MBP 8600M GT Clock Frequencies / Overclocking

Discussion in 'MacBook Pro' started by whateverandever, Jun 8, 2007.

  1. whateverandever macrumors 6502a

    Nov 8, 2006
    I finally got everything setup in Windows... and I'm getting a reading in nTune of 375MHz core clock and 502MHz memory clock.

    Anyone else have anything different? I guess it's a bit below "stock" levels (475/700), but it's still a big boost.

    Anyone doing much overclocking yet?
  2. aliquis- macrumors 6502a

    May 20, 2007
  3. whateverandever thread starter macrumors 6502a

    Nov 8, 2006
    Well, the 8x00 series mobile chips dynamically underclock to save battery life, so changing the max clock speed shouldn't kill battery life unless you're using it.

    No idea if you can overclock in OS X or not, though :(
  4. Anorak macrumors regular


    May 29, 2007
  5. whateverandever thread starter macrumors 6502a

    Nov 8, 2006
    Hmmmm, strange. They must have been comparing the X1600 on a 17" MBP to the new 8600. If I remember correctly, our 15"-ers didn't dynamically change the clock speeds on the X1600.
  6. Episteme macrumors regular

    Jan 25, 2007
    The Core Duo 15" model didn't, at least at release, but this is something that should be able to be fixed in drivers, so I don't know if it was ever added. I don't recall reading of it being added though.

    The Core 2 Duo 15" models did have it at release - see here:
  7. m3the01 macrumors member

    Jun 18, 2007
    As for the overclocking.

    There is a good post here,

    However under stock new 163.67 driver and 1440-900 res im getting 3950marks on 3dmark06. Which is better than any of the posts even with them using lower resolution. All the > 160 nvidia drivers have locked the core and memory settings, u will have to go and use the boot camp version if u want to overclock.

    Under the stock apple bootcamp driver i was at 3700marks on a fresh install of xp pro.

    I also noticed something kinda kool with the new driver while watching nvidia monitor that comes bundled with ntune.

    Background, under nvidia control panel and performance settings i see an unchangeable core bus of 375 and mem bus 502mhz. However in the earlier mentioned nvidia monitor program the values go much higher than these.

    They actually max out at 466mhz core and 632mhz memory under intensive GPU'ing. Which is pretty good for a mobile GPU.

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