nMP can it take non -ecc ram

Discussion in 'Mac Pro' started by mrsavage1, Jan 2, 2014.

  1. mrsavage1, Jan 2, 2014
    Last edited: Jan 2, 2014

    mrsavage1 macrumors regular

    Feb 1, 2010
    Is it possible to replace all the ram in the nmp with non ecc ram? And can the non ecc mix with ecc ram?
  2. jav6454 macrumors P6


    Nov 14, 2007
    1 Geostationary Tower Plaza
    Can you mix ECC and non-ECC, yes, but its highly discouraged. Can you have non-ECC entirely? Yes, it's like putting 87 octane into an engine that takes 93 octane. It'll run, but not to full performance (in this case the error correcting code feature won't work)
  3. 666sheep macrumors 68040


    Dec 7, 2009
    Actually non-ECC it's about 2% faster at the same clock. Here is a nice article that covers pros and cons.
  4. [G5]Hydra macrumors regular

    Jul 2, 2004
    Pretty much. Nothing is ever free. You want error correction you pay a little in ultimate performance. A couple % won't be possible to tell the difference in day to day use so its probably not worth worrying about. If you are doing weeks long calculations that can all be wasted if a bit is flipped you can bet it's worth way more than the little performance hit.
  5. jav6454 macrumors P6


    Nov 14, 2007
    1 Geostationary Tower Plaza
    My performance post is not about speed. It's about the feature itself that will not work.
  6. calaverasgrande macrumors 65816


    Oct 18, 2010
    Brooklyn, New York.
    I expect 1866 ram prices will drop after the initial "goldrush".
    It is always like this when the next higher speed tier solidifies.
    I recall similar issues when DDR400 replaced DDR333 on mainstream PCs. Couldnt even find DDR400 sticks in any size but 512mb for a bit.
    Likewise there were some shortages when DR1066 was coming up as well.
  7. skywiseca macrumors newbie

    Oct 3, 2012
    Will the nMP actually take non-ecc though?
    Alot of ECC machines don't like nonECC RAM.
    Anyone tried it yet?

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