no Dave-So , you do NOT want a radiator! >whomever thought to put a water cooled device (radiator) >in an ALL electrical system was smoking a little too much >homegrown that day :) No risk there, water itself is an electrical isolant... It's the ions in the water which act as the conductor... Most sane watercooled systems users use distilled water, which is a pretty good isolant. Also, the water is not in direct contact with the motherboard and CPU anyway... I have been thinking about this kind of system for a while myself, because of the SILENCE! No fan noise at all :) As for peltiers, they have drawbacks : the overall heat output is largely positive. It does cool the CPU, but heats all the system (chipset, that already very warm GPU, RAM chips...).