Hi there i have just bought a pre built system from overclokers.co.uk i7 920.... its has a OcUK H2 Flo Extreme Cooler, which has only come with one fan? first i am thinking this needs two fans one either side of the radiator? and i asume air flowing from inside the case out? the problem is the cpu is hitting 90c idle so i know its not working properly! someone help me!