
Thefollowingillustrationhelpsyoutolocatethememoryslotsonthesystemboard.Thefollowingillustration
showsthesystemboardwithtwoinstalledmicroprocessors(alsoknownasCPU).
CPU1 DIMMC1
CPU1 DIMMC2
CPU1 DIMMC3
CPU1 DIMMD1
CPU1 DIMMD2
CPU1 DIMMD3
CPU1 DIMMB3
CPU1 DIMMB2
CPU1 DIMMB1
CPU1 DIMMA3
CPU1 DIMMA2
CPU1 DIMMA1
CPU2 DIMMC1
CPU2 DIMMC2
CPU2 DIMMC3
CPU2 DIMMD1
CPU2 DIMMD2
CPU2 DIMMD3
CPU2 DIMMB3
CPU2 DIMMB2
CPU2 DIMMB1
CPU2 DIMMA3
CPU2 DIMMA2
CPU2 DIMMA1
Figure50.Memoryslotsonthesystemboard
Thefollowingtableprovidesinformationaboutthememorymoduleinstallationrulesforserversthathave
onlyonemicroprocessor(CPU1)installed.The“X”markindicatesthememoryslotsintowhichthememory
modulesshouldbeinstalledindifferentsituations.
Table2.Memorymoduleinstallationrulesforserverswithonemicroprocessor
CPU1
DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3
1DIMMX
2DIMMsXX
4DIMMsXXXX
8DIMMsXXXXXXXX
12DIMMsXXXXXXXXXXXX
Thefollowingtableprovidesinformationaboutthememorymoduleinstallationrulesforserversthathave
twomicroprocessors(CPU1andCPU2)installed.The“X”markindicatesthememoryslotsintowhichthe
memorymodulesshouldbeinstalledindifferentsituations.
Table3.Memorymoduleinstallationrulesforserverswithtwomicroprocessors
CPU1DIMMCPU2DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3A1A2A3B1B2B3
C1C2C3
D1D2D3
2
DIMMs
XX
4
DIMMs
XXXX
8
DIMMs
XXXXXXXX
80ThinkServerRD650UserGuideandHardwareMaintenanceManual
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