You're doing it wrong. Just play it on medium or low. You'll get your 60fpsPCgang too but let's not act like we getting 1080P/60fps on any old setup. I still ain't seen 60fps on Larry Dogs.
Like I said in another thread, I don't think people even care about 60fps. If they did, you'd see more 60fps games on the consoles. For most people, graphics > fps. Devs know this and that's why we see so many 30fps games