Says otherwise about memory restrictions.
As you can see at 5760x1200 and FSAA the GTX590 hit a wall hard.
What you are looking at is a graph of performance at 2560x1600 with Very High Settings enabled and 4X MSAA enabled and Depth of Field enabled. We are now running this game at the highest possible graphics settings and image quality. What is impressive is that Radeon HD 6990 CrossFireX can do this at an average of 60 FPS with a minimum of 44 FPS! Now only can we now play at these settings, but we can play with extreme performance!
We tried this on the GeForce GTX 590 SLI setup, and it just wouldn't have it. The framerates remained in the single digits and the game was very choppy. The fact is, the 1.5GB of RAM per GPU on GTX 590 SLI is killing the performance potential.