SpeedStep sticking?

Discussion in 'MacBook Pro' started by J the Ninja, Nov 11, 2009.

  1. J the Ninja macrumors 68000

    Jul 14, 2008
    Anyone else noticed this, in SL in particular? The machine simply does not throttle back. You can confirm this with the power/sensors meter in iStat Menus; the CPU never fully idles or undervolts like it is supposed to. This doesn't happen all the time, it seems to be random. Nothing gets rid of it, until you reboot. Then things are back to normal for awhile, often days, or longer.

    I attached a screenshot as evidence. Activity Monitor to show the machine is idle, and netkas' CPU-X to show the clock speeds.

  2. Eidorian macrumors Penryn


    Mar 23, 2005
    I don't think CPU-X can handle dynamic clock speed reporting. It tends to only report the full clock speed that the processor is capable of. At least that's how it was the last time I used it.
  3. J the Ninja thread starter macrumors 68000

    Jul 14, 2008
    Maybe. But like I said, iStat Menu's voltage display DOES update in real time (every few seconds), and it shows the vcore locking at max as well.

Share This Page