Computer Hardware User Manual

Note:TodeterminethetypeofaDIMM,seethelabelontheDIMM.Theinformationonthelabelisinthe
formatxxxxxnRxxxPC3-xxxxx-xx-xx-xxx.Thenumeralinthesixthnumericalpositionindicateswhether
theDIMMissingle-rank(n=1)ordual-rank(n=2).
•TheserversupportsuptotwoUDIMMsorthreeRDIMMsperchannel.Thefollowingtableshowsan
exampleofthemaximumamountofmemorythatyoucaninstall,usingrankedDIMMs.
UnbufferedDIMMs(UDIMMs)
ThefollowingnotesprovideinformationthatyoumustcongurewhenyouinstallUDIMMs:
•ThememorychannelsrunatthefastestcommonfrequencyoftheDIMMsinstalled.
•DonotusebothUDIMMsandRDIMMsinthesameserver.
•UsingECCandnon-ECCUDIMMsintheserverwillcausetheservertoruninnon-ECCmode.
•TheUDIMMoptionsthatareavailablefortheserverare1GB,2GB,and4GB(whenavailable)DIMMs.
•Youcaninstallamaximumof16GBofmemoryinsomeservermodelswhenyouuseUDIMMs.
•Theserversupportsuptotwosingle-rankordual-rankUDIMMsperchannel.
•DIMMslots3and6arenotsupportedwhenyouinstallUDIMMsintheserver.DonotinstallDIMMsin
theseconnectors.
•ThefollowingtableliststhesupportedUDIMMpopulation.
Table8.SupportedUDIMMpopulationperchannel
DIMMconnectors
perchannel
DIMMsinstalledin
eachchannelDIMMtypeDIMMspeed
RanksperDIMM
(anycombination)
21
UnbufferedDDR3
ECC
1066,1333
Single-rank,
dual-rank
22
UnbufferedDDR3
ECC
1066,1333
Single-rank,
dual-rank
•ThefollowingtableliststhemaximumDIMMpopulationusingrankedUDIMMs.
Table9.MaximummemorypopulationusingrankedUDIMMs(dependingonyourmodel)
NumberofUDIMMsDIMMtypeSizeTotalmemory
4
Single-rankUDIMMs1GB4GB
4
Single-rankUDIMMs2GB8GB
4Dual-rankUDIMMs
2GB8GB
4Dual-rankUDIMMs
4GB(whenavailable)16GB
•ThefollowingtableshowstheUDIMMmemorypopulationruletooptimizethesystemperformance.
Table10.UDIMMpopulationrulefordual-channelsymmetricmode
DIMM
connector1
DIMM
connector2
DIMM
connector3
DIMM
connector4
DIMM
connector5
DIMM
connector6
PopulatedEmptyEmptyEmptyEmptyEmpty
PopulatedEmptyEmptyPopulatedEmptyEmpty
PopulatedPopulatedEmptyPopulatedPopulatedEmpty
RegisteredDIMMs(RDIMMs)
ThefollowingnotesprovideinformationthatyoumustconsiderwhenyouinstallRDIMMs:
Chapter6.ReplacingFRUs123