For my other laptops (Dell or otherwise), I'd regularly check NVidia's site for updates on the video card drivers and download and install them when needed.
I'm confused about how I should update my NVidia driver for my Dell XPS 17 (L702x). It has this Optimus system, which seamlessly switches from integrated Intel video card to NVidia card. I've tried installing the latest drivers for that NVidia card (it's a GT 555M), downloaded from the NVidia site, but the NVidia installer sais something like "there's no card to install these for". I've checked the Dell Support, and the NVidia video card section there has very old drivers (which I already have). I've also checked NVidia's site for "NVidia optimus drivers" and found some, but those are old as well (sais it's from 2010).
So please, if anyone has this laptop (or another with a similar NVidia optimus system), can you please tell me how I can install the very latest drivers for my NVidia card?