Lenovo ThinkServer RD550 - Installing or Removing a Memory Module

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3.Notetheorientationofthecoolingshroudandthenplaceitabovetheserversothatthetabsonboth

sidesofthecoolingshroudarealignedwiththecorrespondingholesorgapsinbothsidesofthe

chassis.Then,lowerthecoolingshroudintothechassisuntilitsnapsintoposition.

Note:Ifnecessary,gentlypressthecoolingshroudonbothsidessothatthetabsonthecoolingshroud

completelyengagewithbothsidesofthechassis.

Figure34.Reinstallingthecoolingshroud

4.Reinstalltheservercoverandreconnectcablestotheserver.Formoreinformation,referto“Reinstalling

theservercoverandreconnectingcables”onpage152.

Installingorremovingamemorymodule

Note:ThememorymodulesareextremelysensitivetoESD.Ensurethatyoureadandunderstand“Handling

static-sensitivedevices”onpage60ﬁrstandcarefullyperformtheoperation.

Memorymoduleinstallationrules

Yourserverhas24memoryslots.

•Eachslotsupports4GB,8GB,16GB,and32GBdoubledatarate4registereddualinlinememory

modules(DDR4RDIMMs).

•Eachslotsupports32GB,64GB,or128GBDDR4load-reduceddualinlinememorymodules(LRDIMMs).

•Yourserversupportsupto12memorymoduleswhenonemicroprocessorisinstalledandupto24

memorymoduleswhentwomicroprocessorsareinstalled.

•TheminimumsystemmemoryforRDIMMsis4GB(onlyonemicroprocessorinstalledandonlyone4

GBRDIMMinstalledintheCPU1DIMMA1slot).

•TheminimumsystemmemoryforLRDIMMsis32GB(onlyonemicroprocessorinstalledandonlyone32

GBLRDIMMinstalledintheCPU1DIMMA1slot).

•ThemaximumsystemmemoryforRDIMMsis768GB(twomicroprocessorsinstalledandone32GB

RDIMMinstalledineachofthe24memoryslots).

•ThemaximumsystemmemoryforLRDIMMsis3TB(twomicroprocessorsinstalledandone128GB

LRDIMMinstalledineachofthe24memoryslots).

66ThinkServerRD550UserGuideandHardwareMaintenanceManual

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