1-8
Chapter 1: Product introduction
System memory
Overview
ThismotherboardcomeswithtwoDoubleDataRate4(DDR4)SmallOutlineDualInline
MemoryModule(SO-DIMM)sockets.ThegureillustratesthelocationoftheDDR4SO-
DIMMsockets:
Channel
Sockets
ChannelA DIMM_A1
ChannelB DIMM_B1
• YoumayinstallvaryingmemorysizesinChannelAandChannelB.Thesystem
mapsthetotalsizeofthelower-sizedchannelforthedual-channelconguration.Any
excessmemoryfromthehigher-sizedchannelisthenmappedforsingle-channel
operation.
• AlwaysinstalltheDIMMSwiththesameCASLatency.Foranoptimumcompatibility,
werecommendthatyouinstallmemorymodulesofthesameversionordatacode
(D/C)fromthesamevendor.Checkwiththevendortogetthecorrectmemory
modules.
• Whenyouinstallonlyonememorymodule,installittoDIMM_A1slotforthe
motherboardtoworkproperly.
• Thismotherboardsupports1.2VDDR4DIMMs.
• Duetothememoryaddresslimitationon32-bitWindows
®
OS,whenyouinstall4GB
ormorememoryonthemotherboard,theactualusablememoryfortheOScanbe
about3GBorless.Foreffectiveuseofmemory,werecommendthatyoudoanyofthe
following:
- Useamaximumof3GBsystemmemoryifyouareusinga32-bitWindows
®
OS.
- Installa64-bitWindows
®
OSifyouwanttoinstall4GBormoreonthe
motherboard.
- Formoredetails,refertotheMicrosoft
®
supportsiteathttp://support.microsoft.
com/kb/929605/en-us.
VisittheASUSwebsiteatwww.asus.comforthelatestQVL.
DIMM_A1
DIMM_B1
Installing a DIMM
1 2
To remove a DIMM
B
A
B
B
A
A
A