Ifyoulookatthephysicalmemorymodule,ECCwillusuallyhave9 chips.NonECCwillhaveonly8 .

(sometimesmore)(orrarely,8x2=16)

(Imagecourtesyof )PugetSystems

editedApr2at6:53Mokubai 30.4k 9 74 94

answeredMar25at20:24BlueRajaDannyPflughoeft4,428 2 20 38

9chipsforthe10bitsperbyteontheECCmodule? Hennes Mar25at20:50

5

@Hennes:Youcanhave10,but9isfarmorecommon.Thememoryistypicallysplitintochunksof72bits,with64bitsofdata+8bitsoferrorcorrectionineach

chunk.See formoretechnicalinfo.(8bitsreadatoncefromeachof9datachips)

here BlueRajaDannyPflughoeft Mar25at21:38

1

Asamoregeneralrule,ifthenumberofmemorychipsaredivisibleby3thenthemoduleisECC.KronoS Mar26at15:00

Whencopyinganycontent(includingimages)you provideattribution.must Mokubai Apr2at6:51

OnaMacyoucanlookinthe applicationtodetermineECCstatusoftheComputerandeachRAMmodule.

SystemInformation

/Applications/Utilities/SystemInformation

SelectMemoryontherightpane,underthehardwaresection.

Thenwiththe"MemorySlots"listingselected.ThewindowbelowshouldshowanECCstatus.

Seepicturebelow: