Originally Posted by Marv
As a user of a 2560x1600 screen, and a previous user of a "2"GB 5970 and more recently 6850 CF, I know you can easily run out of video memory - it did in Homefront, Dirt 2, Dirt 3 - all with fine frame rates (over 60fps), but terrible stutter. Turn the settings down a smidge - particularly AA, and suddenly it was smooth as.
I currently run two 2GB GTX560s, which perform better overall as there's no stutter. I would have bought higher VRAM 68xx cards had they been available. Two 6950 2GBs were too expensive, and I could only afford around the 6870 level at most.
i've heard a couple times when you play any games especially with radeon cards, and at the same time there some application running at the background like ASUS gamer OSD, MSI Afterburner OSD / OR enabling AA with catalyst controller can make the game sometimes get stutter eventhough the framerate was smooth. and simply turn off those application OR left AA option with "application controlled" will solve the stutter problem..
i dont know if all of those cases were true, but i think its not entirely because lack of vram, some of it maybe due to software issues..