Just put together my build. EVGA P55 SLI, i7-875k and Artic Cooler freezer Pro Rev 2 fan. The fan has yet to turn on, it is pluggedinto my jcpu 4 pin port near the cpu. My current temp reading from my led on my mobo is 63 (celcius i'm guessing). Should it be running? It spins for a nanosecond if i remove and replug it in.