Lenovo ThinkServer RD640 - Installing a Memory Module

Figure49.CPU1DIMMsandCPU2DIMMs
Table2.Memorymoduleinstallationrulesforserverswithtwomicroprocessors
CPU1DIMMCPU2DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3A1A2B1B2
C1C2
D1D2
Two
DIMMs
XX
Four
DIMMs
XXXX
Six
DIMMs
XXXXXX
Eight
DIMMs
XXXXXXXX
Twelve
DIMMs
XXXXXXXXXXXX
Sixteen
DIMMs
XXXXXXXXXXXXXXXX
Twenty
DIMMs
XXXXXXXXXXXXXXXXXXXX
Note:ThetwentyDIMMsconfigurationissupportedonlywhenyouareusingnormalRDIMMs.
Installingamemorymodule
Attention:Donotopenyourserverorattemptanyrepairbeforereadingandunderstanding“Safetyinformation”
onpageiiiand“Guidelines”onpage75.
Thistopicprovidesinstructionsonhowtoinstallamemorymodule.
Chapter6.Installing,removing,orreplacinghardware89