Since my goal is to go with a R520/X850 Crossfire, even a 600 Watt supply might not do the trick then. Maybe a 800Watt? External DC supply? I have a 100Amp 12V supply. It weighs about 50lbs, but hey. whatever works. lol.
I think the 1/4" system just doesn't move the volume of water required to take massive heat away, and running a 3.4 P4 at 4.2Ghz, and a 520/540 card at 667/637 produces massive heat. No lie, It heats the room. The Power Supply does the room heating btw. A new, or additional radiator may help in the short term, but a 1/2" system would be much better. I can run the card at high clocks and run the CPU stock, or vise-versa with no problems at all. Combined though it's just too much. It slowly looses ground, and it's kinda cool to watch the temps.
Almost all products out there except the Tt Big-Water are either 3/8" or 1/2". The best pumps made are mostly 1/2". Look at Swiftech or PolarFlow. Those two companies make the best pumps, I think, period. I know that doesn't mean squat, but check em out. Just from my own limited exposure to water cooling, the pump seems to be the key, followed by the radiator. I may be wrong, but thats what I feel. It seems the cooling system's ability to pull heat is related to volume and flow rate above anything else. Many other things have an effect, but those two things are the most important. This system does a real good job, at mild overclocks up to 20% or so, keeps everything nice and cool. The Tt is a begineer's kit. It's neat, it helped me learn a great deal, and it will eventually have a good home in a server that isn't a constant experiment. I do want dual radiators, but have not decided on which ones. I may even keep this one, its not the problem
oints at gimp pump: