Computer Hardware User Manual

Thefollowingtableexplainsthememorymoduleinstallationrulesforserversthathaveonlyone
microprocessor(CPU1)installed.The“X”markindicatesthememoryslotsintowhichthememorymodules
shouldbeinstalledindifferentsituations.
Notes:
•Allmemorymodulestobeinstalledonaservermustbethesametype.
•Whenyouinstallmemorymoduleswithdifferentranksinonechannel,startfromthefarthestmemoryslot
inthechannelandinstallthememorymodulethathasthemostranksrst.
•When1.35Vmemorymodulesand1.50Vmemorymodulesareinstalledintothememoryslotsforthe
samemicroprocessor,allthememorymodulesrunat1.50V.
•Whenmemorymoduleswithdifferentfrequenciesareinstalledintothememoryslotsforthesame
microprocessor,allthememorymodulesrunatthelowestfrequency.
•Itisrecommendedthatyouinstallthehigh-frequencymemorymodulesintothememoryslotsforthe
samemicroprocessortoensurehighperformance.
Figure41.CPU1DIMMs
Table3.Memorymoduleinstallationrulesforserverswithonemicroprocessor
CPU1DIMM
A1A2A3B1B2B3
C1C2C3
D1D2D3
OneDIMM
X
TwoDIMMsXX
ThreeDIMMsXXX
FourDIMMsXXXX
SixDIMMs
XXXXXX
EightDIMMsXXXXXXXX
TwelveDIMMsXXXXXXXXXXXX
Note:The12DIMMscongurationissupportedonlywhenyouareusingnormalRDIMMs.
Thefollowingtableexplainsthememorymoduleinstallationrulesforserversthathavetwomicroprocessors
(CPU1andCPU2)installed.The“X”markindicatesthememoryslotsintowhichthememorymodules
shouldbeinstalledindifferentsituations.
Chapter6.Installing,removing,orreplacinghardware77