I am buying this Mobo and the Rosewill Thor V2 case. my question is what do I need to hook the 4x 3 pin fans into the 4x 4 pin optional fan connectors on my mobo. There are 2x 3pin assist fan connectors which I intended on using for the two fans I add on later.
up top I said 4x 4 pin fans into the 4x3 pin connectors,, one of those actually needs to be a chassis fan , which plug do I need for that???
The 4th pin is actually to manage a fan via PWM, which is different than voltage control. A 3 pin fan is still capable of slowing down or speeding up by the system. It does it by lowering voltage of the fan from 12v down, where as a PWM fan works with a constant 12v source and a separate control voltage (usually under a volt) on the 4th wire that helps the fan determine the speed.
It will depend on the MB, but many 3 pin fans can be controlled for speed.