ledhead11 :
Most games these days have a use what you give 'em strategy so some numbers won't always matter. Generally here's what I've seen with my TI and 1080's. Game settings can have a lot to do with Vram usage as well but for many by the time you crank it all up the clocks become an issue.
I gobbled up way more than 3GB just with Crysis by using mega custom settings.
Very long draw distance for objects, huge shadow map, etc.
If you want to see VRAM munching, checkout the OCN "best Skyrim pics" thread.
Ian.
PS. ledhead, just sent you a PM!