How to identify engineering sample CPUs

Discussion in 'Mac Pro' started by flehman, Mar 25, 2015.

  1. flehman macrumors 6502


    Feb 21, 2015
    I have read in various threads to watch out for engineering samples of CPUs because they may draw more power, generate more heat, and/or perform less reliably. Can anyone advise as to markings or abbreviations that I should look for on a CPU that would identify it as an engineering sample so that I can avoid them?

    To be specific, I am looking at a X5690 or W3690 for a single-processor Mac Pro 5,1.

    Also, is there any qualitative difference between the X and the W processor other than support for dual CPU functionality? Nearly everything I have read so far indicates they are equal, but I ran across one benchmark someplace that suggested the W3690 might have been a little faster and that gave me pause.
  2. ActionableMango macrumors G3


    Sep 21, 2010
  3. Pressure macrumors 68040


    May 30, 2006
    For starters it says so on the chip markings.

    That would be a very strong indicator ;)
  4. flehman thread starter macrumors 6502


    Feb 21, 2015
    Well OK then - I had no idea that the engineering sample markings were THAT obvious. I guess I don't have much to worry about. Thank you!

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