I'm currently running two GTX 460's 768mb in SLI. For the most part things are working great but I do have one issue. In games like Dirt 2 and Dragon Age when there are many particles (dirt, smoke, etc) present I'm getting a noticable slowdown in FPS. The only thing I can think that may be causing this is a lack of video memory but then again I would think that 768mb would be sufficient for 1920x1200. Is this the case or can someone else who may be running this setup give me another suggestion as what the problem is?