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    Win7 x64 bootcamp - Nvidia 650M with 304.48 GPU-Z

    Discussion in 'Apple and Mac OS X' started by ekovalsky, Jun 20, 2012.

  1. ekovalsky

    ekovalsky Notebook Consultant

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    I was suprised to see the 650M clocked at 900MHz. While good for performance, not so good for battery life particularly since I cannot get it to step down, PowerMizer seems to do nothing even when set manually via the registry.

    I'm going to try the Apple bootcamp drivers from 6/15 that were 296.xx to see if power saving features can be enabled. That is really needed when running Windows since (as expected) I can find no way to enable/switch to the Intel HD4000 integrated graphics.

    Battery life surfing the web is around 4 hours with the 650M at full throttle, so it could increase significantly if I can get it to power down on battery.

    [​IMG]
     
    ekovalsky, Jun 20, 2012
    #1
  2. coolguy

    coolguy Notebook Prophet

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    Open the "sensors" tab. Your GPU should clock down by default.
     
    coolguy, Jun 20, 2012
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  3. ekovalsky

    ekovalsky Notebook Consultant

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    You are right, it does show downclock to 450MHz in the sensor tab. Thanks.

    Would be nice to cut it down further, will report back if I find a way to do that.
     
    ekovalsky, Jun 20, 2012
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  4. Nick

    Nick Professor Carnista

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    I would think the 2D clocks would be something like 100Mhz-200MHz.
     
    Nick, Jun 20, 2012
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  5. ekovalsky

    ekovalsky Notebook Consultant

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    Agree 100%. I tried turning using "Windows Classic" theme (i.e. turning off Aero) and there was no further drop... and it didn't make a difference, seems the GPU BIOS only provides for a drop to 405MHz in low power mode.

    I have edited desktop Nvidia card BIOS for power and voltage requirements in overclocking attempts. Is there any way to modify the BIOS for a notebook GPU like the 650M ?
     
    ekovalsky, Jun 20, 2012
    #5
  6. Speedy Gonzalez

    Speedy Gonzalez Xtreme Notebook Speeder!

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    I won't mess with the 650m vbios even if you can because if you kill the card good bye mobo

    it could also be a limitation of the nvidia card running such high resolution try to change the res and see if the clocks drop
     
    Speedy Gonzalez, Jun 20, 2012
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  7. coolguy

    coolguy Notebook Prophet

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    Are you using a modded INF?
     
    coolguy, Jun 20, 2012
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  8. saturnotaku

    saturnotaku Notebook Nobel Laureate

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    Quasi-unrelated question - when installing the Boot Camp drivers on these machines, does the system use the chipset drivers in AHCI mode? You can check this in device manager. I'm curious to see if Apple has ultimately addressed this, as all previous models would install in IDE mode.
     
    saturnotaku, Jun 20, 2012
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  9. coolguy

    coolguy Notebook Prophet

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    coolguy, Jun 20, 2012
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  10. FuzzyMcDoodle

    FuzzyMcDoodle Notebook Guru

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    I wanted to Bootcamp Windows as well. I know they just released those 650M drivers, but I don't have a Mac OS disc that came with my MBP.

    What do you use? This? Boot Camp Software Update 3.3 for Windows
     
    FuzzyMcDoodle, Jun 21, 2012
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  11. saturnotaku

    saturnotaku Notebook Nobel Laureate

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    When you run the Boot Camp assistant from within Mac OS, it will prompt you to download the appropriate software to burn to a CD/DVD or copy to a flash drive. This is the only way to obtain the drivers.
     
    saturnotaku, Jun 21, 2012
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  12. FuzzyMcDoodle

    FuzzyMcDoodle Notebook Guru

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    Thanks man
     
    FuzzyMcDoodle, Jun 21, 2012
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