User Guide

43Chapter 3 Making a Good Thing Better
Installing Memory
YourMacProcomeswithaminimumof3GBofmemoryinthesingle-processor
model,oraminimumof6GBofmemoryinthedual-processormodel,installedas1GB
unbueredECCdualinlinememorymodules(UDIMMs).
AllinstalledUDIMMsmustmeetthesespecications:
Â PC3-10600E,1333MHz,DDR3SDRAMUDIMMs
Â Error-correctingcode(ECC)
Â 72-bitwide,240-pinECCmodules
Â 36ICsmaximumperECCUDIMM
NOTICE: ApplerecommendsthatyouuseApple-approvedDIMMs.DIMMsfromolder
MaccomputerscannotbeusedinyourMacPro.YoucanpurchaseApple-branded
memoryonlinefromtheAppleStoreatwww.apple.com/store.
WhenpurchasingDIMMsforuseinMaccomputers,makesurethatthememory
vendorconformstotheJointElectronDeviceEngineeringCouncil(JEDEC)
specication.CheckwithyourmemoryvendortoensurethattheDIMMssupport
thecorrecttimingmodesandthattheSerialPresenceDetect(SPD)featurehasbeen
programmedproperly,asdescribedintheJEDECspecication.
Note: AlthoughthememoryspeedoftheUDIMMSis1333MHz,theywilloperateat
1066MHzor1333MHzdependingontheprocessorinthecomputer.