CPU-Z - Core Speed?

Discussion in 'Mac Pro' started by Infrared, Jun 8, 2008.

  1. Infrared macrumors 68000

    Infrared

    Joined:
    Mar 28, 2007
    #1
    CPU-Z running on a 2008 mac pro:

    cpuz2.jpg

    I don't think I understand what the core speed is.

    Why isn't it 2.8GHz?

    Is this a speedstep situation?

    Thanks.
     
  2. Quu macrumors 68020

    Quu

    Joined:
    Apr 2, 2007
    #2
    That is most definitely Speedstep at work. Your FSB is correct.

    Speedstep on Intel platforms reduces the Multiplier and keeps the FSB speed constant so if your FSB is correct (which it is) then your CPUs lower speed is due to the Multiplier being reduced by speedstep (Normal behaviour)
     
  3. Infrared thread starter macrumors 68000

    Infrared

    Joined:
    Mar 28, 2007
    #3
    Ah, thanks very much. I have a bit of reading to do, it seems.

    For a second I was worried Apple might have underclocked it :)
     
  4. inca macrumors newbie

    Joined:
    Oct 11, 2006
    #4
    Just for fun, could you post the mainboard and other tabs from CPU-Z, please?
     
  5. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #5
    Intel processors clock down to a x6 multiplier when idle (400 MHz x 6 = 2,400 MHz) you get full speed when in use (400 MHz x 9 = 2,800 MHz).
     

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