Maybe in SLI, but if you want all the graphics turned up in todays games, it's just not enough at 1080p. If you want a single card to perform like that gotta have GTX 670/680 or HD 7950/7970.
But you don't add any?, i know i remove all AA in Crysis 2 and every other game for that matter so maybe that's why i use less, i don't use any blur effects neither.
Then it'll be my tweaked game.cfg that causes me less vram utilization, if it did scale then i'd maybe have seen more than 1.7gb by your reasoning yes?
1+ Don't take it away.. P.S: signex, I have a Asus G51Vx too around here somewhere. But with the P7350.