Quote Originally Posted by =sw=warlord View Post
That's because the 4 pin fan plug is usualy for the cpu fan, not case fan.
I have yet to see a 4 pin case fan.
My understanding is the 4th pin is for temperature seeking, for the fan to find what temp the cpu is.
A few of the cpu heatsinks ive got use a thermocouple on the bottom of the fan for sensing the heat of the heaksink.
Hahaha.