As it stands right now, a single monitor with a resolution of 1920x1080 or less won't normally benefit from more than 1GB of GDDRx VRAM. 2GB+ is indeed necessary for multiple monitors and very high resolution single displays. That's not to say that certain
games won't benefit from a bit
more VRAM. But not knowing his display reolution, I don't see how you can jump to that conclusion. His problem seems to be more related to "stutter" that shows up in mid range cards when used in a 2 card Crossfire situation.