Cobalt3 Pyramid V Fan Silencer Review @ Big Bruin

"The only downside I can see with this device would be for people who may want to have some kind of manual control over their fans. Although the full automation of the device is very convenient, the lack of manual fan speed control or adjustable thermal set points will not appeal to all users."
Basically this is a thermally controlled fanbus that reads the current case temperature and adjusts the fan RPM accordingly. Not a bad little device unless the fans run at full RPM all the time.

Related Web URL: http://www.bigbruin.com/html/pyramid_v.htm