Graphic card buzzing noise

[inf]

Hi all,
I have a question a friend has a pc which makes strange sounds. I checked it out and it was coming from the graphic card. It only makes these sounds when the graphic card is underload. Its a nvidia gts250, is there any reason why it should be making noises like this?

 

[jeepster50]

The GPU fan @ it's higher speeds is vibrating, might be dust build-up or the fan is failing. Just clean it out & see if it helps or replace it.