I'd suggest a little overclocking. I have an Ancient lap top that I over clocked to play SR 3 on when I'm out and about. Mainly understand that resolution is the number one killer. 1680x1050 is just way to high for your card. Try 1280x720 or the equivelant for your screen. You'll see a major FPS leap and be able to boost other settings. I've found everything else doesn't matter as much.
Though research plenty if you do overclock. It's the cheapest way to gain performance......unless you fry your rig.
Though research plenty if you do overclock. It's the cheapest way to gain performance......unless you fry your rig.