Lenovo System x3250 M5 - Installing a DIMM

•ThememorychannelsrunatthelowestcommonfrequencyoftheDIMMsinstalled.
•TheUDIMMoptionsthatareavailablefortheserverare1GB,2GB,4GB,and8GB(whenavailable)
DIMMs.
•Theserversupportsuptotwosingle-rankordual-rankUDIMMsperchannel.
•ThefollowingtableliststhesupportedUDIMMpopulation.
Table6.SupportedUDIMMpopulationperchannel
DIMMconnectors
perchannel
DIMMsinstalledin
eachchannelDIMMtypeDIMMspeed
RanksperDIMM
(anycombination)
21
UnbufferedDDR3
ECC
1600Dual-rank
22
UnbufferedDDR3
ECC
1600Dual-rank
•ThefollowingtableliststhemaximumDIMMpopulationusingrankedUDIMMs.
Table7.MaximummemorypopulationusingrankedUDIMMs(dependingonyourmodel)
NumberofUDIMMsDIMMtypeSizeTotalmemory
4Dual-rankUDIMMs
4GB16GB
4Dual-rankUDIMMs
8GB32GB
•ThefollowingtableshowstheUDIMMmemorypopulationruletooptimizethesystemperformance.
Table8.UDIMMpopulationrule
DIMMconnector1DIMMconnector2DIMMconnector3DIMMconnector4
PopulatedEmptyPopulatedEmpty
PopulatedPopulatedPopulatedPopulated
InstallingaDIMM
UsethisinformationtoinstallaDIMM.
Readthesafetyinformationin“Safety”onpagevand“Installationguidelines”onpage31.
Ifyouareinstallinganoptionaldeviceintheserver,youneedtoslidetheserveroutfromtherackenclosure,
turnofftheserverandperipheraldevices,anddisconnectthepowercordsandallexternalcables.
Attention:Staticelectricitythatisreleasedtointernalservercomponentswhentheserverispoweredon
mightcausetheservertohalt,whichmightresultinthelossofdata.Toavoidthispotentialproblem,
alwaysuseanelectrostatic-dischargewriststraporothergroundingsystemwhenyouworkinsidethe
serverwiththepoweron.
ThefollowingillustrationshowsthelocationoftheDIMMconnectorsonthesystemboard.
Chapter2.Installingoptionaldevices57