2010 Mac Pro Dual Processor upgrade

Discussion in 'Mac Pro' started by Andy2k, Jun 21, 2016.

  1. Andy2k macrumors member

    Joined:
    Jul 18, 2015
    #1
    I have a 2010 Mac Pro 2.66x2 Xeons. I want to upgrade the CPU's in them. I was looking at the W3680 or X5680? The only real difference I've seen was the X series can run at about 10 C higher Mac temp, oh and the fact that a pair of X5680's are twice the price of the W3680. Would I notice any differences between the two (other than a potentially heavier wallet, that I would be 100% grateful for)? Anyone with two W3680's how do they run? Any issues. Thanks as always for any and/or all feedback.
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    You miss the most important difference, QPI Link. The W36xx only has one QPI Link, which CANNOT be use on the dual processor system.
     
  3. flowrider macrumors 601

    flowrider

    Joined:
    Nov 23, 2012
    #3
    Quite true. The W3680 will not operate on a dual CPU machine. I posted the below some time ago:

    Lou
     
  4. Andy2k thread starter macrumors member

    Joined:
    Jul 18, 2015
    #4
    Okay, I did miss that part. My apologies, well I guess that settles which processors to buy. Glad I measured twice and cut once on this one. Thanks for your help!
    --- Post Merged, Jun 21, 2016 ---
    Thanks, I was cruising through the forum and missed this tidbit. Thanks for your help.
     
  5. pdafan macrumors member

    Joined:
    Aug 2, 2011
  6. Andy2k thread starter macrumors member

    Joined:
    Jul 18, 2015
    #6
    One more question:

    A pair of X5690 are around $500 used. 3.46 Ghz

    A pair of X5680 is just shy of $300 used. 3.33 Ghz

    Is a .13 Ghz jump in speed worth the extra money? Would you really even notice an improvement outside of benchmark testing? I do quite a bit of video transcoding.
     
  7. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #7
    I doubt if anyone can tell the difference without benchmark software or stopwatch etc.
     
  8. nigelbb macrumors 6502a

    Joined:
    Dec 22, 2012
    #8
    The 3.46 GHz is 2.5-3.5% faster. Single threaded tasks pretty much scale with clock speed. Multithreaded not quite scale with clock speed increase. So if your rendering out a video took 60 minutes on the 3.46 it would take a little under 61.5 minutes on the 3.33.
     

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