For the past week or so, it has been near impossible to play the following Steam games: Stalker 2 (UE5), Misery (UE5), Satisfactory (UE5), House Flipper (Unity!). At some point within 20 minutes of playing, opening a menu, map, inventory, or pause screen, etc. will freeze and crash the game. There is no bug report afterword, just a crash to desktop. I have many hours in all of those games, and never had a problem like this before. I play satisfactory and/or stalker daily. I thought it was a UE5 thing but maybe it is a DX12 thing? 2D games work fine. I have tried various proton versions through steam to no avail.
Operating System: Bazzite 43 Desktop
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
Kernel Version: 6.17.7-ba19.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 5700X3D 8-Core Processor
Memory: 32 GiB of RAM (31.2 GiB usable)
Graphics Processor: AMD Radeon RX 7800 XT


In case you’re dual booting - Windows also has a memory diagnostic tool. This did identify my RAM as broken almost immediately, while Memtest reported everything OK after a full scan of several hours. As I only knew Memtest back then it took me weeks to find why my PC was constantly randomly crashing, until I learned of that.
But that was about 2 years ago, so maybe Memtest did improve since then? (Or maybe I had some very weird behaving RAM and finding it with other tools was just pure luck…)
Did you set different timings while you were in Windows? Looks like MemSet can do this. I would assume not though.
But, yeah, thank you for mentioning that memory tool in the OS. Had no clue it even existed.