I installed the AlCu version on my BFG 6800 today. Finish is very nice, just as nice as my 7000A cooler for my cpu. Noise wise, I cant hear it, its running on the 5v connector. A lot better than the two 40mm running in the stock hsf. Cooling wise its ok. It idles two degrees lower around 50-51 celcius, under load similar situation. Overall, i'm happy with it but this is holding me over til I get a water cooling setup.
