The only tablet >1.1 gig cpu with a seperate video card is the Toshiba m200.
Truthfully, a tablet pc isn't a great gaming machine. The 5200go card with 32 meg vid ram on the m200 is okay but won't be cranking out the FPS in Doom3.
For a student though, I can't recommend a tablet pc enough. It is great. Applications like OneNote and GoBinder make the tablet pc a fantastic notetaking/study tool.
I had an Acer 1712 and sold it to buy the m200. If I want a gaming...