They do make a whiny motor noise but get more air flow than nexus fans. I don't think the extra cfm will make much of a difference with the pa120.x because the fin pattern. If you seen the new pa120.x, the fin pattern is less dense. Very simliar to pa160 fin pattern. Marci has pictures available I believe.
Nice to know you guys are focusing on more towards silent WCing. If i have to buy a new rad for my pelt setup looks like I have an easy decision.
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