I'm not too sure if it can be upgraded. Which G75VX specific model do you have? Which video card does it currently have? The above upgrades you have done must make your computer run much better. But honestly I don't believe getting another video card will benefit very much right now. For instance the NVIDIA 660 vs. the 670 isn't very much of an upgrade... And you would probably pay way too much to get the 680. It might be better to wait a year or so and see if better laptop video cards come out.
Can any one confirm that the video card is upgradeable or not? and if so, what can it be upgraded to?
I just installed a nice 120gig ssd, and 8 more gigs of ram... I LIKE it.
There's no upgrade for the G75VX, the GFX card in your case GTX-670MX is a custom design for the VX model! Unlike the G75VW that has the GTX-670M, or the GTX-660M (660M mostly the Best Buy model ) both are custom cards also!
