Check this out:
Fount it here: http://www.aquatuning.de/product_inf...leistung-.html. It's an external (obviously) cooling unit that can handle up to 790W!
A quick estimate of power output by some common components:
QX9650 @ 4.0GHz/1.4V: 217W
8800GTX 3-SLI: 3x170W=510W
MB: 3*20W (NB, SB, mosfets): 60W
So what about one of these to cool your system? It also comes in two smaller versions, rated to cool 265 and 395W respectively. Power consumption of the biggest unit is 375W.
Some other specs (google translate from german beware!):
"The smallest unit of the series, the Ultra 300 produced just 20 dB and is quieter than a household refrigerator"
"There are temperatures of up to 4 ° C is possible"
"Alternatively, can the Chiller at a value just below ambient temperature to the problem of condensation is to be avoided"
"Due to the low water temperatures are unprecedented opportunities for overclocking"
"We recommend the Chiller as an additional source in a refrigeration system in addition to an existing radiator"
"Recommended water run: 1200-3000l / h"
Oh, yeah and price listed on this site is €400=$608