Updating Graphics Drivers

Hi there, I'd really like to find out how to update my graphics drivers on my graphics card, or to see if theyre up to date. How would I go about doing this?? I have a Dell with an Intel Xpress Chipset.

The main reason I want to update is because In playing Sh3 the game doesn't model reflections at all. Secondly, if I do update the drivers and get reflections, would this cause a FPS drop?? Or would it be fine?? Right now I get about 20-30 Fps in the open ocean and about 15-20 in harbours with GWX 3.0 installed.

Thanks,

Casey