Have the same issue with the same card. I just found out that this card was the source. I disconnected the fan on the card for a few seconds but the noise was still there. I removed the card completely from the board, the noise goes away. So yes, it's definately from the card itself. Probably from some electronic components on it. It's a high pitch noise like around 12-14khz, it changes and gets higher when I move the pointer or scroll the page and it's killing me. Thinking about downgrading back to my 8600GTX.