using generic fbdimms to upgrade

Discussion in 'Mac Pro' started by PerformancePcs, Sep 30, 2013.

  1. PerformancePcs macrumors newbie

    Aug 21, 2012
    Hi all,

    Im doing a major overhaul of one of our mac pro 1.1's and was wondering on memory. Upgrading to 32gb its max, and wondered if it was possible to use server 5300f ecc registered memory from a dell or hp server in there.

    Same timings snd fbdimm, just not apple and a hell of alot cheaper.... Any ideas or suggeztions?
  2. pastrychef macrumors 601


    Sep 15, 2006
    New York City, NY
    Many other have used generic RAM successfully.
  3. malana macrumors member

    Dec 10, 2009
    sure, go ahead. we maxed out our 1,1 and 3,1 with every brand, that came along. still expensive, though.
  4. xcodeSyn macrumors 6502a

    Nov 25, 2012
    FYI, the R-DIMM is not compatible with the FB-DIMM as can be seen here. What you need is Dual Rank FB-DIMM, not even the Quad Rank FB-DIMM would work.
  5. PerformancePcs thread starter macrumors newbie

    Aug 21, 2012
    Ok to sum up.

    As long as im using PC2-5300f FB-Dimm with heatsinks then im all good to go with this as? Anything other than this format will not work.

    Wont be expensive for me to carry out in this format as ive got a couple of Dell poweredge Servers that im pulling apart which carries this memory and has the capacity I need.

  6. ScottishCaptain macrumors 6502a

    Oct 4, 2008
    You might encounter issues when the RAM is heavily stressed, and/or your Mac Pro will run louder then normal.

    There is a reason why Apple included larger then normal heat-sinks on their FBDIMM RAM. That reason was to keep the system quiet and keep the memory adequately cool without excessive airflow over the FBDIMMs.

  7. Dark Dragoon macrumors 6502a

    Dark Dragoon

    Jul 28, 2006
    Should be fine as long as they have the large heatsinks and not just heat spreaders (flat metal plate type heatsink).

    Though even with the wrong type it should be ok most of the time, though expect the fans for cooling the RAM to run faster and for the occasional heat related hard shutdown if you stress the system.

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