Computer Hardware User Manual

Replacingamemorymodule(DIMM)
Toreplaceadualinlinememorymodule(DIMM),usethefollowinginformationandprocedures:
Supportedmemorytypes
Followingisinformationthatdescribesthetypesofdualinlinememorymodules(DIMMs)thattheserver
supportsandotherinformationthatyoumustconsiderwhenyouinstallDIMMs(see“System-boardinternal
connectors”onpage108forthelocationoftheDIMMconnectors).
•Theserversupportsonlyindustry-standarddouble-data-rate3(DDR3),1066or1333MHz,PC3-6400,
PC3-8500,orPC3-10600(single-rank,dual-rank,orquad-rank),registeredorunbuffered,synchronous
dynamicrandom-accessmemory(SDRAM)dualinlinememorymodules(DIMMs)witherrorcorrecting
code(ECC).Seehttp://www.lenovo.com/thinkserverforalistofsupportedmemorymodulesfortheserver.
–ThespecicationsofaDDR3DIMMareonalabelontheDIMM,inthefollowingformat.
gggeRxff-PC3-wwwwwm-aa-bb-cc
where:
–gggisthetotalcapacityoftheDIMM(forexample,1GB,2GB,or4GB)
–eisthenumberofranks
1=single-rank
2=dual-rank
4=quad-rank
–ffisthedeviceorganization(bitwidth)
4=x4organization(4DQlinesperSDRAM)
8=x8organization
16=x16organization
–wwwwwistheDIMMbandwidth,inMBps
6400=6.40GBps(PC3-800SDRAMs,8-byteprimarydatabus)
8500=8.53GBps(PC3-1066SDRAMs,8-byteprimarydatabus)
10600=10.66GBps(PC3-1333SDRAMs,8-byteprimarydatabus)
12800=12.80GBpsPC3-1600SDRAMs,8-byteprimarydatabus)
–mistheDIMMtype
E=UnbufferedDIMM(UDIMM)withECC(x72-bitmoduledatabus)
R=RegisteredDIMM(RDIMM)
U=UnbufferedDIMMwithnoECC(x64-bitprimarydatabus)
–aaistheCASlatency,inclocksatmaximumoperatingfrequency
–bbistheJEDECSPDRevisionEncodingandAdditionslevel
–ccisthereferencedesignleforthedesignoftheDIMM
–distherevisionnumberofthereferencedesignoftheDIMM
•TheserversupportsunbufferedDIMMs(UDIMM)orregisteredDIMMs(RDIMM).
•Theserversupportsamaximumofsixsingle-rankordual-rankDIMMs,dependingonthetypeofDIMM
youinstallintheserver.
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