try two things. disable fastwrites and use PCI Latency Tool 2.3 to set your card latency to 64. use em individually and see what you get. if you can just use the PCI Latency Tool option then great. if you have to disable fastwrites you should still use the Tool to lower you latency. smoothed games out for me.
Fastwrites what is that????
And whats this Latency tool.
Sorry to butt in but god i get it all the time.