So I've had this rig for about two and a half years now. I have a Corsair TX650 powering an i5, a couple of hard drives, and a GTX 260. I realize that the fan on the psu is temperature controlled but even under full load it does not spin at all. Monitoring my temps using SpeedFan my cpu doesn't get over 50'C and my GPU maxes in the mid 60's under full load. Is this simply still not enough to have the fan kick in. I've never had a problem with the system, but I am just wondering if this means that the fan is faulty. Any help with the matter would be appreciated, thanks.