications.  
This class B digital apparatus complies with Canadian ICES-003.  
VCCI: Japan Compliance Statement  
VCCI Class B Statement  
KC: Korea Warning Statement  
REACH  
Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of  
Chemicals) regulatory framework, we published the chemical substances in our products at  
DO NOT throw the motherboard in municipal waste. This product has been designed to  
enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin  
indicates that the product (electrical and electronic equipment) should not be placed in  
municipal waste. Check local regulations for disposal of electronic products.  
DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol  
of the crossed out wheeled bin indicates that the battery should not be placed in municipal  
waste.  
ASUS Recycling/Takeback Services  
ASUS recycling and takeback programs come from our commitment to the highest standards for  
protecting our environment. We believe in providing solutions for you to be able to responsibly  
recycle our products, batteries, other components as well as the packaging materials. Please  
go to http://csr.asus.com/english/Takeback.htm for the detailed recycling information in different  
regions.  
A-2  
Appendices  
ASUS contact information  
ASUSTeK COMPUTER INC.  
Address  
Telephone  
Fax  
E-mail  
Web site  
15 Li-Te Road, Peitou, Taipei, Taiwan 11259  
+886-2-2894-3447  
+886-2-2890-7798  
Technical Support  
Telephone  
Online support  
+86-21-38429911  
support.asus.com  
ASUS COMPUTER INTERNATIONAL (America)  
Address  
Telephone  
Fax  
800 Corporate Way, Fremont, CA 94539, USA  
+1-812-282-3777  
+1-510-608-4555  
usa.asus.com  
Web site  
Technical Support  
Telephone  
Support fax  
+1-812-282-2787  
+1-812-284-0883  
support.asus.com  
Online support  
ASUS COMPUTER GmbH (Germany and Austria)  
Address  
Fax  
Harkort Str. 21-23, D-40880 Ratingen, Germany  
+49-2102-959911  
Web site  
Online contact  
Technical Support  
Telephone  
Support Fax  
+49-1805-010923*  
+49-2102-9599-11  
support.asus.com  
Online support  
* EUR 0.14/minute from a German fixed landline; EUR 0.42/minute from a mobile phone.  
ASUS P8B75-M LX  
A-3  
 
A-4  
Appendices  

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