64GB in Quad MP ?

Discussion in 'Mac Pro' started by Bithero, Feb 14, 2011.

  1. Bithero macrumors newbie

    Joined:
    Nov 8, 2010
    #1
    I was wondering if somebody already tested 16GB DIMMs in a MP.
    Hynix and Samsung are offering 1066 MHz DIMMs at already reasonable cost.
    Some dealer is offering them on eBay in Germany.
    Article number is: 350439604472

    I was checking the Intel RAM test page and it says that these DIMMs are tested here: http://www.intel.com/technology/memory/ddr/valid/ddr3_UDIMM_RDIMM_results.htm#1DPC_1

    If this is true a Quad MP could run with 64GB RAM and be quite future proof concerning the RAM configuration.
     
  2. Vylen macrumors 65816

    Joined:
    Jun 3, 2010
    Location:
    Sydney, Australia
    #2
    No one here has tested them afaik - probably out of fear of wasting money ;)

    But, it certainly has been brought up before - asking pretty much the same question as you. And well, no one in that thread tried it.

    Maybe you can offer yourself as a guinea pig :p
     
  3. Umbongo macrumors 601

    Umbongo

    Joined:
    Sep 14, 2006
    Location:
    England
    #3
    Four will run at 800MHz rather than 1066MHz as they are quad-ranked. The Mac Pros can address 64GB of memory.

    If you are curious and unsure about any component working in your Mac Pro you can return items under the distance selling laws in the EU if any comparability issues arise (within 7 days).
     
  4. philipma1957, Feb 14, 2011
    Last edited: Feb 14, 2011

    philipma1957 macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    Location:
    Howell, New Jersey
    #4
    here in the usa i found a seller at


    http://www.memoryamerica.com/m393b2k70bm1-cf8.html



    but it is 943 usd a stick your german ebay seller is about 1350 usd for 2 sticks

    http://cgi.ebay.de/ws/eBayISAPI.dll...ee-All-Categories&_fvi=1&_rdc=1#ht_3844wt_991




    here is a usa ebay seller with used pulls at 700 usd a stick but he will take offers

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270681290895#ht_2619wt_907


    even if he sold them to me at 3 for 1500 I can't buy something with a 1 week warranty/exchange and pay that much. I am thinking these sticks would work. 48gb ram in a quad would be nice for the right user. The price will drop in time.



    I found this ebay seller even lower 850 for a pair of 16gb sticks and he will take an offer.



    http://cgi.ebay.com/32GB-2x16GB-Sam...ultDomain_0&hash=item3f0718dfcd#ht_809wt_1141

    not sure if they work but it is tempting to offer him 600 for the pair.
     
  5. Bithero thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #5

    I was tempted to do a test ....:D
    Although I am perfectly happy with my Quad and 32GB (4x8).
    But I just checked this seller again and now he is actually offering
    even 1333 MHZ 16GB modules at a little higher price point but specific for
    the 2009/2010 Nehalem and Westmere MPs !!!
    You can check the link here: http://cgi.ebay.de/Samsung-48GB-M393B2K70BM1-CF8-Ram-Speicher-Apple-MacPro-/310296168867?pt=DE_Technik_Computerzubeh%C3%B6r_Arbeitsspeicher&hash=item483f17c9a3
    Of course I don´t know if this seller is as reliable as OWC, but since Intel is also confirming that these modules work, I have little doubt that the Quad MPs should work with 48GB or even 64GB. Which is certainly interesting news for many guys here that are buying the 8/12 core MPs purely for their 8 RAM slots.
     
  6. DeeEss macrumors 6502a

    Joined:
    Jan 17, 2011
    #6
    Damn it.

    I wish I had of known about this earlier as i just maxed out on 8GB sticks.

    64GB would be sweet.
     
  7. scottsjack macrumors 68000

    Joined:
    Aug 25, 2010
    Location:
    Arizona
    #7
    What about the power consumption of a single 16GB stick of RAM per slot?
     
  8. Bithero thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #8
    On the Samsung Semiconductor website they have a document where they advertise their "green DDR3 RAM". They claim a power reduction of 75% from ddr2 to their new ddr3 modules, that is 28 Watt for 48GB with ddr3 versus 102 Watt for 48GB with ddr2 RAM. Impressive if true.
     
  9. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #9
    Ouch!

    This post made me look up what quad ranking is. Never even knew about it. It makes me wary of cheap RAM that doesn't list it's ranking.
     
  10. Bithero thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #10
    The 16GB Samsung modules are 1333MHz dual rank if the specs in the eBay offer is correct.
     
  11. Umbongo, Feb 14, 2011
    Last edited: Feb 14, 2011

    Umbongo macrumors 601

    Umbongo

    Joined:
    Sep 14, 2006
    Location:
    England
    #11
    The part number used in the auction is for 1066MHz QR modules.

    32GB QR 1333MHz - M393B4G70AM0-CH9
    32GB QR 1066MHz - M393B4G70AM0-CF8
    16GB DR 1333MHz - M393B2G70AH0-CH9
    16GB DR 1066MHz - M393B2G70AH0-CF8
     
  12. highdefw macrumors 6502

    Joined:
    Apr 19, 2009
    #13
  13. DeeEss macrumors 6502a

    Joined:
    Jan 17, 2011
    #14
    32GB is necessary for my needs. Could do with more.
     
  14. mdgm macrumors 6502a

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    Nov 2, 2010
    #15
    Running multiple apps demanding lots of memory at once including VMs.
     
  15. philipma1957 macrumors 603

    philipma1957

    Joined:
    Apr 13, 2010
    Location:
    Howell, New Jersey
    #16
  16. mdgm macrumors 6502a

    Joined:
    Nov 2, 2010
    #17

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