Hi, I was wondering what is the best fan that is quiet, but still moves a moderate amount of airflow for the Prolimatech Megashadow (it's just a Megahelem in a black color)
San Ace is pretty loud you have plenty of other options that do almost as much cooling for a lot less noise that won't require you to undervolt at all..
Here is a chart you will love for Megahelem Fan Comparisons:
http://www.overclockers.com/65-fans-tested-megahalems/