I've recently purchased and assembled a new PC of the following configuration:
Gigabyte PH67-DS3-B3 mobo
2x4 gb Kingston 1333 ram
XFX HD 6870 1024mb gpu
Corsair CX600 PSU
I'm also using a F3 spinpoint HDD, a Cooler Master elite case and a ESI Juli@ soundcard from my previous PC.
Corsair PSU was making that strange high-pitched noise that wouldn't stop even after I shut down the PC and turned off the power. I've given it up for a check and using my old FSP Blue Storm II 500w PSU. And strangely enough my old PSU is also making that sound as well (wasn't the case before).
I'm absolutely positive the sound comes from PSU itself, not GPU or any other component. I've only tried disconnecting the burner yet - it didn't help. The noise itself isn't much of a trouble when PC is turned on and when I'm working/playing but when it's turned off (I sleep in the same room where my PC is) the sound is driving me absolutely nuts. I'm just lying there trying to sleep and the god damn sound is melting my brain.
Please help me solve this issue. Any advice or suggestion is welcome.