I have a problem (I think) with my r9 290. Yesterday the PC shut down (auto-restarted) when I started a game on Steam. It was a modded KOTOR anyway so at first I put it down to that, it's a bit unstable anyway but doesn't usually shut down the PC.
I then tried Unigine Valley as a test and again the PC shut down as soon as the program started. I then tried prime 95 (blend) to check the processor and ram - it wasn't running overclocked anyway but I thought it was worth testing, and that was fine.
I then re-seated the GPU and that seemed to cure it yesterday - however today it is back to the same problem. Now it makes it a little further into Unigine valley before shutting down, about 30 seconds. And again, prime95 blend test is fine on both standard and over clocked CPU setting, which is leading me to think it's a GPU problem. When I first got this GPU I did try overclocking, pushed it too far and nearly bricked it - I took that as a warning and since then it has been running at out of the box factory overclock settings and has been fine.
My concern is that it might be something else, like an imminent PSU failure? The r9 290 is very power hungry. I don't want to get a new GPU to find the PSU then goes and takes the new GPU with it.
Anyone got any ideas...? In the meantime I'll try re-seating the RAM but I don't think it's that...
Asus R9 290 Direct CUII
i5 2500k (runs at either stock or 4.4ghz OC)
16gb G.skill trident
OCZ Stealth Xstream 600w psu
Windows 10 (anniversary update)
Thanks in advance!