Lenovo ThinkServer RD640 - Page 102

Figure48.CPU1DIMMs
Table1.Memorymoduleinstallationrulesforserverswithonemicroprocessor
CPU1
DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3
OneDIMM
X
TwoDIMMsXX
Three
DIMMs
XXX
FourDIMMsXXXX
SixDIMMs
XXXXXX
Eight
DIMMs
XXXXXXXX
Twelve
DIMMs
XXXXXXXXXXXX
Note:ThetwelveDIMMsconfigurationissupportedonlywhenyouareusingnormalRDIMMs.
Thefollowingtableprovidesinformationaboutthememorymoduleinstallationrulesforserversthathave
twomicroprocessors(CPU1andCPU2)installed.The“X”markindicatesthememoryslot(s)intowhichthe
memorymodule(s)shouldbeinstalledindifferentsituations.
Note:Theinstalledmemorymodulesmustbethesametypewiththesamerank,voltage,andfrequency.
88ThinkServerRD640UserGuideandHardwareMaintenanceManual