2Gb RAM sticks in an iMac Rev. B?

Discussion in 'Mac Pro' started by Naimfan, Nov 16, 2005.

  1. Naimfan macrumors 68040


    Jan 15, 2003

    I'm curious to know if I could install a pair of 2Gb RAM sticks in my iMac Rev. B. Would the memory controller recognize them? I ask because I remember my trusty old Pismo stating that 512 Mb RAM was tops and that the memory controller wouldn't recognize a 512 Mb stick. However, I ran it for years with a full Gb of RAM (probably what made it last so long!).

    Second question--assuming the 2Gb sticks would work, would it make much difference from the 2Gb of RAM I have in it now?


  2. yenko macrumors 6502a

    Aug 29, 2005
    Best I can figure is Apple doesn't recommend it. ;)
    It seems that the limit is 1 Gig per slot. :(
    You can experiment, but you're on your own with that.
    Maybe someone has already tried it here and would be willing to respond in these forums to let you know if they were successful ..... or not!:cool:

    To answer the second question: If it does work you're doubling the RAM. It probably would make a difference, although I'm not sure how much. Remember this; we're making an assumption here. The likely answer is it can't be done in the first place.
  3. whocares macrumors 65816


    Oct 9, 2002
    I can't answer your question, but have one myself ;)

    Is is a (G3) G4 or a G5 iMac? Probably a G5 but it might help if you specify. :)
  4. mikeyredk macrumors 65816

    Mar 13, 2003
    It has to meet spec though iMac G5 computers work with memory modules (DIMMs) that meet all of these criteria: PC3200, unbuffered, nonparity, 184-pin, 400Mhz DDR SDRAM
  5. theanimaster macrumors 6502


    Oct 7, 2005
    Does it really?

    I've had my eyes on the Kingston KTH-DL385/4G, which is 2GB PC3200 DIMMS with parity and everything... thing is Apple says theyre not supported... the same way they said that screen-spanning in the rev B iMac was not "supported". Does this mean that they just don't want you to have a powerful G5 desktop in your iMac as opposed to shelling out extra for a PRO mac desktop? Apple's marketing is a bit slippery on these terms.

    Apple was also saying that 640MB was tops for the 12" Albook. Bull. Because of this "mis-information" I had bought just a 512MB SIMM for my Powerbook instead of buying a similarly priced 1GB SIMM which I found indeed DOES work on it (as opposed to what Apple advertised).

    I'm guessing you can install up to 4GB of RAM in your iMac, unbuffered or not. I'll assume the system will just ignore the extra error-checking features on the RAM, that's all - but otherwise it should work. If I had 'nuff money to spend I'd go and get that $868 set of RAM from Kingston.

    As for performance... yes it would definitely improve... and it should be far better than my uprgade from 1.5GB to 2GB.

    Good luck!
  6. dcv macrumors G3

    May 24, 2005
    This is an old thread.

    To the OP - did you ever try out the 4GB?

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