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3.Notetheorientationofthecoolingshroudandthenplaceitabovetheserversothatthetabsonboth
sidesofthecoolingshroudarealignedwiththecorrespondingholesorgapsinbothsidesofthe
chassis.Then,lowerthecoolingshroudintothechassisuntilitsnapsintoposition.
Note:Ifnecessary,gentlypressthecoolingshroudonbothsidessothatthetabsonthecoolingshroud
completelyengagewithbothsidesofthechassis.
Figure34.Reinstallingthecoolingshroud
4.Reinstalltheservercoverandreconnectcablestotheserver.Formoreinformation,referto“Reinstalling
theservercoverandreconnectingcables”onpage144.
Installingorremovingamemorymodule
Note:ThememorymodulesareextremelysensitivetoESD.Ensurethatyoureadandunderstand“Handling
static-sensitivedevices”onpage62firstandcarefullyperformtheoperation.
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).
68ThinkServerRD550UserGuideandHardwareMaintenanceManual
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