[musefrog]

I bet it's not your graphics that are struggling, it's the CPU - when you go near loads of other players in a big firefight, there are too many objects to track.

As you've noticed, changing the graphics settings doesn't do much, as that's not the issue.

I'm on a Core2Duo, and since I have 2 monitors I can watch my CPU usage. When in a really busy area, the CPU often hits 100%, and that's when I get the worst FPS and stuttering.

Looks like a six-core CPU is pretty much a requirement for smooth gameplay.