The QuadroFX 4400 512 MB card has just hit the market, right as nVidia's GeForce 6800 512 MB cards (which are based on the exact same design, funny that) are hitting store shelves as well. We've got the remarkable opportunity to test our two of these QuadroFX 4400 512 MB cards, not only in single card configuration, but in a dual-card SLI configuration as well. Curious how 512 MB of video memory affects games and applications? Curious to see if SLI helps workstation applications? Curious to see what a full SLI system with 1 GB of combined graphics memory is capable of? Us too. Let's continue.