|"Have a fast PC with plenty of memory..."|
Please list your complete system specs. We have no idea which CPU you have, which RAM, or if you have a gaming video card installed. The SSD has little to do with good gaming performance, it just mean quicker load times.
EDIT: "I see you have a GTX 470. That's a very low-end GPU for playing any kind of games"
The GTX 470 is NOT a low end card. It's on the upper end of the charts. Prototype is an old game though so it could be a Win8 issue.
message edited by riider