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bozz2006

macrumors 68030
Original poster
Aug 24, 2007
2,530
0
Minnesota
Has anyone else experienced this? I've attached a pic. It's the "GPU Diode" temp that's whacky.
 

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Hmmm... Should this worry me? If it's basically inconsequential I'd rather not have to get it repaired. I wonder if this diode is tucked away or if perhaps I broke it or disconnected it when I had the computer open.
 
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Hmmm... Should this worry me? If it's basically inconsequential I'd rather not have to get it repaired. I wonder if this diode is tucked away or if perhaps I broke it or disconnected it when I had the computer open.

They are a cheap part, under $15 I think. Apart from the machine not knowing if it is overheating or not, there isn't much impact. You can change it if you want, I know I would especially if I still was in the warranty period.
 
I just did a little experiment. Interestingly enough it only shows a negative temp when I'm on the integrated GPU. If I use gfxcardstatus to switch to the discrete gpu, it shows up as a positive value; ~113 degrees F in light use.

Perhaps it only reports on the discrete gpu, and when the integrated GPU is active, it reports that negative value.
 
I just did a little experiment. Interestingly enough it only shows a negative temp when I'm on the integrated GPU. If I use gfxcardstatus to switch to the discrete gpu, it shows up as a positive value; ~113 degrees F in light use.

Perhaps it only reports on the discrete gpu, and when the integrated GPU is active, it reports that negative value.

Exactly correct, Bozz. This happens within istat where once the dGPU is forced it will display a positive number (actual), once it pushes to integrated again istat doesn't recognize the change and displays an arbitrary number until your machine is re-started.

No shinnanigans save for istat being selective!
 
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