Lenovo System x3650 M4 HD - Page 232

ThefollowingdiagramliststheDIMMconnectorsoneachmemorychannel.
Figure143.Connectorsoneachmemorychannel
Followtheinstallationsequenceforranksparingmode:
•Installatleastonequad-rankDIMMinachannel.
•Installatleasttwosingle-rankordual-rankDIMMsinachannel.
Table21.MemoryranksparingmodeDIMMpopulationsequence
NumberofDIMMs
Numberofinstalled
microprocessorDIMMconnector
FirstpairofDIMMs
11,2
SecondpairofDIMMs
14,5
ThirdpairofDIMMs
18,9
FourthpairofDIMMs
111,12
FifthpairofDIMMs
17,10
SixthpairofDIMMs
13,6
SeventhpairofDIMMs
213,14
EighthpairofDIMMs
216,17
NinthpairofDIMMs
220,21
TenthpairofDIMMs
223,24
EleventhpairofDIMMs
219,22
TwelfthpairofDIMMs
215,18
Note:DIMMconnectors3,6,7,10,15,18,19,and22arenotusedinmemoryranksparingmodewhenUDIMMs
areinstalledintheserver.
Replacingamemorymodule
Usethisinformationtoreplaceamemorymodule.
Step1.Readthesafetyinformationthatbeginson“Safety”onpagevand“Installationguidelines”
onpage34.
Step2.Turnofftheserverandperipheraldevicesanddisconnectthepowercordsandallexternalcables,
ifnecessary.
Step3.Removethecover(see“Removingthecover”onpage195).
Step4.RemovePCIriser-cardassembliesifnecessary(see“RemovingaPCIriser-cardassembly”on
page221).
Step5.Removetheairbaffle(see“Removingtheairbaffle”onpage199).
220LenovoSystemx3650M4HDInstallationandServiceGuide