fancy cooling = classic "hide the problem instead of solving it"
Or they overclock to the loving max. The computer shown is two years old so it's probably clocked pretty high. I typically find the cooling the most interesting part of the computer. Almost everything else about the computer involves plugging in a part. Advanced cooling systems require more thinking and more experimentation.
This fish tank computer is good, but I think another way would work better. Enclose the whole computer in a metal box. A common metal like copper would be ideal. It has good heat transfer capabilities and a low price relative to the scope of the project. Encase the entire box in radiators/heat sinks. This would cause a lot of the heat inside the box to disperse out through the box and through the radiators. Along with that you have the pump/radiator combo actually circulating the fluid through the box. An obvious flaw I see with the fish tank is that it is clear and in the sunlight. The sun rays penetrate the tank and heat up the hardware. With a completely metal system much of the heat from any sun rays would either bounce off or be taken care of by the radiators.
Now since you're already spending a mega-forget-ton of money through materials and time spent you'll want to throw in the best parts and overclock them until they can't go any farther. If it worked out correctly you could be running default specs at around room temperature.
You could just get a fancy liquid nitrogen cooling system, but where's the design, experimentation, and fun in that?
P.S. I excluded a bunch of points in my text wall but I'm sure you can figure it out. Too tired to type more at the moment.
