Originally posted by Scott T
Anyways, 5 minutes research turned up the reason ethylene glycol is not useful for computer cooling - it is too thick, and does not flow at high speed through the tiny capillary cooling ducts in a computer.
I added that edit just a minute ago.
One other difference between cooling a car and computer - cars must be able to drive in 90-100 + degree heat without boiling. High-speed computers are generally kept in air-conditioned rooms below 70. That makes a huge difference in the cooling efficiency.
And supercomputers with 1500 degree cores are cooled by freon.