Power supply fan in spinning in an abnormal way?
I just built a computer that uses about a year old power supply and it one day I heard it spinning. At first I thought that it was one of the system fans or a cpu fan but it turned out that the sound and vibrations all came from the power supply and it worried me. Is there any way I can fix it? it starts spinning up for half a second and five seconds later it spins up for another second, then three seconds later it spins up again. it does this all the time at random intervals. Is this a problem with the power supply (DPS-460DB-1A), motherboard (Gigabyte Z77-DS3H and i3 3240), OS (Mac and Windows do this), bios? please help. thanks