Lenovo x3250 m6 - Page 112

andtheamountofconfiguredmemory,runSetupUtility.Foradditionalinformation,see“Configuring
theserver”onpage26
.
•ThespecificationsofaDDR4DIMMareonalabelontheDIMM,inthefollowingformat:
gggGBpheRxffPC4-wwwwaa-mccd-bb
where:
–gggGBisthetotalcapacityoftheDIMM(forexample,1GB,2GB,or4GB)
–pheRisthenumberofpackageranksandnumberoflogicalranksperpackagerank
phasthefollowingvariables:
–1=1packagerankofSDRAMsinstalled
–2=2packageranksofSDRAMsinstalled
–3=3packageranksofSDRAMsinstalled
–4=4packageranksofSDRAMsinstalled
–he:blankformonolithicDRAMsandothersformodulesusingstackedDRAM.
histheDRAMpackagetype.Ithasthefollowingvariables:
–D=multi-loadDRAMstacking(DDP)
–Q=multi-loadDRAMstacking(QDP)
–D=singleloadDRAMstacking(3DS)
e:blankforSDP,DDPandQDPandothersformodulesusing3DSstacks,logicalranksperpackage
rank
Ithasthefollowingvariables:
–2=2logicalranksineachpackagerank
–4=4logicalranksineachpackagerank
–8=8logicalranksineachpackagerank
–xffisthedeviceorganizationorbitwidthofSDRAMs(forexample,x4,x8,orx16)
–x4=x4organization(fourDQlinesperSDRAM)
–x8=x8organization
–x16=x16organization
–wwwwistheDIMMspeed,inMBps(forexample,2133,2400,2666,2933,or3200)
aaistheSDRAMspeedgrade
–mistheDIMMtype
–E=UnbufferedDIMM(UDIMM)(x64-bitprimarydatabus)withECC(x8-bitmoduledatabus)
–L=LoadReducedDIMM(LRDIMM)(x64-bitprimarydatabus)withECC(x8-bitmoduledatabus)
–R=RegisteredDIMM(RDIMM)(x64-bitprimarydatabus)withECC(x8-bitmoduledatabus)
–U=UnbufferedDIMMwithnoECC(x64-bitprimarydatabus)
ccisthereferencedesignfileforthedesignoftheDIMM
distherevisionnumberoftheusedreferencedesign
–bbistheJEDECSPDRevisionEncodingandAdditionslevel
TolocatetheDIMMslotsonthesystemboard,see“System-boardconnectors”onpage21
.
ThefollowingsectionsprovideadditionalinformationspecifictounbufferedDIMMsthatyoumustconsider.
98LenovoSystemx3250M6InstallationandServiceGuide