I used to get decent performance but I haven't played in 8-10 months and I'm trying to get back into it. Now the frame rate hovers around 22-24 fps while stationary. As soon as I begin to move my character the frame rate drops into the low-to-mid teens. I started with a resolution of 1440x900 with the gfx options set at the lower end. I have since reduced the resolution to 800x600 with all the gfx settings at their absolute minimum values and have seen no discernible difference in frame rate.
I am using the latest version of Crossover (v15) and I have tested this on two systems with similar results.
System #1
Gentoo Linux
Core 2 Quad 2.4 GHz
8 GB
Radeon HD 6670 using fglrx
System #2
Fedora 23
Core i5 2.5 GHz
8 GB
Intel HD 3000
I would appreciate any suggestions anyone might have.