Oh, that sure cleared up a lot about sli for me! I guess that's why it's not more of an improvement than it is. Does crossfire work in the same way?

Guess that means that your displayed info was right too.

Crossfire works under the same principle.

The only solution that doesn't obey this rule is the dual-gpu card.

Let, me solve this issue: sli doesnt necessarily double your amount of ram on your system, but both cards are working together. But just make sure your video card can run sli, not every one can, especially low-end ones. Like I dont even know if you can play a good game like call of duty or world in conflict at super-high quality even with two 512MB cards.