Lenovo System x3250 M5 - Page 184

Table33.SupportedUDIMMpopulationperchannel
DIMMconnectors
perchannel
DIMMsinstalledin
eachchannelDIMMtypeDIMMspeed
RanksperDIMM
(anycombination)
21
UnbufferedDDR3
ECC
1600Dual-rank
22
UnbufferedDDR3
ECC
1600Dual-rank
•ThefollowingtableliststhemaximumDIMMpopulationusingrankedUDIMMs.
Table34.MaximummemorypopulationusingrankedUDIMMs(dependingonyourmodel)
NumberofUDIMMsDIMMtypeSizeTotalmemory
4Dual-rankUDIMMs
4GB16GB
4Dual-rankUDIMMs
8GB32GB
•ThefollowingtableshowstheUDIMMmemorypopulationruletooptimizethesystemperformance.
Table35.UDIMMpopulationrule
DIMMconnector1DIMMconnector2DIMMconnector3DIMMconnector4
PopulatedEmptyPopulatedEmpty
PopulatedPopulatedPopulatedPopulated
InstallingaDIMM
UsethisinformationtoinstallaDIMM.
Readthesafetyinformationin“Safety”onpagevand“Installationguidelines”onpage31.
Ifyouarereplacingaservercomponentintheserver,youneedtoslidetheserveroutfromtherack
enclosure,turnofftheserverandperipheraldevices,anddisconnectthepowercordsandallexternalcables.
Attention:Staticelectricitythatisreleasedtointernalservercomponentswhentheserverispoweredon
mightcausetheservertohalt,whichmightresultinthelossofdata.Toavoidthispotentialproblem,
alwaysuseanelectrostatic-dischargewriststraporothergroundingsystemwhenyouworkinsidethe
serverwiththepoweron.
ThefollowingillustrationshowsthelocationoftheDIMMconnectorsonthesystemboard.
170LenovoSystemx3250M5InstallationandServiceGuide