I've been having this really weird problem with my high-end gaming PC for about two months now. Here are my specs: I'm running a Gigabyte RTX 4090, an Intel i9-14900KF, and an Aorus Elite Z790 AX motherboard. My cooling setup is the H150i Elite Capellix XT, and I have two 2TB Samsung 970 EVO Plus SSDs. I also use a Corsair 1000W PSU.
The issue started while playing Minecraft where I experienced random lag spikes and ended up with a locked 15 FPS, despite not using V-Sync or anything similar. The crashing began after that. I noticed when I go into the BIOS, it almost crashes my PC when I scroll through it—yet, scrolling within a tab in BIOS doesn't lag at all.
The problem has now spread to other games; I initially received an error saying 'your device ran into an error' before my PC froze completely. After rebooting, the error sometimes doesn't show up, but the crashing continues. I've checked the logs but couldn't find anything useful. Last week, I tried swapping my 4090 with an older RX 580 and changed my PSU to a Be Quiet 650W. When I booted with both PSUs—using the 1000W for the rest of the components and the 650W for the RX 580—the lag in BIOS disappeared. Now I'm left wondering if the issue lies with the GPU or the PSU. I did change my CPU, which fixed some other freezing issues, but this particular problem persists. Any advice would be greatly appreciated!
1 Answer
You should definitely run some benchmarks on your 4090, like 3DMark or Geekbench 6, to see how it's performing under stress. It can help identify if there's a hardware problem with the GPU.

Hello! I ran those tests but didn't notice any irregular behavior or artifacts. It seems fine during benchmarks.