now, i'm thinking about virginia's supercomputer, the 3rd fastest when it was created it was about 1 % of other faster computer's price. now, i'm thinking, which is cheaper? one powermac g5, or a couple of stacked linked mac minis operating as one computer. now, for better comparasons, lets assume that the mac minis are the previous g4 models, the cheaper one out of the two. I think that the minis will be cheaper at the same price as the powermac g5. if so, how can it be done? is it very expensive? how will the graphics perform on a computer like this? i'm planning on saving up and buy 3 mac minis and link them up together.