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P8B75-M LX PLUSMotherboard
E7517
First Edition
July 2012
Copyright © 2012 ASUSTeK COMPUTER INC. All Rights Reserved.
No part of this manual, including the products and software described in it, may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language in any form or by any means, except documentation kept by the purchaser for backup purposes, without the express written permission of ASUSTeK COMPUTER INC. (“ASUS”).
Product warranty or service will not be extended if: (1) the product is repaired, modified or altered, unless such repair, modification of alteration is authorized in writing byASUS; or (2) the serial number of the product is defaced or missing.
ASUS PROVIDES THIS MANUAL “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ASUS, ITS DIRECTORS, OFFICERS, EMPLOYEES OR AGENTS BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA, INTERRUPTION OF BUSINESS AND THE LIKE), EVEN IF ASUS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES ARISING FROM ANY DEFECT OR ERROR IN THIS MANUAL OR PRODUCT.
SPECIFICATIONS AND INFORMATION CONTAINED IN THIS MANUAL ARE FURNISHED FOR INFORMATIONAL USE ONLY, AND ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE, AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY ASUS. ASUS ASSUMES NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR INACCURACIES THAT MAY APPEAR IN THIS MANUAL, INCLUDING THE PRODUCTS AND SOFTWARE DESCRIBED IN IT.
Products and corporate names appearing in this manual may or may not be registered trademarks or copyrights of their respective companies, and are used only for identification or explanation and to the owners’ benefit, without intent to infringe.
Offer to Provide Source Code of Certain Software
This product contains copyrighted software that is licensed under the General Public License (“GPL”), under the Lesser General Public License Version (“LGPL”) and/or other Free Open Source Software Licenses. Such software in this product is distributed without any warranty to the extent permitted by the applicable law. Copies of these licenses are included in this product.
Where the applicable license entitles you to the source code of such software and/or other additional data, you may obtain it for a period of three years after our last shipment of the product, either
(1)for free by downloading it from http://support.asus.com/download
or
(2)for the cost of reproduction and shipment, which is dependent on the preferred carrier and the location where you want to have it shipped to, by sending a request to:
ASUSTeK Computer Inc.
Legal Compliance Dept.
15 Li Te Rd.,
Beitou, Taipei 112
Taiwan
In your request please provide the name, model number and version, as stated in the About Box of the product for which you wish to obtain the corresponding source code and your contact details so that we can coordinate the terms and cost of shipment with you.
The source code will be distributed WITHOUT ANY WARRANTY and licensed under the same license as the corresponding binary/object code.
This offer is valid to anyone in receipt of this information.
ASUSTeK is eager to duly provide complete source code as required under various Free Open Source Software licenses. If however you encounter any problems in obtaining the full corresponding source code we would be much obliged if you give us a notification to the email address gpl@asus.com, stating the product and describing the problem (please DO NOT send large attachments such as source code archives, etc. to this email address).
ii
Contents
Safety information....................................................................................... |
vi |
About this guide.......................................................................................... |
vi |
P8B75-M LX PLUS specifications summary........................................... |
viii |
Product introduction
1.1 |
Special features............................................................................ |
1-1 |
|
|
1.1.1 |
Product highlights ............................................................ |
1-1 |
|
1.1.2 |
ASUS Exclusive features ................................................. |
1-2 |
1.2 |
Before you proceed...................................................................... |
1-5 |
|
1.3 |
Motherboard overview................................................................. |
1-5 |
|
|
1.3.1 |
Placement direction ......................................................... |
1-5 |
|
1.3.2 |
Screw holes ..................................................................... |
1-6 |
|
1.3.3 |
Motherboard layout .......................................................... |
1-7 |
|
1.3.4 |
Layout contents . .............................................................. |
1-8 |
1.4 |
Central Processing Unit (CPU).................................................... |
1-9 |
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|
1.4.1 |
Installing the CPU .......................................................... |
1-10 |
|
1.4.2 |
CPU heatsink and fan assembly installation ................. |
1-12 |
1.5 |
System memory.......................................................................... |
1-14 |
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|
1.5.1 |
Overview ........................................................................ |
1-14 |
|
1.5.2 |
Memory configurations . ................................................. |
1-14 |
|
1.5.3 |
Installing a DIMM ........................................................... |
1-20 |
|
1.5.4 |
Removing a DIMM ......................................................... |
1-20 |
1.6 |
Expansion slots.......................................................................... |
1-21 |
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|
1.6.1 |
Installing an expansion card .......................................... |
1-21 |
|
1.6.2 |
Configuring an expansion card ...................................... |
1-21 |
|
1.6.3 |
PCI slot .......................................................................... |
1-21 |
|
1.6.4 |
PCI Express 2.0 x1 slots ............................................... |
1-21 |
1.7 |
Jumpers |
....................................................................................... |
1-22 |
|
1.6.5 ....................................... |
PCI Express 3.0/2.0 x16 slots |
1-22 |
1.8 |
Connectors.................................................................................. |
1-23 |
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|
1.8.1 .................................................. |
Rear panel connectors |
1-23 |
|
1.8.2 ........................................................ |
Internal connectors |
1-25 |
1.9 |
Onboard .............................................................................LEDs |
1-32 |
|
iii
Contents
1.10 Software support........................................................................ |
1-33 |
|
1.10.1 Installing an operating system....................................... |
1-33 |
|
1.10.2 |
Support DVD information............................................... |
1-33 |
1.10.3 |
Intel® SBA support ........................................................ |
1-34 |
BIOS information
2.1 |
Managing and updating your BIOS............................................. |
2-1 |
|
|
2.1.1 |
ASUS Update utility......................................................... |
2-1 |
|
2.1.2 |
ASUS EZ Flash 2............................................................ |
2-2 |
|
2.1.3 |
ASUS CrashFree BIOS 3 utility....................................... |
2-3 |
|
2.1.4 |
ASUS BIOS Updater....................................................... |
2-4 |
2.2 |
BIOS setup program..................................................................... |
2-6 |
|
|
BIOS menu screen......................................................................... |
2-7 |
|
2.3 |
Main menu................................................................................... |
2-10 |
|
|
2.3.1 |
System Language [English]........................................... |
2-10 |
|
2.3.2 |
System Date [Day xx/xx/xxxx]....................................... |
2-10 |
|
2.3.3 |
System Time [xx:xx:xx].................................................. |
2-10 |
|
2.3.4 |
Security.......................................................................... |
2-10 |
2.4 |
Ai Tweaker menu........................................................................ |
2-12 |
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|
2.4.1 |
ASUS MultiCore Enhancement [Enabled]..................... |
2-12 |
|
2.4.2 |
Memory Frequency [Auto]............................................. |
2-12 |
|
2.4.3 |
GPU Boost [OK]............................................................ |
2-13 |
|
2.4.4 |
DRAM Timing Control.................................................... |
2-13 |
|
2.4.5 |
CPU Power Management.............................................. |
2-16 |
2.5 |
Advanced menu.......................................................................... |
2-17 |
|
|
2.5.1 |
CPU Configuration......................................................... |
2-18 |
|
2.5.2 |
PCH Configuration......................................................... |
2-19 |
|
2.5.3 |
SATAConfiguration........................................................ |
2-20 |
|
2.5.4 |
SystemAgent Configuration.......................................... |
2-21 |
|
2.5.5 |
AMT Configuration......................................................... |
2-22 |
|
2.5.6 |
USB Configuration......................................................... |
2-23 |
|
2.5.7 |
Onboard Devices Configuration.................................... |
2-24 |
|
2.5.8 |
APM............................................................................... |
2-25 |
|
2.5.9 |
Network Stack............................................................... |
2-25 |
iv
Contents
2.6 |
Monitor menu.............................................................................. |
2-26 |
|
|
2.6.1 |
CPU Temperature / MB Temperature [xxxºC/xxxºF]...... |
2-26 |
|
2.6.2 |
CPU / Chassis / Power Fan Speed .............................. |
2-26 |
|
2.6.3 |
CPU Q-Fan Control [Enabled]....................................... |
2-27 |
|
2.6.4 |
Chassis Q-Fan Control [Enabled].................................. |
2-27 |
|
2.6.5 |
CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage... |
2-28 |
|
2.6.6 |
Anti Surge Support [Enabled]........................................ |
2-28 |
2.7 |
Boot menu................................................................................... |
2-29 |
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|
2.7.1 |
Bootup NumLock State [On].......................................... |
2-29 |
|
2.7.2 |
Full Screen Logo [Enabled]........................................... |
2-29 |
|
2.7.3 |
Wait for ‘F1’ If Error [Enabled]....................................... |
2-30 |
|
2.7.4 |
Option ROM Messages [Force BIOS]........................... |
2-30 |
|
2.7.5 |
Setup Mode [EZ Mode].................................................. |
2-30 |
|
2.7.6 |
UEFI/Legacy Boot [Enabled both UEFI and Legacy].... |
2-30 |
|
2.7.7 |
PCI ROM Priority [Legacy ROM]................................... |
2-30 |
|
2.7.8 |
Boot Option Priorities..................................................... |
2-30 |
|
2.7.9 |
Boot Override................................................................ |
2-30 |
2.8 |
Tools menu.................................................................................. |
2-31 |
|
|
2.8.1 |
ASUS EZ Flash 2 Utility................................................. |
2-31 |
|
2.8.2 |
ASUS O.C. Profile......................................................... |
2-31 |
|
2.8.3 |
ASUS SPD Information................................................. |
2-31 |
2.9 |
Exit menu..................................................................................... |
2-32 |
|
Appendices
Notices....................................................................................................... |
A-1 |
ASUS contact information........................................................................ |
A-3 |
Safety information
Electrical safety
•To prevent electrical shock hazard, disconnect the power cable from the electrical 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 components, carefully read all the manuals that came with the package.
•Before using the product, ensure 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 be exposed to moisture.
•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. It includes descriptions of the switches, jumpers, and connectors on the motherboard.
•Chapter 2: BIOS information
This chapter discusses changing system settings through the BIOS Setup menus. Detailed descriptions fo the BIOS parameters are also provided.
vi
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.
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 completing a task.
CAUTION: Information to prevent damage to the components when completing a task
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Typography
Bold text |
Indicates a menu or an item to select. |
Italics |
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 (+). |
vii
P8B75-M LX PLUS specifications summary
CPU |
LGA1155 socket for Intel® 3rd / 2nd Generation Core™ i7 / i5 / i3 / Pentium® |
|
|
/ Celeron® 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. |
|
Chipset |
** Refer to www.asus.com for Intel® CPU support list. |
|
Intel® B75 Express Chipset |
|
|
Memory |
2 x DIMM, max. 16GB, DDR3 2200(O.C.) / 2000(O.C.) /1800 (O.C.) / 1600 / |
|
|
1333 / 1066 MHz, non-ECC, un-buffered memory |
|
|
Dual-channel memory architecture |
|
Graphics
Expansion slots
Storage
LAN
Audio
USB
*Refer to www.asus.com for the latest Memory QVL (Qualified 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.
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 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 Gigabit LAN controller
6+2 Channels Realtek® ALC887-VD High DefinitionAudio 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.
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 PLUS specifications summary
ASUS unique features ASUS Exclusive Features:
-ASUS GPU Boost
-ASUS USB 3.0 Boost
-Network iControl
-ASUS AI Suite II
-AI Charger
-ASUS Anti-Surge Protection
-ASUS UEFI BIOS
ASUS Quiet Thermal Solution:
- ASUS Fan Xpert
ASUS EZ DIY:
-ASUS CrashFree BIOS 3
-ASUS EZ Flash 2
-ASUS MyLogo 2™
Other features
- 100% All high-quality conductive polymer capacitors 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
3 x Audio jacks
Internal connectors/ 1 x USB 3.0 connector supports additional 2 USB 3.0 ports switches/ buttons 2 x USB 2.0 connectors support additional 4 USB 2.0 ports
5 x SATA 3.0 Gb/s connectors
1 x SATA 6.0 Gb/s connector
1 x CPU fan connector
1 x Chassis fan connectors
1 x Front panel audio connector (AAFP)
1 x System panel connector
1 x Speaker connector
1 x 24-pin ATX power connector
1 x 4-pin ATX 12V power connector
(continued on the next page)
ix
P8B75-M LX PLUS specifications summary
BIOS features
Manageability
Accessories
Support DVD
Form factor
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
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 Drivers
ASUS utilities ASUS Update
Anti-virus software (OEM version)
MicroATX form factor: 9.6”x 6.9” (24.4cm x 17.5cm)
* Specifications are subject to change without notice.
Product introduction |
1 |
1.1Special features
1.1.1Product 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 (2 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.
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(O.C.) / 1866(O.C.) /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(O.
C.) / 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.
ASUS P8B75-M LX PLUS |
1-1 |
1.1.2ASUS Exclusive features
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.
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 frequently accessed settings.
-ASUS DRAM SPD (Serial Presence Detect) information for accessing memory information, detecting faulty DIMMs, and helping with difficult
POST situations.
1-2 |
Chapter 1: Product introduction |
Ai Charger
Ai Charger is a unique fast-charging software which supports iPods, iPhones, and iPads.
* Check your USB mobile device manufacturer if it fully supports the BC 1.1 function.
**The actual charging speed may vary with your USB device’s conditions.
USB 3.0 Boost
With USB 3.0 Boost technology, a USB device’s transmission speed is significantly increased, adding to an already impressive 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 MyLogo 2™
Personalize your system by turning your favorite photos into 256-color boot logos.
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 a USB flash disk that contains the BIOS file.
ASUS P8B75-M LX PLUS |
1-3 |
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.
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 at 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 Anti-Surge Protection
This special design prevents expensive devices and the motherboard from damage caused by power surges from switching power supply (PSU).
C.P.R. (CPU Parameter Recall)
The BIOS C.P.R. feature automatically restores CPU default settings when the system crashes 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
This motherboard is European Union´s Energy-related Products (ErP) ready, and ErP requires products to meet certain energy efficiency requirements with regard to energy consumption. This is in line with
ASUS’ vision of creating environment-friendly and energy-efficient products through product design and innovation aimed at reducing carbon footprint and mitigating environmental impact.
1-4 |
Chapter 1: Product introduction |
1.2Before 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.
1.3Motherboard overview
Before you install the motherboard, study the configuration of your chassis to ensure that the motherboard fits.
Unplug the power cord before installing or removing the motherboard. Failure to do so can cause you physical injury and damage to motherboard components.
1.3.1Placement direction
When installing the motherboard, 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.
ASUS P8B75-M LX PLUS |
1-5 |
1.3.2Screw 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 PLUS
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1-6 |
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Chapter 1: Product introduction |
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1.3.3Motherboard layout
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17.5cm(6.9in) |
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KBMS_USB34 |
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CPU_FAN |
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DVI |
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ATX12V |
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VGA |
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LGA1155 |
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(64bit, 240-pin module) |
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DIMM A1 |
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USB3_12 |
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DDR3 |
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24.4cm(9.6in) |
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Lithium Cell |
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EATXPWR |
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CMOS Power |
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AUDIO |
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CHA_FAN |
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PCIEX16_1 |
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RTL |
P8B75-M LX PLUS |
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PCIEX1_1 |
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BIOS |
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Intel® |
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PCI1 |
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ALC |
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USB56 |
USB78 |
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DRCT |
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CLRTC |
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F_PANEL |
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ASUS P8B75-M LX PLUS |
1-7 |
1.3.4Layout contents
Connectors/Jumpers/Slots/LED |
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1. |
CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN) |
1-27 |
2. |
ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) |
1-26 |
3. |
Intel® LGA1155 CPU socket |
1-9 |
4. |
DDR3 DIMM slots |
1-14 |
5. |
Intel® B75 Serial ATA 3.0Gb/s connectors (7-pin SATA3G_1~5 [blue]) |
1-29 |
6. |
Intel® B75 Serial ATA 6.0Gb/s connectors (7-pin SATA6G_1 [gray]) |
1-30 |
7. |
Onboard LED (SB_PWR) |
1-32 |
8. |
Speaker connector (4-pin SPEAKER) |
1-29 |
9. |
System panel connector (10-1 pin F_PANEL) |
1-28 |
10. |
USB 3.0 connector (20-1 pin USB3_34) |
1-30 |
11. |
DRCT Connector |
1-31 |
12. |
USB 2.0 connectors (10-1 pin USB56, USB78) |
1-31 |
13. |
Clear RTC RAM (3-pin CLRTC) |
1-22 |
14. |
Front panel audio connector (10-1 pin AAFP) |
1-25 |
1-8 |
Chapter 1: Product introduction |
1.4Central Processing Unit (CPU)
This motherboard comes with a surface mount LGA1155 socket designed for the Intel 3rd/2nd generation Core™ i7 / Core™ i5 / Core™ i3 / Pentium® / Celeron® processors.
P8B75-M LX PLUS
P8B75-M LX PLUS 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.
ASUS P8B75-M LX PLUS |
1-9 |
1.4.1Installing the CPU
The LGA1156 CPU is incompatible with the LGA1155 socket. DO NOT install a LGA1156 CPU on the LGA1155 socket.
1
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1-10 |
Chapter 1: Product introduction |
4 C
A
5
ASUS P8B75-M LX PLUS |
1-11 |
1.4.2CPU 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
1 A
2
B
B
A
3 |
4 |
1-12 |
Chapter 1: Product introduction |
To uninstall the CPU heatsink and fan assembly
1
2
A 
B
B
A 
ASUS P8B75-M LX PLUS |
1-13 |
1.5System memory
1.5.1Overview
This motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Module (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:
P8B75-M LX PLUS
DIMM_A1 DIMM_B1
Channel |
Sockets |
Channel A |
DIMM_A1 |
Channel B |
DIMM_B1 |
P8B75-M LX PLUS 240-pin DDR3 DIMM sockets
1.5.2Memory 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 ChannelAand 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 optimal compatibility, we recommend that you install memory modules of the same version or date code (D/C) from the same vendor. Check with the retailer to get the correct memory modules.
•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 if you want to install 4GB or more on the motherboard.
1-14 |
Chapter 1: Product introduction |
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