P8B75-M LX

Second Edition (V2)

August 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

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

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

(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:

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 notication to the email address [email protected], stating

the product and describing the problem (please DO NOT send large attachments such as source code

archives, etc. to this email address).

1.1 Welcome! ...................................................................................... 1-1

1.2 Package contents ......................................................................... 1-1

1.3 Special features ............................................................................ 1-1

1.3.1 Product highlights ........................................................... 1-1

1.3.2 Innovative ASUS features ............................................... 1-3

1.4 Before you proceed ..................................................................... 1-5

1.5 Motherboard overview ................................................................. 1-6

1.5.1 Placement direction ........................................................ 1-6

1.5.2 Screw holes .................................................................... 1-6

1.5.3 Motherboard layout ......................................................... 1-7

1.7.2 Memory congurations .................................................. 1-13

1.7.3 Installing a DIMM .......................................................... 1-20

1.7.4 Removing a DIMM ........................................................ 1-20

1.8 Expansion slots .......................................................................... 1-21

1.8.1 Installing an expansion card ......................................... 1-21

1.8.2 Conguring an expansion card ..................................... 1-21

1.8.3 PCI slot ......................................................................... 1-21

1.8.4 PCI Express 2.0 x1 slots ............................................... 1-21

1.8.5 PCI Express 3.0/2.0 x16 slot ......................................... 1-21

1.9 Jumpers ...................................................................................... 1-22

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

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

2.4.4 iGPU Max. Frequency [Auto] ........................................ 2-13

2.4.5 GPU Boost [OK] ............................................................ 2-13

2.4.6 DRAM Timing Control ................................................... 2-13

2.4.7 CPU Power Management ............................................. 2-13

2.5 Advanced menu ......................................................................... 2-15

2.5.1 CPU Conguration ........................................................ 2-15

2.5.2 PCH Conguration ........................................................ 2-16

2.5.3 SATA Conguration ....................................................... 2-17

2.5.4 System Agent Conguration ......................................... 2-18

2.5.5 AMT Conguration ........................................................ 2-18

2.6 Monitor menu ............................................................................. 2-22

2.6.5 CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage .. 2-24

2.6.6 Anti Surge Support [Enabled] ....................................... 2-24

2.7 Boot menu .................................................................................. 2-25

2.7.1 Bootup NumLock State [On] ......................................... 2-25

2.7.2 Full Screen Logo [Enabled] ........................................... 2-25

2.7.3 Wait for ‘F1’ If Error [Enabled] ....................................... 2-25

2.7.4 Option ROM Messages [Force BIOS] ........................... 2-26

2.7.5 Setup Mode [EZ Mode] ................................................. 2-26

2.7.6 UEFI/Legacy Boot [Enabled both UEFI and Legacy] .... 2-26

2.8.3 ASUS SPD Information ................................................. 2-27

2.9 Exit menu .................................................................................... 2-28

Notices .......................................................................................................A-1

ASUS contact information .......................................................................A-3

Safety information

1-8 Chapter 1: Product introduction

1.6 Central Processing Unit (CPU)

The motherboard comes with a surface mount LGA1155 socket designed for the Intel®

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.

ASUS P8B75-M LX 1-9

1-10 Chapter 1: Product introduction