Asus Z97-K Computer Hardware User Manual


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1-8
Chapter 1: Product introduction
1.4 System memory
1.4.1 Overview
ThismotherboardcomeswithfourDoubleDataRate3(DDR3)DualInlineMemoryModule
(DIMM)sockets.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
1.4.2 Memory configurations
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CPUspec,DIMMvoltagebelow1.65V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.
- 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.
• 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2.5 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.
• VisittheASUSwebsiteat:www.asus.comforthelatestQVL.
Z97-K
Z97-K
240-pin DDR3 DIMM sockets
DIMM_A1
DIMM_A2
DIMM_B1
DIMM_B2
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