Originally Posted by Jollyriffic
well after looking at the controlers listed, they are just going to fan headers on the mobo.
no way i'm dumping over $100 to have convenience of a fan controller.
use a pwm splitter that also has the power connector to plug all the fans into it so they work at the same speed (you only get the speed reported for the first fan, but all of them should be running at the same speed as there all getting the same pulse signal) this helps to cut down on acoustics as well especially in push pull configurations on a radiator (but its best to put the fans in pairs (like outputs 1+3 and 2+4 on the splitters I've looked at)
a good pwm controller is an expensive beast and like many things you get what you pay for, of course you can get a decent 3pin fan controller for under $30, and the fans are cheaper two although they don't often have the same low speed characteristics common with pwm fans
if your radiator is mounted horizontally then ml pro fans are a good option in terms of low noise at low speed operations (I have 4 of them in push pull on my h115i and they make less noise than the psu fan does until they go above 55% (which is about 1100rpm) and run as low as 400 rpm......
although most of the time I have them sitting around 850>900 keeping my cpu below 45 degrees (fx8350 @4.6Ghz) so my use will be different to yours and your experience might be different, low speed low noise fans is always use and individual subjective in terms of "good enough" or "hurricane in my ears"
of course a half decent mic with noise cancelling shouldn't hear the fans regardless of how loud they are during a stream so there shouldn't really be any problem with any fan other than if you can hear it over the headphones....