Best high-performance low-noise fan.

[NetKitSkike]

Scythe Slipstreams make exceptional CPU fans, especially the 1850rpm ones.If temps are really giving you trouble you could get the 38mm San Ace fans, they are pretty much the best high performance fans you can get with decent acoustic profiles. _________________ I'd like to start a family, but you have to have a date first. http://www.chung-sim.com/konica.minolta.pagepro.9100.html

 

[Bill Brasky]

I concur with Alexandro the SlipStreams are great fans

So you have this case (here also) with 1 120 up front intake, and 2 exhaust one on the rear @ 140mm and a top one @ 23cm. Is your CPU HSF blowing out the rear?

Firstly I would say to think about a fan controller as this would probably be the most economical. You could then control each fan as I'm thinking they are running at full speed all the time. (ie connected with 4-pin molex to your PSU right?)

If you have $ burning a hole in your pocket you could order some fans and start tinkering around with different setups. Only thing is the top fan is probably not user replaceable unless you get the exact same kind.

With your hardware I would think 2 front 120mm low speed (1000RPM or less) intakes cooling your HD's, then the 140mm rear exhaust and the top 23cm exhaust controlled with a fan controller you could tame the noise well. Unless ambient temps are horrendous I can't see you ever having cooling issues as that case is packed with airflow imo.

I will third the scythe slipstream (get PWM!) and fan controller recommendation. Best upgrade I've made on my computer in years.

http://www.frozencpu.com/products/10026/fan-639/Scythe_Slip_Stream_120mm_x_25mm_PWM_Mid_Speed_Fan_-_SY1225SL12LM-P.html

Silent PC Review

http://www.silentpcreview.com/article832-page3.html#SS-M

"As for performance, well, it was simply the best. Of all the fans we've tested at approximately 18-19 dBA, none could match the 24 CFM the Slip Stream M pushed, not even our reference Nexus fan."