User's Manual

ASUS H81T R2.0
1-7
1.4 System memory
1.4.1 Overview
ThismotherboardcomeswithtwoDoubleDataRate3(DDR3)SmallOutlineDualInline
MemoryModule(SO-DIMM)sockets.ThegureillustratesthelocationoftheDDR3SO-
DIMMsockets:
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.
• 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.
• 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.
• 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16GBmemorycapacitycanbesupportedwith8GBoraboveDIMMs.
ASUSwillupdatethememoryQVLoncetheDIMMsareavailableinthemarket.
H81T R2.0
H81T R2.0 204-pin DDR3 DIMM sockets
DIMM_A1
DIMM_B1