Rust Experimental

I think it's just because the game isn't fully optimized yet. They're still optimizing it and it could take a long time before it's done. For some people it's already playable but i get hard fps drops aswell..
I think you shouldn't be buying a new processor if you could just wait until it's fixed. Maybe it won't even resolve the problem.. idk.
Just my advice. your choise to listen or not to listen xD