User’s Manual

1-8
Chapter 1: Product introduction
System memory
Overview
ThismotherboardcomeswithtwoDoubleDataRate4(DDR4)DualInlineMemoryModule
(DIMM)sockets.ThegureillustratesthelocationoftheDDR4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.
• DDR42666MHzandhighermemorymoduleswillrunatmax.2666MHzonIntel
®
8th
Generation6-coreorhigherprocessors;DDR42400MHzandhighermemorymodules
willrunatmax.2400MHzonIntel
®
8thGeneration4-coreprocessors.
• 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).
• Refertowww.asus.comforthelatestMemoryQVL(QualiedVendorsList).
Recommended memory conguration
*
*
*
Channel Sockets
ChannelA DIMM_A1*
ChannelB DIMM_B1*
DIMM_B1*
DIMM_A1*