Do you see a crash/hardware error event in reliability monitor? I'm also on a 4090 and experiencing the same since the initial early access of the game.
https://forums.playdeadlock.com/threads/gpu-constantly-crashing-with-livekernelevent-141.26591/
Over 1 year later, I'm still experiencing this issue. I just came back to the game, and it's still the same scenario. I just went 3 games without a crash, then I crashed 6 times within the same match.
Problem signature
Problem Event Name: LiveKernelEvent
Code: 141
Parameter 1...
Deadlock crashes my GPU (RTX 4090) every 10-30 minutes with a LiveKernelEvent, the game quits, and all my displays are reset. Sometimes it happens in the menu when I'm not doing anything, but usually in-game during a match. Sometimes in a big team fight, sometimes when I'm sitting in spawn. All...