antec tricool 92mm dbb case fan with 3-spd switch 3 4-pin 3-pin monitoring
1 . double ball-bearing design lasts longer than conventional fans .2.3 - speed switch lets you balance quiet performance with maximum cooling .3.3 - pin and 4-pin power connectors provide convenient connections to your motherboard or power supply .4 . fan-speed monitoring capability included requires compatible motherboard