Unfortunately I now have an even bigger problem. Whereas the old card would crash under mid to high load, and then the screen would come back after a few seconds (although some games would crash completely in the process), now the computer randomly shuts down completely, even when it's not under any load.
I ran the setup for a couple days before the crashing started. The first few times it happened immediately after trying to use Wake on LAN. Basically if the computer was asleep and I sent the Wake on LAN signal, it would either wake the system and be fine, or it wouldn't wake the system at all, and after manually waking the system it would randomly shut down. I figured I could avoid this by just not using Wake on LAN as it wasn't that important to have that working, and for a couple days, it worked fine with no issues.
Then a day or two ago the computer started shutting down in the middle of me playing games. Every time I would play GTA 5 at some point or another, my whole computer would just shut down mid-game. That said, it was at least only crashing while playing a demanding game like GTA 5. Now it has started crashing while playing games that aren't as demanding such as CS:GO, which has made competitive matchmaking hell for me.
When the first GPU started crashing, I got a few people suggesting that it was my PSU, so I went ahead and bought an overkill PSU for my rig (620w -> 850w), but I quickly found out that it didn't fix the issue. But now it seems as though the new PSU is failing, since when it crashes, my CPU and GPU temps are fine.
I was able to play CS:GO for about 15min before it finally shut down completely the first time, and upon booting up and re-joining the game it instantly crashed again (within a second or two).
So you guys got any ideas before I RMA the PSU? I should also note that the MAX power my PSU ever pulls from the wall is only 450w.
EDIT: should also note that the case of the PSU is about as warm as the heatsink on my GPU after it crashes, not sure if that's normal or not.
EDIT2: After the computer crashes, it attempts to restart, and will fail to do so anywhere from once to several times before booting correctly.
Edited by Oleh - 3/26/16 at 4:51pm