GPU Diode -127

Discussion in 'MacBook Pro' started by theoski, Nov 11, 2008.

  1. theoski macrumors member

    Joined:
    Oct 20, 2008
    #1
    All the sudden GPU Diode is showing -127 degrees. GPU Diode sensor kaput? MBP (Late 2008) 2.4 GHZ. I am on my second one.
     
  2. Eidorian macrumors Penryn

    Eidorian

    Joined:
    Mar 23, 2005
    Location:
    Indianapolis
    #2
    What application are you using for temperature readings?
     
  3. LoneWolf121188 macrumors 6502a

    Joined:
    Jun 7, 2007
    Location:
    Longmont, CO
    #3
    Probably a driver error. Did you recently update your monitoring app?
     
  4. mknawabi macrumors 6502

    mknawabi

    Joined:
    Feb 5, 2006
    Location:
    Irvine, CA
    #4
    you mean Fahrenheit? 52C is an okay temperature
     
  5. Big-TDI-Guy macrumors 68030

    Big-TDI-Guy

    Joined:
    Jan 11, 2007
    #5
    Mai GPU is @ 162F. Been around that temp for about 2 years now.
     
  6. LoneWolf121188 macrumors 6502a

    Joined:
    Jun 7, 2007
    Location:
    Longmont, CO
    #6
    Negative 127 degrees? Probably not reasonable, unless you're using LN2. ;)
     
  7. mknawabi macrumors 6502

    mknawabi

    Joined:
    Feb 5, 2006
    Location:
    Irvine, CA
  8. The Flashing Fi macrumors 6502a

    Joined:
    Sep 23, 2007
    #8
    It's a lot more common than most people realize. All it takes is for a bad calibration. It's not going to affect anything or hurt anything, and it could be that the software reading is wrong.
     
  9. Mercellus macrumors regular

    Joined:
    Nov 4, 2008
    #9
    If it is a piece of software such as iStat, I would imagine that the vendor in this case, iSlayer.com) would need to update the software to properly detect the new chipset that these models utilize (NVIDIA instead of Intel).
     
  10. m1stake macrumors 68000

    Joined:
    Jan 17, 2008
    Location:
    Philly
    #10
    While that's obviously more inaccurate than usual, these things are pretty inaccurate to begin with. :eek:
     
  11. theoski thread starter macrumors member

    Joined:
    Oct 20, 2008
    #11
    I am using IStat and it is actually in C so in F would be negative 197.

    Dead frozen.

    But my issue is that it just started yesterday and in coincided with the buzzing noise from the left fan. The noise stopped but the temperature stayed.
     
  12. Mercellus macrumors regular

    Joined:
    Nov 4, 2008
    #12
    I know this is going to sound obvious, but have you tried shutting the computer down completely and turning it back on?
     
  13. eldy macrumors 6502

    Joined:
    Jan 30, 2009
    Location:
    The City
    #13
    I have the same problem.

    The GPU diode temperature will usually show the errant value when the computer using the 9400M GPU goes to sleep then wakes back up.

    The issue is not replicable when using the 9600M graphics card.

    Re-installing iStat's temperature probe module from Intel brings the temperature readings back on the 9400M GPU.
     
  14. J the Ninja macrumors 68000

    Joined:
    Jul 14, 2008
    #14
    I've found just switching cards will do the trick. Temps around -125C are very common when a program is trying to read a sensor that isn't actually there (or in this case is turned off). Making the correct value appear should fix it.
     

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