2012 rMBP Extreme GPU Throttling?

Discussion in 'MacBook Pro' started by bioyuki, Aug 22, 2013.

  1. bioyuki, Aug 22, 2013
    Last edited: Aug 22, 2013

    bioyuki macrumors member

    Joined:
    Jun 12, 2012
    #1
    I never gamed on my rMBP, but the recent Humble Bundle got me back into the saddle.

    2012 rMBP, 2.3ghz base with the RAM upgrade. I just installed Win8 via Bootcamp and the latest Nvidia drivers. Battlefield 3 is unplayable (< 15fps) even on the lowest settings at low resolutions (1680x1050 or lower).

    After installing GPU-Z I've noticed a few things:

    When the discrete GPU is in use (e.g. external monitor), but the computer is at idle, its GPU temperature is 70-75°C. Fans are always spinning for the most part. When I start the game, the GPU immediately rises to 90°C+ and starts getting throttled. As a result, the GPU is usually running at only 270Mhz with spikes to 685Mhz. It's nowhere close to running at its expected 900Mhz speed. I'm already running Lubbo's and the fans are maxed out and I've disabled turbo boost on my CPU to try and keep things cool. I've also reset the SMC and PRAM/NVRAM.

    This can't be normal can it? Unfortunately my machine is already out of warranty so taking it to Apple isn't an option yet.
     
  2. fatlardo macrumors 6502

    fatlardo

    Joined:
    Mar 15, 2011
    #2
    Wow you already did what I would have recommended. Hoping someone else may jump in and advise. For comparison, I have boot camp W7 and pretty much get the same temps. I dont recall getting throttled though, just very hot according to msi afterburner and hw monitor.
     
  3. swerve147 macrumors 6502a

    swerve147

    Joined:
    Jan 12, 2013
    #3
    Not normal. You might as well repaste since you're out of warranty.
     
  4. jav6454 macrumors P6

    jav6454

    Joined:
    Nov 14, 2007
    Location:
    1 Geostationary Tower Plaza
    #4
    That type of GPU operation isn't normal. You need to get your computer looked at.
     
  5. bioyuki thread starter macrumors member

    Joined:
    Jun 12, 2012
    #5
    Sigh, thanks guys. You can see the issues here.

    Yellow = Temp
    Blue = GPU Clock
    Red = GPU Memory Clock

    [​IMG]

    Once the GPU hits 90°C+, you can see the throttle start to happen and the GPU clock bounces between 270Mhz and 724Mhz. You can see the memory clock being similarly throttled.

    So what's the issue here? I opened up the machine and everything looks fine in terms of the fans, heatsink, etc.
     
  6. bioyuki thread starter macrumors member

    Joined:
    Jun 12, 2012
    #6
    Update: Just came back from the story and after talking with a 'Genius', he said this type of throttling is normal and to be expected.

    WTF?

    He offered to change the logic board but that's a $500+ repair.
     
  7. sofianito macrumors 65816

    sofianito

    Joined:
    Jan 14, 2011
    Location:
    Spain
    #7
    Sell it on eBay and next time never ever get a rMBP without AC unless you live in Europe ;)
     
  8. jav6454 macrumors P6

    jav6454

    Joined:
    Nov 14, 2007
    Location:
    1 Geostationary Tower Plaza
    #8
    $500+repair?! Dear God...
     

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