Some advice:
1) 60FPS and VSYNC
VSYNC means that the computer updates the screen at the same time as the monitor does to avoid screen tearing (like ripping a picture quickly as you turn).
A flatscreen is usually 60Hz so you want to ideally tweak settings so your system mostly runs above 60FPS so it can synch with the monitor.
A CRT monitor needs at least 75Hz to avoid the flicker effect.
2) Some games look fine without VSYNC enabled and some look horrible.
3) PHYSX lowers your frame rate. If you can't get 60FPS (or higher for CRT monitor) then I'd lower PhysX or even turn it OFF. Basically with PhysX you are forced to choose between the PhysX effects of lowering other graphics settings unless you have a card powerful enough that you can have BOTH (you don't).
(It's also stupid that the CPU, which is capable of doing PhysX is left unused while the graphics card which NVidia claims is more "efficient" at PhysX lowers your frame rate to do PhysX. My CPU has about 75% of its processing left unused.)
Summary:
You have a fairly nice gaming setup. You will need to learn a little bit more to get the best experience, specifically:
1) VSYNC
2) tweaking AA, Shadows for best quality vs frame rate
3) PhysX (yes or no?)
Again, I personally like, if possible, to get my game synched to 60FPS (VSYNC ON) with my flatscreen monitor. I'll adjust Anti-Aliasing, Anamorphic, and Shadows to do this because I prefer a higher, synched frame rate to slightly better graphics but stuttering and screen tearing.