KitGuru has tested a modified version of Arctic’s Accelero Twin Turbo 6990 cooler. They replaced Arctic’s stock fans by a model from Xigmatek (Xigmatek XAF F1451/F1452 fans). And here are the results of the noise and temperature tests at idle, in gaming and stressed by FurMark:
28dBa is barely audible. Nice VGA hack!
Read the complete article here: AMD’s flagship HD6990: is silent air cooling possible?