The virtual reality room known as C6 is located at Iowa State University in Ames, Iowa (where I got my degree in MIS). Nvidia worked closely with Mechdyne to redisgn the room which now has a resolution of over 100 million pixles (2560 x 1600 = 4,096,000 pixels). The room is powered by what appears to be (from the picture) 48 HP computers (with AMD processors) that each have 2 Nvidia Quadro cards. The images are displayed by 24 digital Sony projectors and the room is wired with 8 channel audio as well. Ultrasonic motion tracking technology is used to track the movements of the people inside C6.
When I was at ISU, C6 was still the "best" in the country, but it was not as cool as it is now. Unfortunately for me, I never got a chance to see or use C6. They are not too keen on letting just anyone use such an expensive facility.
For an exterior shot of C6, click here.