[citation][nom]dirtmountain[/nom]So does Jonnyguruhttp://www.jonnyguru.com/modules.p [...] 2&reid=153I guess you just can't believe everything you find on a brands site.[/citation]
80 plus is an independant rating site, the 850HX was upgraded to Gold status so unless you're using an old unit you should be fine.
[citation][nom]Proximon[/nom]What's with the limited choice for a case anyway? You seem to want to experiment? CM Storm Scout has handles, or Lian Li Lancool has great air cooling and radiator hose grommets.I did like the inclusion of the Swiftech kit.[/citation]
This editor never uses external radiators because they're too easily damaged, ugly, and make transportation difficult. The only choice not mentioned was the HAF932: There's one in the lab, it's enormous and cheaply built.
Also, there's absolutely nothing wrong with the ventilation of the case used. It's remarkable. It's darned near perfect. The GPU's run hot for two reasons: HD 4890's are horribly inefficient and there's not much space between them.
The other option would have been to face the PSU fan towards the cards so it could draw warm air away from them.