Crashing While In games

[Prominia]

Recently I have been having hard crashing while in games. The screen will freeze and i am unable to do anything but physically restart the computer, i cannot access the desktop or task manager. I have overlcocked my cpu around a month ago and the crashing has just begun the past couple of days. I have two Gigabyte GeForce GTX 980 4GB WINDFORCE gpus. One card runs around 80º the other card runs around 65º. My PSU is a SeaSonic 850w, which is strong enough. I did fool around with MSI Afterburner, but after seeing only minimal gains i set it back to default.
Is it possible one card is bad, or would it possibly be something else?

 

[refillable]

Yes it is possible. I would not expect it to fail just for a month, but I would say it's possible however. I would like to ask whether you did anything to the GPU/Software/Drivers before the crash. If yes, try to revert back. If not I can guess one of them should be failing. Can you test the card one by one?

 

[Prominia]

Yes it is possible. I would not expect it to fail just for a month, but I would say it's possible however. I would like to ask whether you did anything to the GPU/Software/Drivers before the crash. If yes, try to revert back. If not I can guess one of them should be failing. Can you test the card one by one?

The only thing i did was overclock the gpus slightly then reverted them after seeing minimal gains and higher temps. I do not know the best way to test them because the crashing seems to be completely random in games. I can go hours without crashing and then another time go 5 minutes and crash. I did notice that in less graphically intense games it doesn't crash as often, although it has crashed in them as well. Would the best way to do a factory reset would just be to uninstall the drivers and reinstalling them?
Should i physically take out one card and try running it?
Also a side note: When building my PC i had trouble getting my PC to post, the problem being that one gpu did not want to work in the top slot, but seemed to work perfectly in the 2nd slot.

 

[refillable]

Yes, I think you should try the cards one by one. According to my experience crashes are completely random, and it should be easy to test if you have a testing system. AFAIK properly matched GPUs should run fine in any PCI-E x16 slots. I didn't remember hearing such issue. I believe the best factory reset is re-installing windows but just for the GPU, a clean install of drivers should be ample.

 

[Prominia]

Yea i agree, that it was weird that i couldnt post in another slot, but thats what was happening. SHould i use a benchmark program to test like heaven benchmark or something? also for how long?

 

[11sphere92]

Yes you should try with Unigine, but 1 by 1 card, after that compare your scores with the review scores usually do.

With those you can know, which one of the graphic card that is broken and causes freeze and can't do anything.

 

[Prominia]

Yes you should try with Unigine, but 1 by 1 card, after that compare your scores with the review scores usually do.

With those you can know, which one of the graphic card that is broken and causes freeze and can't do anything.

How long should i test for? 30 min? 3 hours?
Also I am starting to get whea_uncorrectable_error, which i assume means not enough voltage, so i was thinking that the problem might not be the gpu, but enough voltage, but it is not always showing the bsod.