well. a true super computer ISNT a bunch of puters linked together, in that sence. A truly build super computer is typicaly in sevreal LARGE towers and Conditioned air cooled/liquid cooled ( the CIA's code cracker is cooled with refrigarated non-conductave liquid runnign right over the boards)
check out
www.cray.com and look at those beasts , thats all cray does is build super computers