Recently bought a ds3 and a 6600 conroe, put it all together a it runs fine except the cpu fan does not rotate at start up. It tries to start up, does a few spins then stops. I have to restart the pc about three times then it spins all the time and doesn't stop and i have left it running for 12hrs+ without a problem, then if you turn it off for 5mins and turn it back on it does the same problem again. I have a 7900gtx so i thought it may be a power issue (480w Tagan) but i unplugged everything i could and it still did it, i even bought a 580w Tagan and still the same problem. Anyone had the same or any ideas?