I had an Antec PSU, smartpower I believe that did the same thing after a couple months. After doing a little research online, turns out this happens more often than you think with Antec power supplies. Just google it.
I picked up the 500watt earthwatts to replace it. I know, here I was all mad at antec and I just bought an antec product, stupid me? Well it was either that or possibly worse OEM PSUs at my local computer store.
My earthwatts has been working fine so far. but definitely get that replaced. It could take out your other components. Dont risk it for the love of god!!1
Sorry to Bring Back this Thread from dead But my Pc is Also Having Same Buzzing Sound From The back Of the Cabby.The Friction is So Much that one can feel The Vibration even when he is touching The Desk.....It Stops after 2/3 shutdown-Wait 1 Min-cold Reboot Cycles.Do u Think its The PSU?