Asus B75M-PLUS User manual

Motherboard
B75M-PLUS

ii
E8250
First Edition
April 2013
Copyright © 2013 ASUSTeK COMPUTER INC. All Rights Reserved.
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Product warranty or service will not be extended if: (1) the product is repaired, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
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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
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archives, etc. to this email address).

iii
Contents
Safety information...................................................................................................... iv
About this guide......................................................................................................... iv
Package contents....................................................................................................... vi
B75M-PLUS specications summary....................................................................... vi
Chapter 1: Product introduction
1.1 Before you proceed...................................................................................... 1-1
1.2 Motherboard overview ................................................................................. 1-1
1.3 Central Processing Unit (CPU).................................................................... 1-3
1.4 System memory............................................................................................ 1-7
1.5 Expansion slots .......................................................................................... 1-10
1.6 Jumpers....................................................................................................... 1-11
1.7 Connectors.................................................................................................. 1-13
1.9 Onboard LEDs ............................................................................................ 1-21
1.10 Software support ........................................................................................ 1-22
Chapter 2: BIOS information
2.1 Managing and updating your BIOS............................................................. 2-1
2.2 BIOS setup program..................................................................................... 2-6
2.3 Main menu..................................................................................................... 2-9
2.4 Ai Tweaker menu ........................................................................................ 2-11
2.5 Advanced menu.......................................................................................... 2-17
2.6 Monitor menu.............................................................................................. 2-24
2.7 Boot menu................................................................................................... 2-27
2.8 Tools menu.................................................................................................. 2-33
2.9 Exit menu ....................................................................................................2-34
Appendices
Notices ..................................................................................................................... A-1

iv
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 x it by yourself. Contact a qualied 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 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 qualied service
technician or your retailer.
•
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•
About this guide
This user guide contains the information you need when installing and conguring 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.

v
Where to nd 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 yers,
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 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.
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 (+).

vi
(continued on the next page)
B75M-PLUS specications summary
Package contents
Check your motherboard package for the following items.
Motherboard ASUS B75M-PLUS motherboard
Cables 1 x Serial ATA 6.0 Gb/s cable
1 x Serial ATA 3.0 Gb/s cable
Accessories 1 x I/O Shield
Application DVD Support DVD
Documentation User Guide
• If any of the above items is damaged or missing, contact your retailer.
• The illustrated items above are for reference only. Actual product specications may
vary with different models.
CPU LGA1155 socket for Intel®3rd / 2nd Generation Core i7 / i5 / i3, Pentium®
and 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.
** Refer to www.asus.com for Intel®CPU support list.
Chipset Intel®B75 Express Chipset
Memory 4 x DIMM, max. 32GB, DDR3 2200 (O.C.) / 2133 (O.C.) / 2000 (O.C.) /
1866 (O.C.) / 1600 / 1333/ 1066 MHz, non-ECC,un-buffered memory
Dual-channel memory architecture
Supports Intel® Extreme Memory Prole (XMP)
* The maximum 32GB memory capacity can be supported with 8GB (or higher).
ASUS will update the QVL once the DIMMs are available in the market.
** Due to the CPU behavior, DDR3 2133/1866MHz memory module will run at DDR3
2000/1800MHz frequency.
*** Intel®3rd Generation Core processors support DDR3 1600Mhz and higher
memory frequency.
**** Refer to www.asus.com for the latest Memory QVL (Qualied Vendors List).
Graphics Integrated graphics processor
Multi-VGA output support: HDMI, DVI-D, and D-Sub ports
- Supports HDMI with max.resolution of 1920 x 1200 @60Hz
- 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 1 x PCI Express 3.0*/2.0 x16 slot
1 x PCI Express 2.0 x1 slot
1 x PCI slot
* Intel®3rd Generation Core processors support PCIe 3.0.

vii
B75M-PLUS specications summary
Storage Intel®B75 Express Chipset:
- 5 x Serial ATA 3.0 Gb/s connectors
- 1 x Serial ATA 6.0 Gb/s connector
LAN Realtek®8111G Gigabit LAN controller
Audio Realtek® ALC887-VD High Denition 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 4 x USB 3.0 ports (2 ports at midboard, 2 ports at back panel)
8 x USB 2.0 ports (4 ports at midboard, 4 ports at back panel)
ASUS unique
features
ASUS DIGI+VRM
- ASUS DIGI+VRM: Digital Power Design for the CPU and iGPU
- ASUS 3+1 Phase Power Design
ASUS Eclusive Features
- ASUS EPU
- ASUS USB 3.0 Boost
- Network iControl
- AI Suite II
- AI Charger
- Anti-Surge
- ASUS UEFI BIOS EZ Mode
- GPU Boost
- 100% Solid capacitors
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 port (purple)
1 x PS/2 mouse port (green)
1 x HDMI port
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 ports
3 x Audio jacks
(continued on the next page)

viii
B75M-PLUS specications summary
Specications are subject to change without notice.
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
1 x SATA 6.0 Gb/s connector
5 x SATA 3.0 Gb/s connectors
1 x COM port connector
1 x LPT connector
1 x S/PDIF Out header
1 x 4-pin CPU fan connector
1 x 4-pin Chassis fan connectors
1 x Front panel audio connector (AAFP)
1 x System panel connector
1 x 24-pin ATX power connector
1 x 4-pin ATX 12V power connector
1 x Speaker connector
BIOS features 64 Mb Flash ROM, AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.7, ACPI
2.0a, Multi-language BIOS, ASUS EZ Flash 2, ASUS CrashFree BIOS 3
Manageability WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE
Support DVD Drivers
ASUS utilities
ASUS Update
Anti-virus software (OEM version)
Form factor MicroATX form factor: 8.9”x 7.8” (22.6cm x 19.8cm)

ASUS B75M-PLUS 1-1
Product introduction
1
1.1 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.
1.2 Motherboard overview
Before you install the motherboard, study the conguration of your chassis to ensure that the
motherboard ts 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.
1.2.1 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.
1.2.2 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.

1-2 Chapter 1: Product introduction
B75M-PLUS
Place this side towards
the rear of the chassis
1.2.3 Motherboard layout
B75M-PLUS
PCIEX16
PCIEX1_1
PCI1
F_PANEL
SPEAKER
CLRTC
SPDIF_OUT
LPT
USBPWF
KB_USBPWB
USB56 USB78
AAFP
ATX12V
EATXPWR
CPU_FAN
CHA_FAN
BATTERY
Super
I/O
ALC
887
RTL
8111G
DIGI
+VRM
8MB
BIOS
SB_PWR
22.6cm(8.9in)
LGA1155
Intel®
B75
DDR3 DIMM_A1 (64bit, 240-pin module) DDR3 DIMM_A2 (64bit, 240-pin module) DDR3 DIMM_B1 (64bit, 240-pin module) DDR3 DIMM_B2 (64bit, 240-pin module)
SATA3G_4 SATA3G_5
SATA6G_1 SATA3G_1 SATA3G_2
SATA3G_3
AUDIO
KBMS
LAN1_USB12
USB3_12
USB34
HDMI
19.8cm(7.8in)
DVI_VGA
COM
USB3_34
432 31 5
1
10 9612 1113141516
17
6
7
8
18

ASUS B75M-PLUS 1-3
1.3 Central 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.
1.2.4 Layout contents
Unplug all power cables before installing the CPU.
B75M-PLUS
B75M-PLUS CPU socket LGA1155
Connectors/Jumpers/Slots/LED Page
1. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V) 1-15
2. Keyboard and USB device wake-up (KB_USBPWB) 1-12
3. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN) 1-16
4. Intel®LGA1155 CPU socket 1-3
5. DDR3 DIMM slots 1-7
6. Intel®B75 Serial ATA 3.0Gb/s connectors (7-pin SATA3G_1~5 [blue]) 1-18
7. Intel®B75 Serial ATA 6.0Gb/s connector (7-pin SATA6G_1 [gray]) 1-18
8. Speaker connector (4-pin SPEAKER) 1-17
9. USB 3.0 connector (20-1 pin USB3_34) 1-19
10. System panel connector (10-1 pin F_PANEL) 1-17
11. USB device wake-up (USBPWF) 1-12
12. USB 2.0 connectors (10-1 pin USB56, USB78) 1-19
13. Serial port connectors (10-1 pin COM) 1-20
14. Clear RTC RAM (3-pin CLRTC) 1-11
15. LPT connector (26-1 pin LPT) 1-21
16. Front panel audio connector (10-1 pin AAFP) 1-15
17. Digital audio connector (4-1 pin SPDIF_OUT) 1-20
18. Onboard LED (SB_PWR) 1-21

1-4 Chapter 1: Product introduction
1.3.1 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.
The LGA1156 CPU is incompatible with the LGA1155 socket. DO NOT install a LGA1156
CPU on the LGA1155 socket.
1
23
A
B

ASUS B75M-PLUS 1-5
1.3.2 CPU heatsink and fan assembly installation
A
B
C
5
4
Apply the Thermal Interface Material to the
CPU heatsink and CPU before you install the
heatsink and fan if necessary.

1-6 Chapter 1: Product introduction
To install the CPU heatsink and fan assembly
To uninstall the CPU heatsink and fan assembly
2
B
A
A
B
3
1
4
2
1
B
B
A
A

ASUS B75M-PLUS 1-7
1.4 System memory
1.4.1 Overview
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 gure illustrates the
location of the DDR3 DIMM sockets:
Channel Sockets
Channel A DIMM_A1 and DIMM_A2
Channel B DIMM_B1 and DIMM_B2
DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
B75M-PLUS
B75M-PLUS 240-pin DDR3 DIMM sockets
1.4.2 Memory congurations
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 conguration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• According to Intel CP specication, DIMM voltage below 1.65V is is recommended to
protect the CPU.
• 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.

1-8 Chapter 1: Product introduction
1.4.3 Installing a DIMM
• For more details, refer to the Microsoft®support site at http://support.microsoft.com/
kb/929605/en-us
• This motherboard does not support DIMMs made up of 512 megabits (Mb) chips or
less.
• Memory modules with memory frequency higher than 2133 MHz and its corresponding
timing or the loaded X.M.P. Prole is not the JEDEC memory standard. The stability
and compatibility of these memory modules depend on the CPU’s capabilities and
other installed devices.
• The maximum 32GB memory capacity can be supported with 8GB or above DIMMs.
ASUS will update the memory QVL once the DIMMs are available in the market.
• 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 efcient memory cooling system to support a full
memory load (4 DIMMs) or overclocking condition.
1

ASUS B75M-PLUS 1-9
2
To remove a DIMM
B
A
3

1-10 Chapter 1: Product introduction
1.5 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.
1.5.1 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. Remove the system unit cover (if your motherboard is already installed in a chassis).
3. 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 rmly until the card is completely
seated on the slot.
5. Secure the card to the chassis with the screw you removed earlier.
6. Replace the system cover.
1.5.2 Conguring an expansion card
After installing the expansion card, congure 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. Assign an IRQ to the card.
3. 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, conicts will arise between the two PCI
groups, making the system unstable and the card inoperable.
1.5.3 PCI slot
The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that
comply with PCI specications.
1.5.4 PCI Express 2.0 x1 slot
This motherboard supports PCI Express 2.0 network cards, SCSI cards, and other cards that
comply with the PCI Express specications.

ASUS B75M-PLUS 1-11
1.5.5 PCI Express 3.0/2.0 x1 slot
This motherboard supports one PCI Express 3.0/2.0 graphics card that comply with the PCI
Express specications.
Intel®3rd Generation Core processors support PCIe 3.0.
IRQ assignments for this motherboard
A B C D E F G H
Intel PCH SATA controller #0 - - - shared - - - -
Intel PCH SATA controller #1 - - - shared - - - -
Realtek 8111G controller shared - - - - - - -
1.6 Jumpers
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.
B75M-PLUS
B75M-PLUS Clear RTC RAM
1 2 2 3
Normal
(Default)
Clear RTC
CLRTC
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!

1-12 Chapter 1: Product introduction
• 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.
2. Keyboard and USB device wake-up (KB_USBPWB)
This jumper allows you to enable or disable the P/S 2 device wake-up feature. When
you set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a
key on the P/S 2 keyboard or by clicking on the P/S 2 mouse. This feature requires an
ATX power supply that can supply at least 1A on the +5VSB lead, and a corresponding
setting in the BIOS.
3. USB device wake-up (USBPWF)
Set this jumper to +5V to wake up the computer from S1 sleep mode (CPU stopped,
DRAM refreshed, system running in low power mode) using the connected USB
devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU,
DRAM in slow refresh, power supply in reduced power mode).
B75M-PLUS
+5V +5VSB
(Default)
KB_USBPWB
B75M-PLUS Keyboard and USB device wake up
1 2 2 3
B75M-PLUS
21 2 3
+5V
(Default)
+5VSB
USBPWF
B75M-PLUS USB device wake up