CPU speed don't enter into it. Anyway, now I've recommended both that you play this game and that you avoid it. Maybe you should make a date with a walkthrough. The graphics are, as I said, very good. The design of the locations is terrific, in places.
Characters shift and move even when they're at rest.
You can make out some polygon-ness in the models, but the facial textures are fantastic. Even the music managed to impress me a couple of times, and soundtracks rarely attract my attention. The storyline is, well, pretty generic stuff. You do the stuff and defeat the Evil. Big light show, game over.