Faulty GPU heat sensor or something else?

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Jiri__Law

Commendable
Apr 22, 2016
4
0
1,510
So, today my GPU started crashing after yesterday being fine. I have Gigabyte GTX 670 3x Windforce, so the fans can get quite noisy under heavy load. Usually the driver crash and eventual PC crash would follow by playing some game for 30 secs or so, then GPU borking out (ie black artifacts, FPS going down and then screen freeze followed by reboot, so typical GPU overheating syndrome). But at first I though it were GPU drivers. Clean reinstall, nothing. Then after a while, I realized my GPU is quite quiet before the crash happens. So I downloaded and installed MSI Afterburner, that allows manual control over the fans and also automatic to check if the fans work and they do, and since installing it, the fans spin again and cool efficiently and I am able to play heavy games normally again and the temps rise to expected temps and fall again after no load, so the heat monitoring works. But once I turn off afterburner, the GPU is not cooled again.

So is that faulty GPU sensor or motherboard or something else?
 
Solution
coozie7
Not the solution you're hoping for I know, but maybe it'll just be easier to plot a custom fan curve and set Afterburner to start with Windows.
If you've already set a custom fan curve which works it shows the sensors and fans are all working correctly, so either the driver install didn't take, here's a BIOS issue with the card or something has died on the card PCB, I doubt a sub standard PSU would cause this, it's far more likely to cause random crashes/stops/shutdowns than just effecting the GPU fans.
Pop the card out and closely examine the PCB looking for; Discoloured patches, burn marks, bulged or popped capacitors, scratches on the PCB rear (top when installed) or thermal paste residue around the GPU die itself.
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J

Jiri__Law

Commendable
Apr 22, 2016
4
0
1,510

Under full load, 65 Celsius top at full load (when cooling works), idle 28-32. But as I said, if I do not have Afterburner on, the fans do not spool up and I get over 85+ Celsius (what I was able to glimpse before shutdown) and then whole PC shuts down, because yeah, the GPU is frying itself.
And my full spec is:
600W Energy knight PSU
i7 3770
8GB DDR3 ram kingston
1TB sata HDD/120GB ssd

That's it.
 
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S

Sergeant_Sneaky

Admirable
Mar 25, 2015
3,193
0
7,960

85C isn't really a bad temp, the GPU can run at up to around 100c (I wouldn't recommend it) before shutting down, what are your CPU temps? I have NEVER heard of that PSU brand, which is why I believe your PSU may be causing the shut downs.
 
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coozie7

coozie7

Champion
Jun 2, 2007
10,015
10
59,215
Not the solution you're hoping for I know, but maybe it'll just be easier to plot a custom fan curve and set Afterburner to start with Windows.
If you've already set a custom fan curve which works it shows the sensors and fans are all working correctly, so either the driver install didn't take, here's a BIOS issue with the card or something has died on the card PCB, I doubt a sub standard PSU would cause this, it's far more likely to cause random crashes/stops/shutdowns than just effecting the GPU fans.
Pop the card out and closely examine the PCB looking for; Discoloured patches, burn marks, bulged or popped capacitors, scratches on the PCB rear (top when installed) or thermal paste residue around the GPU die itself.
 
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