Computer Hardware User Manual

Note:Theamountofusablememoryisreduced,dependingonthesystemconguration.Acertain
amountofmemorymustbereservedforsystemresources.Toviewthetotalamountofinstalledmemory
andtheamountofconguredmemory,runtheSetuputility.
Removingamemorymodule
ToremoveaDIMM,completethefollowingsteps:
1.Readthesafetyinformationin“ImportantSafetyInformation”onpage1and“Guidelinesfortrained
servicetechnicians”onpage115.
2.Turnofftheserverandperipheraldevicesanddisconnectthepowercordsandallexternalcables,if
necessary.
3.Removethecover(see“Removingandinstallingthecover”onpage119).
Attention:Toensurepropercoolingandairow,donotoperatetheserverformorethan30minutes
withthecoverremoved.
4.RemovetheDIMMairbafe(see“RemovingandinstallingtheDIMMairbafe”onpage121).
5.Carefullyopentheretainingclips2oneachendoftheDIMMconnectorandremovetheDIMM1
Attention:ToavoidbreakingtheretainingclipsordamagingtheDIMMconnectors,openandclose
theclipsgently.
6.IfyouareinstructedtoreturntheDIMM,followallpackaginginstructions,anduseanypackaging
materialsforshippingthataresuppliedtoyou.
Installingamemorymodule
•ThemaximumoperatingspeedoftheserverisdeterminedbytheslowestDIMMintheserver.
•IfyouinstallapairofDIMMsinDIMMconnectors2and5,thesizeandspeedoftheDIMMsthatyou
installinDIMMconnectors2and5mustmatcheachother.However,theydonothavetobethesame
sizeandspeedastheDIMMsthatareinstalledinDIMMconnectors1and4.
•YoucanusecompatibleDIMMsfromvariousmanufacturersinthesamepair.
•WhenyouinstallorremoveDIMMs,theservercongurationinformationchanges.Whenyourestartthe
server,thesystemdisplaysamessagethatindicatesthatthememorycongurationhaschanged.
See“System-boardinternalconnectors”onpage108
forthelocationoftheDIMMconnectorsonthe
systemboard.
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