56GB of RAM possible in 2006/2007 Mac Pro (1,1/2,1)?

Discussion in 'Mac Pro' started by Mr. Zarniwoop, Oct 15, 2014.

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  1. Mr. Zarniwoop macrumors demi-god

    Mr. Zarniwoop

    Joined:
    Jun 9, 2005
    #1
    Apple only supported 4GB FB-DIMMs in these models, for a total of 32GB RAM.

    However, the chipset was always suspected to support 64GB with 8GB FB-DIMMs, but everyone who tried this only had RAM recognized up to 32GB RAM.

    But today there's an interesting post on netkas of someone who used mostly 8GB FB-DIMMs and left two 4GB FB-DIMMs in the last two spots of the second riser.

    The apparent result? 56GB RAM in a MacPro2,1

    Very interesting if it really works properly.
     
  2. frostart macrumors newbie

    Joined:
    Oct 9, 2014
    #2
    This my message on netcas.org. I established this memory three years ago. I established 56 Gb only because any more there was no such memory.:) It was necessary to put two modules on 4 Gb for bank filling. I tested memory in TechTools 7 - everything normally. Sorry for my English.:)
     
  3. FireArse macrumors 6502a

    Joined:
    Oct 29, 2004
    #3
    This is very interesting - sadly my RAM supplier of choice (Crucial) no longer supply the part. Where are you recommending we buy RAM in the UK?
     
  4. profinite macrumors member

    Joined:
    May 1, 2009
    #4
    2006 Mac Pro (MacPro1,1)
    Flushed to 2,1 firmware
    Two Xeon X5355’s [Purchased February 25, 2014 for $45]
    Macosxbootloader v3.1
    64GB RAM (8 x 8GB) [Purchased November 18, 2015 for $199]
    [​IMG]
    [​IMG]
     
  5. nigelbb macrumors 6502a

    Joined:
    Dec 22, 2012
    #5
    If you want 667MHz FB-DIMMs there are loads of cheap used parts on eBay pulled from Dell & HP servers. I have upgraded all three Mac Pro 3,1s in my household to 32GB & these parts will work in a 1,1 just fine. This is 32GB (8x4GB) from the US but they will ship to UK for about $50 all in (around £35) http://www.ebay.co.uk/itm/32GB-8x4G...973065?hash=item1ea3f83ac9:g:NikAAOSwcdBWTQGM
     
  6. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
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