GPU stops displaying video after several minutes under load

[ByrdWhyrm]

I have recently began having problems with my graphics card. When I try to play a game it will run flawlessly for a few minutes, but then my card will suddenly stop outputting video, and the fan will begin to run at a very high speed. This continues until i restart, either by hitting the restart button or doing a hard shutdown. When I am not gaming, the computer can run without issue indefinitely.
Here are my current specs:
Amd fx 8350, stock speeds
Corsair H60 cooler
Asus m5a97 mobo
Zotac GTX 1060
WD 500gb hard drive
G skill sniper ddr3 RAM 1333mhz
Ocz fatal1ty PSU, 750w I think?

Unfortunately, I've made several changes to my hardware in the past month, so I'm having difficulty narrowing down the possible problems. My card is a brand new zotac GTX 1060 (the single fan mini model). This card was sent as a replacement for a GTX 970 that I RMA'd last month. That card stopped outputting video a day after I upgraded my phenom II 965 to a fx 8350. However, it worked fine for a day, in which I played 4-5 hours of dishonored 2 without issue. The next day I tried to play again and it started displaying visual artifacts for a few moments before hard crashing. This happened a second time, and then my card stopped outputting any signal at all. I RMA'd the 970, and ZOTAC replaced it with a 1060. I put the 1060 in yesterday, and also replaced the stock thermal paste on my fx 8350 with some arctic silver stuff. Since then I've been having these issues with my gpu not outputting a signal after several minutes under load.
Here's what's I've done to troubleshoot so far:
I've wiped my drivers and tried several different driver releases, new and old.
I've tried different pci-e slots.
I've tried different cables from my PSU.
I've ran Furmark, and watched temperatures. They seem well under the card's max when the card stops outputting video.

I'm wondering if anyone else has had issues like these before, or has recommendations on how to solve them? My suspicion is that it's just another faulty card, but it could be the PSU going bad and supplying my card insufficient power, or theoretically something to do with my cpu. I'm at a loss as to what to check next. If it's just a bad card, RMAing it won't be a huge deal, but I hate to do so without ruling out the other possibilities.

 

[ByrdWhyrm]

Nevermind, I've solved it! To anybody having a similar problem, here's what worked for me. After a little more research, I found some other people who had this same problem due to slowly failing PSUs. My PSU is just shy of four years old, so I thought I'd try dropping a new one in and seeing if It made a difference, knowing that I could always return it if it still didn't work. Thankfully, the gamble paid off and my computer is working beautifully again. I've played 2 hours of Dishonored 2 and the entire Resident Evil 7 demo without any issue.

 

[Fixre]

my psu is brand new, but i still have the same problem.