Each PSU delivers power, some a little more efficiently than others, but they all carry the same drawback: with the increase of power, you guessed it, you generate more heat. So this, in itself creates a new problem. Vantec has done a good job of remedying this issue by using 3, yes 3, double bearing fans which can be adjusted via rear switch. You have the option of selecting “Slow”, “Medium”, or “Auto”. The “Auto” setting relies on an internal sensor to detect the temps, and adjust the fans accordingly to meet these needs. I’ve looked at PSU’s with a similar feature; Antec’s True Power Line offers a similar feature but lacks the switch, which I really like.