Asus B85M-K PLUS User manual

Motherboard
B85M-K PLUS
E10185_B85M-K_PLUS_Guide.indb 1 2015/2/13 14:25:07

ii
E10185
First Edition
February 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.
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 identication or explanation and to the
owners’ benet, 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
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the product and describing the problem (please DO NOT send large attachments such as source code
archives, etc. to this email address).
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iii
Contents
Safety information...................................................................................................... iv
About this guide......................................................................................................... iv
Package contents....................................................................................................... vi
B85M-K PLUS specifications 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).................................................................... 1-4
1.4 System memory............................................................................................ 1-7
1.5 Expansion slots............................................................................................ 1-9
1.6 Jumpers.......................................................................................................1-11
1.7 Connectors..................................................................................................1-13
1.8 Onboard LEDs ............................................................................................1-21
1.9 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 My Favorites..................................................................................................2-9
2.4 Main menu................................................................................................... 2-10
2.5 Ai Tweaker menu ........................................................................................2-11
2.6 Advanced menu.......................................................................................... 2-12
2.7 Monitor menu.............................................................................................. 2-12
2.8 Boot menu................................................................................................... 2-13
2.9 Tool menu ...................................................................................................2-14
2.10 Exit menu ....................................................................................................2-14
Appendices
Notices ..................................................................................................................... A-1
ASUS contact information...................................................................................... A-4
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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.
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.
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v
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 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 (+).
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vi
(continued on the next page)
B85M-K PLUS specifications summary
CPU LGA1150 socket for Intel®4th & New 4th Generation CoreTM i7/ i5/ i3,
Pentium®and Celeron®Processors
Supports 22nm CPU
Supports Intel®Turbo Boost Technology 2.0*
*Intel®Turbo Boost Technology 2.0 support depends on the CPU types.
** Refer to www.asus.com for Intel®CPU support list.
Chipset Intel®B85 Express Chipset
Memory 2 x DIMMs, max. 16GB DDR3 1600/1333/1066MHz, non-ECC, unbuffered
memory modules
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 for details.
** Refer to www.asus.com for the latest Memory QVL (Qualified Vendors List).
*** Due to Intel®chipset limitations, DDR3 1600MHz and higher memory modules
on XMP mode will run at the maximum transfer rate of DDR3 1600MHz.
Graphics Integrated Graphics Processor - Intel® HD Graphics support
Multi-VGA output support: DVI-D, RGB port
- Supports DVI-D with max. resolution up to 1920 x1200@60Hz
- Supports RGB with max. resolution 1920x1200@60Hz
- Maximum shared memory of 1024MB
Expansion slots 1 x PCI Express 3.0/2.0 x16 slot (at x16 mode)
2 x PCI Express 2.0 x1 slots
LAN Realtek®8111GR Gigabit LAN Controller
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 will work depending on the CPU installed.
Package contents
Check your motherboard package for the following items.
Motherboard ASUS B85M-K PLUS motherboard
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.
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vii
B85M-K PLUS specifications summary
Audio Realtek® ALC887 7.1-Channel High Denition Audio CODEC
- Supports Jack-Detection and Front Panel Jack-Retasking
Audio Features:
- LED-lit audio shielding - Ensures precision analog/digital separation and
greatly reduced multi-lateral interference, with a gorgeous illuminated trace
path
- Dedicated audio PCB layers: Separate layers for left and right channels to
guard the quality of the sensitive audio signals
- Premium Japanese-made audio capacitors: Provide warm, natural and
immersive sound with exceptional clarity and delity.
* Use a chassis with HD audio module in the front panel to support an 8-channel
audio output
USB Intel®B85 Express Chipset - supports ASUS USB 3.0 Boost
- 4 x USB 3.0/2.0 ports (2 ports at mid-board, 2 ports at the rear panel)
Intel®B85 Express Chipset
- 6 x USB 2.0/1.1 ports (4 ports at mid-board, 2 ports at the rear panel)
ASUS unique
features High Performance
UEFI BIOS
- Most advanced options with fast response time
ASUS EPU
- EPU
ASUS Exclusive Features
- GPU Boost
- USB 3.0 Boost
- AI Suite 3
- ASUS AI Charger
- ASUS ESD
- ASUS Anti-surge Production
UEFI BIOS EZ Mode
- Featuring friendly graphics user interface
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 2
Q-Design
- ASUS Q-Slot
ASUS Quiet
Thermal
Solution
Quiet Thermal Design
- ASUS Fan Xpert
- ASUS Fanless Design: PCH Heat-sink
Back Panel I/O
ports
1 x PS/2 keyboard port (purple)
1 x PS/2 mouse port (green)
2 x USB 3.0/2.0 ports
2 x USB 2.0/1.1 ports
1 x DVI port
1 x D-Sub port
1 x LAN (RJ-45) port
3 x Audio jacks support 7.1-channel audio output
(continued on the next page)
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viii
B85M-K PLUS specifications summary
Specications are subject to change without notice.
Internal I/O
connectors/
buttons/switches
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports
1 x USB 3.0/2.0 connectors support additional 2 USB 3.0/2.0 ports
4 x SATA 6.0Gb/s connectors
2 x SATA 3.0Gb/s connectors
1 x CPU fan connector
1 x Chassis fan connector
1 x COM header
1 x Front panel audio connector
1 x S/PDIF Out connector
1 x 24-pin EATX power connector
1 x 4-pin EATX 12V power connector
1 x Speaker connector
1 x TPM connector
1 x System panel connector
1 x CLRTC jumper
BIOS features 64 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI2.0, WfM 2.0, SM BIOS 2.7,
ACPI 2.0a, Multi-language BIOS, ASUS EZ Flash 2, ASUS CrashFree
BIOS 3, My Favorites, Quick Note, Last Modied Log, F12 PrintScreen, F3
Shortcut functions 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)
Operating System
Support
Windows®8.1
Windows®8
Windows®7
Form factor uATX form factor: 8.9 in x 6.9 in (22.6 cm x 17.5 cm)
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ASUS B85M-K 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.
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1-2
Chapter 1: Product introduction
B85M-K PLUS
Place this side towards
the rear of the chassis
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.
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ASUS B85M-K PLUS
1-3
1.2.3 Motherboard layout
B85M-K PLUS
PCIEX16
PCIEX1_1
PCIEX1_2
SPEAKER
F_PANEL
CLRTC
SPDIF_OUT
PS2_USBPW1-4
USBPW5-10
USB56
COM
USB78 USB3_910
AAFP
ATX12V
EATXPWR
CPU_FAN
CHA_FAN
BATTERY
Super
I/O
ALC
887-VD2
RTL
8111GR
ASP
1255
22.6cm(8.9in)
LGA1150
Intel®
B85
DDR3 DIMM_A1 (64bit, 240-pin module) DDR3 DIMM_B1 (64bit, 240-pin module)
SATA6G_1 SATA6G_2SATA3G_1
SATA6G_4
SATA6G_3
SATA3G_2
AUDIO
KBMS
LAN_USB34
USB3_12
17.5cm(6.9in)
DVIVGA
64Mb
BIOS
TPM
SB_PWR
2 41 533
2
61011121314
15
7
6
8
9
16
17
18
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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® andCeleron®
processors.
1.2.4 Layout contents
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.
• 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.
Connectors/Jumpers/Slots/LED Page
1. KeyboardandUSBdevicewake-up(3-pinPS2_USBPW1~4) 1-12
2. ATXpowerconnectors(24-pinEATXPWR,4-pinATX12V) 1-17
3. CPUandchassisfanconnectors(4-pinCPU_FAN,4-pinCHA_FAN) 1-16
4. Intel®LGA1150CPUsocket 1-4
5. DDR3DIMMslots 1-7
6. Intel®B85SerialATA6.0Gb/sconnector(7-pinSATA6G_1~4[gray]) 1-18
7. Speakerconnector(4-pinSPEAKER) 1-17
8. Systempanelconnector(10-1pinF_PANEL) 1-19
9. Intel®B85SerialATA3.0Gb/sconnector(7-pinSATA3G_1~2[black]) 1-18
10. USB3.0connector(20-1pinUSB3_910) 1-19
11. USB2.0connectors(10-1pinUSB78,USB56) 1-16
12. USBdevicewake-up(3-pinUSBPW5~10) 1-12
13. TPMheader(20-1pinTPM) 1-20
14. Frontpanelaudioconnector(10-1pinAAFP) 1-15
15. Digitalaudioconnector(4-1pinSPDIF_OUT) 1-15
16. OnboardLED(SB_PWR) 1-21
17. ClearRTCRAM(3-pinCLRTC) 1-11
18. Serialportconnectors(10-1pinCOM) 1-20
B85M-K PLUS
B85M-K PLUS CPU socket LGA1150
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ASUS B85M-K PLUS
1-5
1.3.1 Installing the CPU
1
23
A
B
A
B
C
45
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1-6
Chapter 1: Product introduction
1.3.2 CPU heatsink and fan assembly installation
To install the CPU heatsink and fan assembly
2
B
A
A
B
1
ApplytheThermalInterfaceMaterial
totheCPUheatsinkandCPU
before you install the heatsink and
fan if necessary.
3 4
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ASUS B85M-K 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isnotcheddifferentlyfromaDDRorDDR2module.DO
NOTinstallaDDRorDDR2memorymoduletotheDDR3slot.
Channel Sockets
ChannelA DIMM_A1
ChannelB DIMM_B1
1.4.2 Memory configurations
Youmayinstall1GB,2GB,4GB,and8GBunbufferednon-ECCDDR3DIMMsintotheDIMM
sockets.
A
B
B
A
To uninstall the CPU heatsink and fan assembly
2
1
AccordingtoIntel®CPUspec,DIMMvoltagebelow1.65Visrecommendedtoprotectthe
CPU.
B85M-K PLUS
B85M-K PLUS 240-pin DDR3 DIMM sockets
DIMM_A1 DIMM_B1
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1-8
Chapter 1: Product introduction
• 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limitations,DDR31600MHzandhighermemorymoduleson
XMPmodewillrunatthemaximumtransferrateofDDR31600MHz.
• 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.
- 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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.
• Forsystemstability,useamoreefcientmemorycoolingsystemtosupportafull
memoryload(2DIMMs)oroverclockingcondition.
• Refertowww.asus.comforthelatestMemoryQVL(QualiedVendorsList)
1.4.3 Installing a DIMM
1
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1-9
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.
2
3
To remove a DIMM
B
A
A
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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 Configuring 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 Express x1 slots
ThismotherboardsupportstwoPCIExpressx1networkcards,SCSIcards,andothercards
thatcomplywiththePCIExpressspecications.
1.5.4 PCI Express x16 slot
ThismotherboardsupportsonePCIExpressx16graphicscardthatcomplieswiththePCI
Expressspecications.
IRQ assignments for this motherboard
A B C D E F G H
LAN - - shared - - - - -
PCIEx16 shared - - - - - -
PCIEx1_1 shared - - - - - - -
PCIEx1_2 - shared - - - - - -
IntelPCHSATAController - - - shared - - - -
HDAudio - - - - - - shared
USB2.0_1 - - - - - - - shared
USB2.0_2 - - - - shared - - -
USB3.0 - - - - - shared -
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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.
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.
B85M-K PLUS
B85M-K PLUS Clear RTC RAM
1 2 2 3
Normal
(Default)
Clear RTC
CLRTC
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Chapter 1: Product introduction
3. USB device wake-up (3-pin USBPW5~10)
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).
• TheUSBdevicewake-upfeaturerequiresapowersupplythatcanprovide500mAon
the+5VSBleadforeachUSBport;otherwisethesystemwouldnotpowerup.
• ThetotalcurrentconsumedmustNOTexceedthepowersupplycapability(+5VSB)
whether under normal conditions or in sleep mode.
2. Keyboard and USB device wake-up (3-pin PS2_KBPW1~4)
ThisjumperallowsyoutoenableordisablethekeyboardandUSB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keyboardorusingtheconnectedUSBdevices.Thisfeature
requiresanATXpowersupplythatcansupplyatleast1Aonthe+5VSBlead,anda
correspondingsettingintheBIOS.
B85M-K PLUS
1 2
2 3
+5V +5VSB
(Default)
B85M-K PLUS Keyboard and USB device wake-up
PS2_USBPW1-4
B85M-K PLUS
21 2 3
+5V
(Default)
+5VSB
USBP5-10
B85M-K PLUS USB device wake-up
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