2010 Mac Pro 1080 Ti GPU Fans Not Spinning

Discussion in 'Mac Pro' started by m00nb34rz, Dec 7, 2018.

  1. m00nb34rz macrumors newbie

    m00nb34rz

    Joined:
    Dec 7, 2018
    Location:
    Chicago, IL
    #1
    Hi All! First post, so I'm sorry if this has been answered before (it's an oddly specific question though)...

    Specs (listing just incase this has anything to do with my issue):
    - Mac Pro (Mid 2010) w/ (2x) 2.46 GHZ 6-Core Intel Xeon Processors
    - Running High Sierra
    - 32GB DDR3 ECC RAM
    - ASUS ROG GeForce GTX 1080 Ti (11GB)

    So I have correct power going to the 1080 Ti (2 mini 6 pin - 8 pin & SATA - 8 pin), yet the fans on the GPU itself don't spin at all (even during a stress test). They Do spin full speed quickly when the Mac is powered on, but ramp completely down and don't ramp up again. Also, I have iStats installed and I can see that the GPU is noticed by OS X, but there's no options for fan speed or GPU temperature. I'm worried that these fans not running might cause heating issues with the card.
    FYI, the fan dedicated to the PCI slots works perfectly, no issue with that.

    Bonus Question: Is there any OS X software available to change the LED's on this GPU?
     
  2. AidenShaw macrumors P6

    AidenShaw

    Joined:
    Feb 8, 2003
    Location:
    The Peninsula
    #2
    Many Nvidia-based cards don't spin the fans until the GPU temperature is above 60°. Check the GPU temperature during the stress test. If it's 50° and the fans don't spin, no problem. If it's 70° and they aren't spinning - big problem.
     
  3. m00nb34rz thread starter macrumors newbie

    m00nb34rz

    Joined:
    Dec 7, 2018
    Location:
    Chicago, IL
    #3
    Thanks for the reply! As I mentioned in the original post, I can't see any GPU temperature. I ran the Valley Benchmark for about 5 minutes (assuming that's long enough for it to heat up passed 60°) and still no fan activity.

    Also I'd like to note, I've had this graphics card for over a year (used it to mine for about 6 months) so I know there's likely no issue with the card itself as it's been functioning adequately before.
     
  4. h9826790 macrumors G5

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #4
    Your CPU is way too slow for 1080Ti. In 3D apps (e.g. Unigine Valley), unless the resolution is set to ridiculously high. The GPU utilisation rate may be much lower than you can expect.

    Anyway, if you want to warm up the card, try Furmark. If you can run Furmark for 5min and the card's fan still doesn't spin, then something should be wrong.

    N.B. In your case, even Furmark still CPU limiting, but if you run that at max possible resolution and no AA, should be stressful enough to really warm up the card.
    --- Post Merged, Dec 7, 2018 ---
    This is my 1080Ti Valley result in my cMP, that's already with a 3.46GHz W3690.
    Valley Extreme.jpg
    And this is the exact same card can do in my Hackintosh (8700k)
    Unigine Valley.png

    As you can see. The 1080Ti can only perform at about ~50% even with the Extreme HD preset. The power draw will be lowered as well, and the GPU will run cooler. With your 2.4GHz CPU, it will be even less stressful due to even less draw call will be made by the CPU.
     
  5. m00nb34rz, Dec 7, 2018
    Last edited: Dec 7, 2018

    m00nb34rz thread starter macrumors newbie

    m00nb34rz

    Joined:
    Dec 7, 2018
    Location:
    Chicago, IL
    #5
    I made a typo.. it's actually a 3.46 ghz
    --- Post Merged, Dec 7, 2018 ---
    ALL IS GOOD EVERYONE, THEY'RE WORKING! :D
    They're just not spinning constantly... just kind of short low bursts

    Here's my score:
     

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4 December 7, 2018