Is Mac Pro RAM backwards compatible?

Discussion in 'Mac Pro' started by syrinxfilms, Aug 19, 2010.

  1. syrinxfilms macrumors newbie

    syrinxfilms

    Joined:
    Aug 12, 2010
    Location:
    Southern Cali
    #1
    That is to say could I use 1066 MHz gen 4 ram in my Mac Pro 1,1 2.66 quad? I know it will clock down, but I want to buy a good chunk of Ram and future proof it a bit for an upgrade.

    Thanks.
     
  2. Spanky Deluxe macrumors 601

    Spanky Deluxe

    Joined:
    Mar 17, 2005
    Location:
    London, UK
    #2
    No it won't work. They use completely different types of RAM alas with the 2006 model using FB-DIMMs (fully buffered with the massive heatsinks).

    2006/7 Mac Pro: 667 MHz DDR2 ECC fully buffered DIMM
    2008 Mac Pro: 800 MHz DDR2 ECC fully buffered DIMM
    2009 Mac Pro: 1066 MHz DDR3 ECC DIMM
    2010 Mac Pro: 1066/1333MHz DDR3 ECC DIMM

    All 2010 Mac Pro RAM will work in 2009 Mac Pros but no previous models.
    No 2009 Mac Pro will work in previous models.
    Some 2008 Mac Pro can (I believe at least) work in 2006/7 Mac Pros although the 2008 Xserve RAM I once tried in my 2006 Mac Pro didn't work.
    2007 (Octo) Mac Pro RAM works in 2006 (Quad) Mac Pro machines and vice versa.
     
  3. syrinxfilms thread starter macrumors newbie

    syrinxfilms

    Joined:
    Aug 12, 2010
    Location:
    Southern Cali

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