Newb memory question.

Discussion in 'Mac Pro' started by alanlindsay, Apr 15, 2008.

  1. alanlindsay macrumors member

    Mar 4, 2008
    So the MP comes with 2GB (2x1GB). If I buy 8GB ( 4x2GB ) is it best to leave out the 2GB it comes with or include it for a total of 10GB. I ask because I read on the Apple website that the memory is most effectively utilized when operating with 4 or 8 identical modules. Cheers.
  2. MacAtaq macrumors newbie

    Jan 17, 2008
    Theres no harm in leaving your original 2GB.
    If you get 4 x 2GB (here are your 4 identical modules) thats 8GB +2GB Original.
    If you're looking to upgrade your RAM I recommened - last time I checked their 8GB kits were running at $346.
  3. alanlindsay thread starter macrumors member

    Mar 4, 2008
  4. CanadaRAM macrumors G5


    Oct 11, 2004
    On the Left Coast - Victoria BC Canada
    We have Guide on Understanding Intel Mac RAM under the Guides tab, Hardware.

    The answer to the question depends on how you are using the RAM.

    RAM in the 3 and 4 sockets on each riser is slower than RAM in the 1 and 2 sockets (higher latency, because the request goes to the 1 or 2 socket first, and is forwarded by the chip on that FB-DIMM to the 3 r 4 socket)

    So if you gain more application performance by having the extra 2 GB total RAM, than you lose through additional latency, then you would have faster performance.

    In the USA, check out Data Memory Systems - $356 for 8 GB, excellent reputation and service.

    I don't know MemoryAmerica -- their domain has been in existence for 1 year. The WHOIS domain information is stealthed, which I never like.

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