Asus B85M-GAMER User manual

Motherboard
B85M-GAMER

ii
E10068
First Edition V1
January 2015
Copyright © 2015 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, modied or altered, unless
such repair, modication of alteration is authorized in writing by ASUS; or (2) the serial number of the
product is defaced or missing.
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OR CONDITIONS OF
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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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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
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or
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archives, etc. to this email address).

iii
Contents
Safety information ...................................................................................... iv
About this guide ......................................................................................... iv
Package contents ....................................................................................... vi
B85M-GAMER specications summary.................................................... vi
Chapter 1: Product introduction
1.1 Before you proceed ..................................................................... 1-1
1.2 Motherboard overview................................................................. 1-2
1.3 Central Processing Unit (CPU) ................................................... 1-4
1.4 System memory ........................................................................... 1-7
1.5 Expansion slots.......................................................................... 1-10
1.6 Jumpers ...................................................................................... 1-12
1.7 Connectors ................................................................................. 1-13
1.8 Software support........................................................................ 1-21
Chapter 2: BIOS information
2.1 Managing and updating your BIOS ............................................ 2-1
2.2 BIOS setup program .................................................................... 2-6
2.3 My Favorites ............................................................................... 2-10
2.4 Main menu .................................................................................. 2-11
2.5 Ai Tweaker menu........................................................................ 2-13
2.6 Advanced menu ......................................................................... 2-26
2.7 Monitor menu ............................................................................. 2-35
2.8 Boot menu .................................................................................. 2-39
2.9 Tool menu................................................................................... 2-45
2.10 Exit menu.................................................................................... 2-46
Appendices
Notices.......................................................................................................A-1
ASUS contact information .......................................................................A-3

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 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 qualied service
technician or your retailer.
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. 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 for 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
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 (+).

vi
B85M-GAMER specications summary
(continued on the next page)
Package contents
Check your motherboard package for the following items.
Motherboard ASUS Gaming Motherboard – B85M-GAMER
Cables 2 x Serial ATA 6.0 Gb/s cables
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.
CPU
LGA1150 socket for Intel®4th and new 4th Generation Core™ i7 / i5 / i3,
Pentium®, and Celeron®processors
Supports Intel®22nm CPU
Supports Intel®Turbo Boost Technology 2.0*
*The Intel®Turbo Boost Technology 2.0 support depends on the type of CPU installed
in your system.
** Refer to www.asus.com for Intel®CPU support list.
Chipset Intel®B85 Express Chipset
Memory
4 x DIMM, maximum 32 GB, DDR3 1600 / 1333 / 1066 MHz, non-ECC, un-buffered
memory*
Dual-channel memory architecture
Supports Intel® Extreme Memory Prole (XMP)
*Hyper DIMM support is subject to the physical characteristics of individual CPUs.
Please refer to Memory QVL (Qualied Vendors List) for details.
** Refer to www.asus.com for the latest Memory QVL (Qualied Vendors List).
*** Due to Intel®chipset limitation, DDR3 1600 MHz and higher memory modules on XMP
mode will run at the maximum transfer rate of DDR3 1600 MHz.
Graphics
Integrated graphics processor - Intel®HD Graphics support
- Supports HDMI with maximum resolution of 4096 x 2160 @24 Hz / 2560 x
1600 @60 Hz
- Supports D-Sub with maximum resolution of 1920 x 1200 @60 Hz
- Supports Intel®InTruTM 3D, Quick Sync Video, Intel®Clear Video HD
Technology, and Intel®Insider™
- Maximum shared memory of 1024 MB
Expansion
slots
1 x PCI Express 3.0/2.0 x16 slot (gray, at x16 mode)
2 x PCI Express 2.0 x1 slots

vii
B85M-GAMER specications summary
(continued on the next page)
Storage
Intel®B85 Express Chipset:
- 4 x Serial ATA 6.0 Gb/s connectors (gray)
- 2 x Serial ATA 3.0 Gb/s connectors (black)
- Supports Intel®Rapid Start Technology and Intel®Smart Connect
Technology*
*These functions work depending on the CPU installed.
LAN Intel®Gigabit LAN + LANGuard
Audio
SupremeFX 7.1-channel High Denition Audio CODEC*
- Supports jack-detection, multi-streaming and front panel MIC jack-retasking
- High quality 115dB SNR stereo playback output
Audio Features:
- SupremeFX ShieldingTM Technology
- ELNA premium audio capacitors
- Headphone AMP
*Use a chassis with HD audio module in the front panel to support an 7.1-channel
audio output.
USB
Intel®B85 Express Chipset - support ASUS USB 3.0 Boost
- 4 x USB 3.0/2.0 ports (2 ports at mid-board, 2 ports at rear panel)
Intel®B85 Express Chipset
- 6 x USB 2.0/1.1 ports (4 ports at mid-board, 2 ports at rear panel)
ASUS
Gaming
Features
Gamer's Guardian
- ESD Guards on LAN, Audio, KBMS and USB3.0/2.0 ports
- DRAM Overcurrent Protection
- Stainless Steel Back I/O
- ASUS DIGI+ VRM
Performance Optimization
- Dual Intelligent Processors 2 with DIGI+ VRM
- ASUS USB 3.0 Boost featuring speedy USB 3.0 transmission
- ASUS Fan Xpert
EZ DIY
- AI Suite 3
- Disk Unlocker
- AI Charger
Award-winning BIOS Design
- ASUS UEFI BIOS with EZ Mode featuring friendly graphics user interface
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2

viii
B85M-GAMER specications summary
Specications are subject to change without notice.
Rear Panel I/O
ports
1 x PS/2 keyboard port
1 x PS/2 mouse port
1 x HDMI port
1 x D-Sub port
1 x LAN (RJ45) port
2 x USB 3.0/2.0 ports
2 x USB 2.0/1.1 ports
8-channel audio I/O ports
Internal I/O
connectors
1 x 19-pin USB 3.0/2.0 connector supports additional 2 USB 3.0/2.0 ports
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports
1 x System panel
1 x Front panel audio connector (AAFP)
4 x SATA 6.0 Gb/s connectors (gray)
2 x SATA 3.0 Gb/s connectors (black)
1 x CPU Fan connector (4-pin)
1 x Chassis Fan connector (4-pin)
1 x COM connector
1 x 24-pin EATX Power connector
1 x 8-pin ATX 12V Power connector
1 x Clear CMOS jumper
BIOS features
64 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.7, ACPI
4.0a, Multi-language BIOS, ASUS EZ Flash 2, ASUS CrashFree BIOS 3, My
Favorites, Quick Note, Last Modied log, F12 PrintScreen Function, F3 Shortcut
function and ASUS DRAM SPD(Serial Presence Detect) memory information
Manageability Wfm 2.0, DMI 2.0, WOL by PME, PXE
Support DVD
Drivers
ASUS utilities
EZ Update
Anti-virus software (OEM version)
Form factor mATX form factor: 9.2 in. x 8.1 in. (23.3 cm x 20.6 cm)

ASUS B85M-GAMER 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.
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.
B85M-GAMER
B85M-GAMER Onboard LED
SB_PWR
ON
Standby Power Powered Off
OFF

1-2 Chapter 1: Product introduction
B85M-GAMER
Place this side
towards the rear
of the chassis
1.2 Motherboard overview
Beforeyouinstallthemotherboard,studythecongurationofyourchassistoensurethatthe
motherboardts.
Unplugthepowercordbeforeinstallingorremovingthemotherboard.Failuretodosocan
cause you physical injury and damage to motherboard components.
1.2.1 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.
1.2.2 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.

ASUS B85M-GAMER 1-3
1.2.3 Motherboard layout
B85M-GAMER
AUDIO
VGA
PCIEX16
PCIEX1_1
PCIEX1_2
Intel
I218V
USB1112USB910COM
AAFP
EATXPWR
BATTERY
ASM
1442
ALC
1150
SUPREMEFX
CLRTC
SB_PWR
20.6cm(8.1in)
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_1 SATA3G_2
SATA6G_3 SATA6G_4
SATA6G_1 SATA6G_2
LAN_USB34
KBMS
HDMI
USB3_56
CHA_FAN
CPU_FAN
23.3cm(9.2in)
LGA1150
DIGI
+VRM
EATX12V
USB3_12
Intel®
B85
LANGuard
64Mb
BIOS
PANEL
Super
I/O
1 2 3 41
8910111213
2
6
5
7
1.2.4 Layout contents
Connectors/Jumpers/Slots/LED Page
1. CPUandchassisfanconnectors(4-pinCPU_FAN,4-pinCHA_FAN) 1-15
2. EATXpowerconnectors(24-pinEATXPWR,8-pinEATX12V) 1-16
3. Intel®LGA1150CPUsocket 1-4
4. DDR3DIMMslots 1-7
5. Intel®B85SerialATA3.0Gb/sconnectors(7-pinSATA3G_1/2[black]) 1-19
6. Intel®B85SerialATA6.0Gb/sconnectors(7-pinSATA6G_1/2/3/4[gray]) 1-19
7. StandbyPowerLED(SB_PWR) 1-1
8. Systempanelconnector(20-8pinPANEL) 1-20
9. ClearRTCRAM(3-pinCLRTC) 1-12
10. USB3.0connectors(20-1pinUSB3_12) 1-17
11. USB2.0connectors(10-1pinUSB910,USB1112) 1-18
12. Serialportconnectors(10-1pinCOM) 1-15
13. Frontpanelaudioconnector(10-1pinAAFP) 1-17

1-4 Chapter 1: Product introduction
1.3 Central Processing Unit (CPU)
ThismotherboardcomeswithasurfacemountLGA1150socketdesignedfortheIntel®4th
andNew4thGenerationCore™i7/Core™i5/Core™i3,Pentium® ,Celeron®processors.
B85M-GAMER
B85M-GAMER CPU socket LGA1150
UnplugallpowercablesbeforeinstallingtheCPU.
• EnsurethatyouinstallthecorrectCPUdesignedfortheLGA1150socketonly.DO
NOTinstallaCPUdesignedforLGA1155andLGA1156socketsontheLGA1150
socket.
• 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.
• 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
LGA1150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 B85M-GAMER 1-5
1.3.1 Installing the CPU
1
23
A
B
A
B
C
5
4

1-6 Chapter 1: Product introduction
1.3.2 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.
3 4
To install the CPU heatsink and fan assembly
2
B
A
A
B
1

ASUS B85M-GAMER 1-7
A
B
B
A
To uninstall the CPU heatsink and fan assembly
2
1
1.4 System memory
1.4.1 Overview
ThismotherboardcomeswithfourDoubleDataRate3(DDR3)DualInlineMemoryModule
(DIMM)sockets.ADDR3moduleisnotcheddifferentlyfromaDDRorDDR2module.DO
NOTinstallaDDRorDDR2memorymoduletotheDDR3slot.
B85M-GAMER 240-pin DDR3 DIMM sockets
B85M-GAMER
DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
AccordingtoIntel®CPUspec,DIMMvoltagebelow1.65Visrecommendedtoprotectthe
CPU.

1-8 Chapter 1: Product introduction
1.4.2 Memorycongurations
Youmayinstall1GB,2GB,4GB,and8GBunbufferednon-ECCDDR3DIMMsintothe
DIMMsockets.Youcanrefertotherecommendedmemorypopulationbelow.
Combination
Recommended DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
1SS
2SS
3SS SS
4 DS
5DS
6DS DS
7DS DS DS DS
SS:Single-sidedmemory DS:Double-sidedmemory
• 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.
• DuetoIntel®chipsetlimitation,DDR31600MHzandhighermemorymodulesonXMP
modewillrunatthemaximumtransferrateofDDR31600MHz.
• 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3GB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.
 - 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Mb(64MB)chipsorless.

ASUS B85M-GAMER 1-9
• 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.
• Forsystemstability,useamoreefcientmemorycoolingsystemtosupportafull
memoryload(4DIMMs).
• VisittheASUSwebsiteatwww.asus.comforthelatestQVL.
1.4.3 Installing a DIMM
1
2
3
To remove a DIMM
BA

1-10 Chapter 1: Product introduction
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 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.

ASUS B85M-GAMER 1-11
1.5.4 PCI Express 2.0 x1 slots
ThismotherboardsupportsPCIExpressx1networkcards,SCSIcards,andothercardsthat
complywiththePCIExpressspecications.
1.5.5 PCI Express 3.0/2.0 x16 slot
ThismotherboardsupportsPCIExpressx16graphiccardcomplyingwiththePCIExpress
specications.
IRQ assignments for this motherboard
A B C D E F G H
I.G.D. Shared –––––––
PCIex16 Shared –––––––
PCIex1_1 Shared –––––––
PCIex1_2 –Shared ––––––
IntelSATAController –––Shared ––––
IntelLAN ––––Shared –––
IntelxHCI –––––Shared – –
IntelEHCI1 –––––––Shared
IntelEHCI2 Shared –––––––
HDAudio ––––––Shared –

1-12 Chapter 1: Product introduction
1.6 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.
B85M-GAMER
B85M-GAMER Clear RTC RAM
122 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!
• 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.