Perfect examples of prebuilt are those wimpy little
Ahanix Iceberg Watercooling Kits or
Thermaltake Aquarius 2 Watercooling Kits. The tubing is much too small in diameter to get the required amount of water to the CPU/NB/GPU blocks to cool them efficiently. Also, the components obviously are lacking in quality (The blocks, radiator.. everything)
I dont recall where it was.. but I saw a review of the Aquarius 2 and it got beat by a Vantec Aeroflow.. That said, a 947 and 92mm Tornado at full pelt could lay a hurting on lots of cooling solutions, including water :evil:
So yea.. stay away from those prebuilt water cooling system for n00bs, get a kit with nice, very high quality parts like a Swiftech, or DangerDen