Originally Posted by Ywap
My gtx 285 is also squeling like crazy when vsync is off. Maybe nvidia should/could let you cap your fps in the control panel?
Well, the squealing can occur during intro films, menus and F@H from my experience.
I have noticed that with a 260 GTX 216 and an 8800 GTX with the 260 GTX having a louder squeal. Some say it could be related to the PSU as when people changed theirs the squealing was said to have gone away, or changing the power cables was also said to have reduced the squealing a bit, though did not make it go away completely.
It's something to do with coils on the video card. Google it and there are ways of making it go away but it involves putting nail polish or hot glue onto the whining component. Though I would not be too keen on doing that.
Look here: http://hardforum.com/showthread.php?t=1391838