Lenovo x3650 M4 BD 5466 - Memory Mirroring

Table6.Non-mirroring(normal)modeDIMMinstallationsequence
NumberofinstalledmicroprocessorsDIMMconnectorpopulationsequence
18,6,1,3,7,5,2,4
28,16,6,14,1,9,3,11,7,15,5,13,2,10,4,12
ThefollowingtablesliststheDIMMconnectorsoneachmemorychannel.
Table7.DIMMconnectorsoneachmemorychannel
Numberofinstalled
microprocessorsMemorychannelDIMMconnectors
Channel1
7,8
Channel2
5,6
Channel3
1,2
Microprocessor1
Channel4
3,4
ThefollowingtableliststheDIMMconnectorsoneachmemorychannel.
Table8.DIMMconnectorsoneachmemorychannel
Numberofinstalled
microprocessorsMemorychannelDIMMconnectors
Channel1
15,16
Channel2
13,14
Channel3
9,10
Microprocessor2
Channel4
11,12
Memorymirroring
Memory-mirroringmodereplicatesandstoresdataontwopairsofDIMMswithintwochannels
simultaneously.
Memory-mirroringmodereplicatesandstoresdataontwopairsofDIMMswithintwochannels
simultaneously.Ifafailureoccurs,thememorycontrollerswitchesfromtheprimarypairofmemoryDIMMs
tothebackuppairofDIMMs.YoumustenablememorymirroringthroughtheSetuputility.Fordetails
aboutenablingmemorymirroring,see“UsingtheSetuputility”onpage87
.Whenyouusethememory
mirroringfeature,considerthefollowinginformation:
•DIMMsmustbeinstalledinpairs.TheDIMMsineachpairmustbethesamesizeandtype.
•Themaximumavailablememoryisreducedtoonethirdoftheinstalledmemorywhenmemorymirroring
isenabled.Forexample,ifyouinstall96GBofmemory,only32GBofaddressablememoryisavailable
whenyouusememorymirroring.
•Channel1DIMMconnectors1,2,7,and8arenotusedinmemory-mirroringmode.
ThefollowingtableliststheinstallationsequenceforinstallingDIMMsinmemory-mirroringmode.
58LenovoSystemx3650M4BDInstallationandServiceGuide