So based on my experience I've never seen my 660ti ever use more than 1.5gb of ram. I looked into it and realized that the 192 bit bus is a mismatch with 2gb ram. it has 3 64 bit controllers for 512mb then what happens to the lat 512mb? It got me thinking about the gtx 670 how it is has 256 bit bus scales perfect with 2gb and has more bandwidth. Anyways I only play on 1080p and I use msaa up to 4x. So far I haven't ran into any real lag in any of my games but for some reason I feel like I'm bottlenecking my cards full potential cuz it never goes past 1.5gb. In practice I probably won't need more than 1.5gb but the card was advertised as 2gb and I feel disappointed.