I have low FPS while I’m playing Rust with graphics card AMD HD 6870 on Windows 8.1. Old Rust legacy just ran fine, but for some reason I think that this new Rust thinks my CPU is my GPU (?), as the activity level on my graphics card shown by Catalyst Control Center is low, while my CPU % is really high. I can’t ALT TAB without it taking ages, when I’m on desktop while Rust is running in the background everything just seems 10 times slower.
This didn’t occur on legacy, running on the maximum quality setting. Everything was fast and fluid, going to desktop while Rust is running wasn’t laggy.
I have a feeling this new Rust puts more work to the CPU, however I don’t see anyone complain about it. When I was searching on the internet for this issue, there seemed to be only 1 guy with the exact same problem/idea as me: http://www.reddit.com/r/playrust/comments/2t0kzn/is_this_game_not_optimized_for_amd_processors/cnv26r9
GPU: AMD HD 6870
CPU: Intel® Core™ i5-2320 CPU @ 3.00 GHz
OS: Windows 8.1 64 bit