Contents
Chapter 1:
iii
Contents
Chapter 2:
iv
Contents
v
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.
2.
ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
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
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 (+).
vii
B75M-A specifications summary
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.
Chipset
Memory
Intel® B75 Express Chipset
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
* 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.
*** Intel® 3rd generation processors support DDR3 1600 MHz and higher frequency.
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
1 x PCI Express 3.0/2.0 x16 slot
2 x PCI Express 2.0 x1 slots
1 x PCI slot
Expansion slots
Storage
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
LAN
Audio
6+2 Channels Realtek® ALC887-VD 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
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)
(continued on the next page)
viii
B75M-A specifications summary
ASUS unique features
ASUS Exclusive Features:
- ASUS USB 3.0 Boost
- ASUS Network iControl
- ASUS AI Suite II
- ASUS 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 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
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
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
B75M-A 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
Support DVD
WfM 2.0, DMI 2.0, WOL by PME, WOR by PME, PXE
Drivers
ASUS utilities
ASUS Update
Anti-virus software (OEM version)
Form factor
MicroATX form factor: 9.6”x 7.0” (24.4cm x 17.8cm)
Specifications are subject to change without notice.
x
Package contents
Check your motherboard package for the following items.
DVI_VGA
L G A 1 1 5 5
DDR3 DIMM_A1 (64bit, 240-pin module)
DDR3 DIMM_B1 (64bit, 240-pin module)
SATA3G_5 SATA3G_3 SATA3G_1
EATXPWR
SATA6G_1
SATA3G_4 SATA3G_2
1 x Serial ATA 3.0Gb/s cable
1 x Serial ATA 6.0Gb/s cable
ASUS B75M-A motherboard
User Manual
1 x I/O-Shield
User Guide
Support DVD
•
If any of the above items are damaged or missing, contact your retailer.
•
The illustrated items above are for reference only. Actual product specifications may
vary with different models.
xi
xii
Product introduction
1
1.1
Special features
Product highlights
1.1.1
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 It provides great graphics performance with its iGPU,
dual-channel DDR3 memory slots, and PCI Express 2.0/3.0 slots.
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 2200 (O.C.)*/ 2000 (O.C.) / 1800 (O.C.) / 1600 / 1333 / 1066
MHz support
The motherboard supports DDR3 memory that features data transfer rates of 2200 (O.C.)/
2000 (O.C.) / 1800 (O.C.) / 1600 / 1333 / 1066 MHz to boost the system’s performance, and
to meet the higher bandwidth requirements of the latest 3D graphics, multimedia, and Internet
applications.
*
Intel® 3rd generation processors support DDR3 1600 MHz and higher frequency.
1.1.2
ASUS Exclusive features
Native SATA 6.0 Gb/s support
With Intel® B75 Express Chipset native support for the next-generation Serial ATA (SATA)
storage interface, this motherboard delivers up to 6.0 Gb/s data transfer rates. It also
provides enhanced scalability, faster data retrieval, and double the bandwidth of current bus
systems.
1-1
ASUS B75M-A
Complete USB 3.0 Integration
This motherboard offers you the strategic USB 3.0 accessibility for both the front and rear
panels, allowing you to experience the convenience of the latest plug and play connectivity
solution at speed up to ten times faster than USB 2.0.
PCI Express® 3.0
PCI Express® 3.0 (PCIe 3.0) is the PCI Express bus standard that provides twice the
performance and speed of PCIe 2.0. It provides an optimal graphics performance,
unprecedented data speed, and seamless transition with its complete backward compatibility
to PCIe 1.0/2.0 devices.
* Intel® 3rd generation Core™ processors support PCIe 3.0
ASUS UEFI BIOS (EZ Mode)
ASUS UEFI BIOS, a UEFI compliant architecture, offers the first mouse-controlled intuitive
graphical BIOS interface that goes beyond the traditional keyboard-only BIOS controls,
providing you with more flexibility, convenience, and easy to navigate EFI BIOS than the
traditional BIOS versions. It offers you with dual selectable modes and native support for hard
drives larger than 2.2 TB.
ASUS UEFI BIOS includes the following new features:
•
•
•
F12 BIOS snapshot hotkey
F3 Shortcut for most accessed information
ASUS DRAM SPD (Serial Presence Detect) information detecting faulty DIMMs, and
helping with difficult POST situations.
Ai Charger
Ai Charger is a unique fast-charging software that supports iPods, iPhones, and iPads.
* 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.
*** Ai Charger is only supported when you set the USB device wake-up jumpers to +5VSB. See section 1.7 Jumpers
for details.
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.
AI Suite II
With its user interface, ASUS AI Suite II integrates several ASUS utilities and allows you to
launch and operate these utilities simultaneously. It allows you to configure the overclocking
settings, adjust the frequencies and related voltages, remotely control the system via a
mobile device, and other easy-to-use helpful utilities.
1-2
Chapter 1: Product introduction
ASUS MyLogo 2™
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 Fan Xpert
ASUS Fan Xpert intelligently allows you to adjust both the CPU and chassis fan speeds
based on different ambient temperatures, resulting to a quiet and cool computing
environment.
Network iControl
Network iControl is an intuitive one-step network control center that makes it easier for you to
manage your bandwidth and allows you to set, monitor, and schedule the bandwidth priorities
for your network programs. It allows you to automatically connect to a PPPoE network for a
more convenient online experience.
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.
1-3
ASUS B75M-A
1.2
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.
1.3
Motherboard 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.
1.3.1
Placement 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.
1-4
Chapter 1: Product introduction
1.3.2
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.
B75M-A
Place this side
towards the rear
of the chassis
1-5
ASUS B75M-A
1.3.3
Motherboard layout
1
2
3
4
5
4
6
17.8cm(7.0in)
PS2_USBPW34
KBMS
CPU_FAN
DIGI
+VRM
USB34
ATX12V
HDMI
USBPW12
2
USB3_12
LAN1_USB12
AUDIO
BATTERY
B75M-A
PCIEX16
CHA_FAN
RTL
8111F
7
PCIEX1_1
PCIEX1_2
Intel®
B75
Super
I/O
128Mb
BIOS
8
9
ALC
887
PCI1
USB56
SB_PWR
USB78
USB3_34
SPEAKER
CLRTC
USBPW5-8
15
AAFP
F_PANEL
13
1
12
11 10
14
1-6
Chapter 1: Product introduction
1.3.4
Layout contents
Connectors/Jumpers/Slots/LED
Page
1. USB device wake-up (USBPW12)
1-22
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
3. P/S 2 device wakeup (PS_USBPW34)
1-26
1-21
1-27
1-8
4. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN)
5. Intel® LGA1155 CPU socket
6. DDR3 DIMM slots
1-13
1-29
1-30
1-30
1-28
1-29
1-31
1-32
1-20
1-25
7. Intel® B75 Serial ATA 3.0Gb/s connectors (7-pin SATA3G_1~5 [blue])
8. Intel® B75 Serial ATA 6.0Gb/s connector (7-pin SATA6G_1 [gray])
9. USB 3.0 connector (20-1 pin USB3_34)
10. System panel connector (10-1 pin F_PANEL)
11. Speaker connector (4-pin SPEAKER)
12. USB 2.0 connectors (10-1 pin USB56, USB78)
13. Onboard LED (SB_PWR)
14. Clear RTC RAM (3-pin CLRTC)
15. Front panel audio connector (10-1 pin AAFP)
1-7
ASUS B75M-A
1.4
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.
B75M-A
B75M-A 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
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