NVIDIA jumped to the top of our TPR graphs when we posted our GTX 580 in SLI article. It wasn't a surprise, as in single form the GTX 580 1536MB is faster than the HD 6970 2GB. Scaling for NVIDIA has always been strong and while I think AMD have pretty much caught up with both companies offering nearly 100% gains in some areas, NVIDIA still has the raw power of the GTX 580 on their side.
We came to two conclusions really when we tested the GTX 580 in SLI. It's DAMN FAST! - And it's going to play pretty much anything you throw at it at, any resolution, at any level of detail."