I am developing an external parallel graphics processing system that will only use one PCIe slot and will take any 4 PCIe graphcs cards. The idea being that you could process huge amounts of data very quickly. For example between 200-700 fps on current games. up to 3 billion polygons diplayed in real time. At the moment I am trying to determine how much intrest in such a system exists. Image how much that would help with editing and the ability to play back HD in real time. Or just a wide variety of applications. The projected cost is $2400-$6000.