Hello. Been pulling my hair out trying to figure out what might be causing my crashes.

I get random total shutdowns while playing certain games; I've noticed these to be high frame rate and graphicly intensive games. I've crashed frequently in CoD, Halo, GTFO, RE4R. I've never crashed on 100 hours of Elden Ring (which while pushes my GPU to the limit, is 60 fps max).

My setup is: Windows 11

MOBO: MSI X570-A PRO

CPU: 5800x

GPU: Asrock Phantom Gaming 6900 xt

PSU: Dark Power Pro 13 1000w

RAM: 16gb x4 ram

Computer is about 2 years old. I had problems(couldn't log in to windows without crashing) with a shitty PSU that I got with the thing as a premade, so I swapped it for the Dark Power a year ago, and had no more power issues at all.

Within the last 2 months, I've started encountering these crashes. I took my computer to a trusted repair shop, and they could not get it to crash using furmark and the like. (I noticed that I can reproduce crashes only while running Furmark AND Silverbench Extreme Test at the same time; one or the other won't do it. Furmark puts 6900xt around 110c hotspot, which I know is hot, but hovers at or below 80c for general temp, and its Furmark...) They noted that the CPU was running relatively hot, so I swapped my cooler for the NZXT Kraken for the hell of it. Made no difference with the crashing. I updated my adrenaline AMD driver, and at first I thought that fixed it for a few days, but indeed I am still getting frequent crashes while heavy gaming.

What is strange to me is that the temperatures do not rise terribly. The GPU hovers around 80c, and the CPU from 60-70, playing. (Generally I'm pushing FPS between 90 and 120 bottlenecking my GPU on my ultrawide). I have my RGB linked to CPU temp, and sure enough at the moment of shutdown, nothing crazy happens with temperature, and I notice very little significant performance drops at all in the instant before crashing. It feels like it stops accepting my game inputs for 1/3 of a second, then black screen, then the fans and the lighting remain on for about 5 seconds. If it was a PSU issue, would all of that stuff just straight up die as if I yanked the cord?

I really am trying to figure out if the culprit is the CPU, GPU/Driver, the PSU, the MOBO, or some wierd conflict. I've checked out the RAM, checked system logs for anything weird, reinstalled drivers, and I'm now at a total loss. I'm not sure what I would test next. My own research on reddit and such is leading me to mainly suspect the MOBO, maybe the PSU, and maybe the CPU.

Thanks in advance!