I don't find it to be worth it as like iTouchedYou said, the ref. 5850 runs cool on the stock design. Although the Vapor-X is quieter and cooler a bit, there is no need for it because I use a reference design 5850 running 950/1205 1.16 and at 50% fan speed, it is audible, but if you have headphones or headsets on for gaming or music, you won't hear the fan at all... So just get the reference design, save money and CF.