Powermac G5 Ram Query

Discussion in 'Macintosh Computers' started by nickgoldman, Dec 5, 2004.

  1. nickgoldman macrumors member

    Dec 2, 2004
    A friend has a 512mb ram module that he has taken out his powermac g5 and replaced with something higher I'm confused about this pairs thing
    Can I put only 1 module in or would I be better off getting 2 256mb modules elsewhere.
    Will it make a huge impact on the speed

    Thanks Nick
  2. Blue Velvet Moderator emeritus

    Jul 4, 2004
    Inside the G5 powermac are 2 banks of slots for RAM.

    Install matched pairs of RAM going outwards from the centre, 1 of the same kind in each slot.

    So in our work machines we have in each bank going outwards from the centre.

    Slot 1: 256
    Slot 2: 512
    Slot 3: 512
    Slot 4: ---

    (2 x banks = 2.5gb)
  3. cmvsm macrumors 6502a


    Nov 12, 2004
    You'd be better off installing two 256MB sticks than one 512MB stick. One will work but not as well as two. Barefeats did a comparison and it was clear that two sticks of memory are utilized much more efficiently than one stick of the same memory.
  4. Scottyk9 macrumors 6502a

    Jun 18, 2004
    Powermac G5 require pairs - you can't put in one single stick.
    Or are you referring to the G5 iMac?

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