Currently Arc cards don't support DX12 games at all through Proton. Nvidia issues are a little more random but they aren't hard to find. Call of Duty WWII ran l

Currently Arc cards don't support DX12 games at all through Proton. Nvidia issues are a little more random but they aren't hard to find. Call of Duty WWII ran like a slideshow regardless of settings on my Geforce 1660 but ran fine on my Steam Deck.