i really dont know, im using my laptop (Dell D820, 2.3 centrino, 1.5gb ram, radeon x600 128mb) to play all my games, and usauly when i use the laptop screen, the games start to stutter, (especially IL2, was fist a online fighter pilot )but when i connect the projector or another monitor for that reason no stutter problems, but reading all the posts it might be the TFT.
but honestly playin on a screen that is 2m or more wide is awsome. if my projector dies one day i'll just buy new one, as their prices are a bit more that the flatscreens, or so where i stay