As for the vram thing. I have the 1.5gb 580's. Cry sis 3 and far cry 3 both get playable framrates. But feel jerky. That's because my vram is maxed out.
I play at 2560 btw
People keep mentioning DX 9, 10, and 11 like the direct x level dictates how demanding the game is and how good the graphics are. This is untrue. While new DX standards do help the devs make the game look better with new tech. That does...