So my GPU was running fine for about a year, or at least it seems. I am unsure exactly when performance dropped significantly. I benched and OC'ed it when I got it and it ran as expected, but I have been running it and my CPU without OC for most of the time (too many other problems going on). I was playing Division 2 at 1440p max settings in HDR, and only getting around 60fps (have a 144hz monitor). That seemed out of place, so I ran Superposition with 1080p extreme and only got a 4600 score. I believe my original scores were 8000+, and others with the same card have gotten 120fps averages in Division 2 with the same settings. Superposition shows 1600-1700mhz clocks while running.
Got a 2080 Ti Fe with a waterblock and custom loop triple rad, also cooling a mobo monoblock, running on a DDC pump. The GPU is vertical mounted with a riser cable, and custom wired with cables I made myself. I've fresh re-installed drivers, nothing physically has changed inside the PC prior to the dropped performance. The temps immediately rise up to and max out at 57C, idle at 28C. I've set MSI Afterburner to reset to default.
I've called my PC Sisyphus cause of all the problems I've run into with it, pushing areas I don't have much experience on. I'm at a loss as to what has caused this issue, or where to take the diagnosis process next. I'm planning on taking the whole thing apart, but that's a pain and I hope it's something more easy to fix.
Could the riser cable go bad? Could the wiring not be supplying enough power? Could the thermal pads somehow have shifted on the GPU waterblock, or a VRM/something have fried? I don't even know how to check any of these things apart from taking everything apart.