Lenovo ThinkServer RD240 - Installing a Memory Module

Table8.DIMMinstallationruleswhenasinglemicroprocessor(CPU0)isinstalled
DIMMslotOneDIMMTwoDIMMsThreeDIMMsFourDIMMs
CPU0DIMMCHA1
X,4
CPU0DIMMCHA0
XX,1X,1X,1
CPU0DIMMCHB0
X,2X,2X,2
CPU0DIMMCHC0
X,3X,3
Note:InstallingDIMMsonchannelAandchannelBofCPU0shouldenableChannelMirroringMode.Thismode
requiresthatyouinstalltheDIMMsinpair,andtheDIMMinstallationforChannelMirroringModeisoneDIMMon
CPU0DIMMCHA0andoneDIMMonCPU0DIMMCHB0whenasinglemicroprocessor(CPU0)isinstalled.
Table9.DIMMinstallationruleswhentwomicroprocessors(CPU0andCPU1)areinstalled
DIMMslotTwoDIMMsFourDIMMsSixDIMMsEightDIMMs
CPU0DIMMCHA1
X,7
CPU0DIMMCHA0
X,1X,1X,1X,1
CPU0DIMMCHB0
X,3X,3X,3
CPU0DIMMCHC0
X,5X,5
CPU1DIMMCHA1
X,8
CPU1DIMMCHA0
X,2X,2X,2X,2
CPU1DIMMCHB0
X,4X,4X,4
CPU1DIMMCHC0
X,6X,6
Note:FortheChannelMirroringMode,itrequiresthatyouinstalltheDIMMsinpair,andtheDIMMinstallationfor
ChannelMirroringModewhentwomicroprocessors(CPU0andCPU1)areinstalledisshownbelow.Followthis
sequenceratherthanthesequencelistedaboveifyouwanttousetheChannelMirroringMode.
1.Pair1:installaDIMMonCPU0DIMMCHA0andtheninstallaDIMMonCPU0DIMMCHB0.
2.Pair2:installaDIMMonCPU1DIMMCHA0andtheninstallaDIMMonCPU1DIMMCHB0.
Installingamemorymodule
Attention:Donotopenyourserverorattemptanyrepairbeforereadingandunderstandingthe“Safetyinformation”
onpageiiiand“Guidelines”onpage35.
Thissectionprovidesinstructionsonhowtoinstallamemorymodule.
Toinstallamemorymodule,dothefollowing:
1.Removeallmediafromthedrivesandturnoffallattacheddevicesandtheserver.Then,disconnectall
powercordsfromelectricaloutletsanddisconnectallcablesthatareconnectedtotheserver.
2.Removetheservercover.SeeRemovingtheservercover.
3.Locatetheappropriatememoryslotonthesystemboardintowhichyouwillinstallthememorymodule.
Tooptimizesystemperformance,followtherelatedmemorymoduleinstallationrulesandinstallthe
memorymoduleintoamemoryslotstartingwiththememorymodulefarthestfromthemicroprocessor.
SeeMemorymoduleinstallationrules.
4.Opentheretainingclipsofthememoryslotintowhichyouwanttoinstallthememorymodule.
Chapter7.Installing,removing,orreplacinghardware39