Upgrading dual CPUs - is stepping important?

Discussion in 'Mac Pro' started by Running with Scissors, Apr 20, 2016.

  1. Running with Scissors macrumors newbie

    Running with Scissors

    Apr 18, 2016
    I'm planning on upgrading a 2010 dual quad-core Mac Pro to dual six-core CPUs (x5675). I remember back in the old days of dual CPUs (think Pentium), you had to have the same stepping in both CPUs in order for the machine to be able to boot. Is this still the case? Have their even been multiple steppings of this CPU? I can find CPUs in matched pairs, but it's sometimes cheaper to buy them individually.

    --- Post Merged, Apr 20, 2016 ---
    I'm answering my own question (should have done this first, I guess): According to their web page, Intel has only released a single stepping (B1) for this CPU, so I should be OK.
  2. scott.n macrumors 6502

    Dec 17, 2010
    Stepping is important, but I believe that all 3500/5500/5600-series processors that could be used in a dual-processor 4,1 or 5,1 were only ever available in a single stepping.

    I suppose there might be some benefit in a pair of processors with the same provenance (amount of use, etc), but otherwise, no reason to pay more for a "matched pair".
  3. ActionableMango macrumors G3


    Sep 21, 2010
    I do remember someone mentioning he had problems with dual CPUs and different steppings. One was a low voltage stepping and the other normal. But as you and Scott have already mentioned, this is moot for x5675.

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