"Nvidia Kernel Mode has stopped working and repaired itself" does have a lot of priors but to me the parts look old. A stopped fan or overheated part (many do not have temp sensors) does result in that error.
I’ve had my computer for about a year now (built myself) and the first 6 months it worked just fine, then i started to get a “Nvidia Kernel Mode has stopped working and repaired itself” upon startup, and then whenever i launched a game (cs:go, Dota 2, etc). It just crashed. This was among other weird things such as settings not being saved when i restart the computer, or the GPU fan not spinning. Thinking it was a hardware problem i tested the GPU in another computer and it worked perfectly fine, then about a week ago, thinking it was an OS problem, I converted from Windows 8.1 to Linux Mint. It worked fine up until today. I no longer get a startup error, but the glitch is very similar to the one on windows, where whenever I launch game it will run for a few moments, then the screen will go blank and freeze, then the computer will reboot, and the cycle continues. Any help is greatly appreciated
Specs:
GTX 950 2gb
AMD 8320E Black edition
1Tb Seagate WD Blue Hard Drive
GIGABYTE GA-78LMT-USB3 Mobo
8gb DDR3 Ram

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