Lenovo x3250 m6 - Installing a DIMM

UnbufferedDIMMs(UDIMMs)
ThefollowingtipsprovideinformationthatyoumustconsiderwhenyouinstallUDIMMs.
•ThememorychannelsrunatthelowestcommonfrequencyoftheDIMMsinstalled.
•TheUDIMMoptionsthatareavailablefortheserverare4GB,8GB,and16GBDIMMs.
•Theserversupportsuptotwosingle-rankordual-rankUDIMMsperchannel.
•ThefollowingtableliststhesupportedUDIMMpopulation.
Table25.SupportedUDIMMpopulationperchannel
DIMMslotsper
channel
DIMMsinstalledin
eachchannelDIMMtypeDIMMspeed
RanksperDIMM
(anycombination)
21
UnbufferedDDR4
ECC
2133Dual-rank
22
UnbufferedDDR4
ECC
2133Dual-rank
•ThefollowingtableliststhemaximumDIMMpopulationusingrankedUDIMMs.
Table26.MaximummemorypopulationusingrankedUDIMMs(dependingonyourmodel)
NumberofUDIMMsDIMMtypeSizeTotalmemory
4Dual-rankUDIMMs
16GB64GB
•ThefollowingtableshowstheUDIMMmemoryinstallationsequencetooptimizethesystemperformance.
Table27.DIMMinstallationsequence
NumberofDIMMsInstallationsequence(DIMMslots)
FirstpairofDIMMs
3,1
SecondpairofDIMMs
4,2
InstallingaDIMM
ToinstallaDIMM,dothefollowing:
Step1.Turnofftheserver.Then,disconnectallexternalcablesandremoveallperipheraldevices.
Step2.Removetheservercover.See“Removingtheservercover”onpage88.
Step3.Removetheairbaffle.See“Removingtheairbaffle”onpage90.
Step4.LocatetheDIMMslotsonthesystemboard.Then,referto“UnbufferedDIMMs(UDIMMs)”on
page99andensurethatyouobservetheinstallationrulesandsequence.
Step5.Touchthestatic-protectivepackagethatcontainstheDIMMtoanyunpaintedmetalsurfaceonthe
outsideoftheserver.Then,removetheDIMMfromthepackage.
Chapter7.Removingandinstallingservercomponents99