Lenovo System x3250 M5 - Memory module installation

Ifyouhaveotherdevicestoinstall,dosonow.Otherwise,goto“Completingtheinstallation”onpage78.
Memorymoduleinstallation
ThefollowingnotesdescribethetypesofDIMMsthattheserversupportsandotherinformationthatyou
mustconsiderwhenyouinstallDIMMs.
•ConfirmthattheserversupportstheDIMMthatyouareinstalling(see
http://www.lenovo.com/us/en/serverproven/).
•WhenyouinstallorremoveDIMMs,theserverconfigurationinformationchanges.Whenyourestartthe
server,thesystemdisplaysamessagethatindicatesthatthememoryconfigurationhaschanged.You
canusetheSetuputilitytoviewtheserverconfigurationinformation,see“UsingtheSetuputility”on
page89
formoreinformation.
•Theserversupportsonlyindustry-standarddouble-data-rate3(DDR3),1333or1600MHz,PC3L-12800
(single-rankordual-rank),unbufferedorsynchronousdynamicrandom-accessmemory(SDRAM)dual
inlinememorymodules(DIMMs)witherrorcorrectingcode(ECC).
•Theserversupportsamaximumoffoursingle-rankordual-rankunbufferedDIMMs.
•ThemaximumoperatingspeedoftheserverisdeterminedbytheslowestDIMMintheserver.
•IfyouinstallapairofDIMMsinDIMMconnectors1and3,thesizeandspeedoftheDIMMsthatyou
installinDIMMconnectors1and3mustmatcheachother.However,theydonothavetobethesame
sizeandspeedastheDIMMsthatareinstalledinDIMMconnectors2and4.
•YoucanusecompatibleDIMMsfromvariousmanufacturersinthesamepair.
•ThespecificationsofaDDR3DIMMareonalabelontheDIMM,inthefollowingformat.
•gGBeRxfPC3v-wwwwwm-aa-bb-cc
where:
–gGBisthetotalcapacityoftheDIMM(forexample,1GB,2GB,or4GB)
–eRisthenumberofranks
–1R=single-rank
–2R=dual-rank
–4R=quad-rank
–xfisthedeviceorganizationorbitwidth(forexample,x4,x8,orx16)
–x4=x4organization(4DQlinesperSDRAM)
–x8=x8organization
–x16=x16organization
–vistheSDRAMandsupportcomponentsupplyvoltage(VDD)
–Blank=1.5Vspecified
–L=1.35Vspecified,1.5Voperable
Note:Valuesforthesevoltagesare‘specified’whichmeansthedevicecharacteristicssuchastiming
aresupportedatthisvoltage.Valuesare‘operable’whichmeansthatthedevicescanbeoperated
safelyatthisvoltage.However,devicecharacteristicssuchastimingmaynotbeguaranteed.All
devicesmustbe‘tolerant’ofthehighestDDR3nominalvoltageof1.5V,meaningthattheymaynot
operateat1.5Vbutmaybepoweredatthatvoltagewithoutdamagetothedevices.
–wwwwwistheDIMMbandwidth,inMBps
•6400=6.40GBps(DDR3-800SDRAMs,8-byteprimarydatabus)
•8500=8.53GBps(DDR3-1066SDRAMs,8-byteprimarydatabus)
Chapter2.Installingoptionaldevices55