Check this thread I started out at OCForums, read the 2 posts by Rainless
http://www.ocforums.com/showthread.php?t=496431
He said he found a post contributing the noise to the older cards - which was supposedly fixed.
Now, I don't know if your retailer that you exchanged with 4 times is large or not, but if they aren't maybe you got all 4 cards from their original shipment batches?
But then that doesn't explain why my new card from NewEgg is buzzing (although its not that new, got it around 1/6/07)
http://www.ocforums.com/showthread.php?t=496431
He said he found a post contributing the noise to the older cards - which was supposedly fixed.
Now, I don't know if your retailer that you exchanged with 4 times is large or not, but if they aren't maybe you got all 4 cards from their original shipment batches?
But then that doesn't explain why my new card from NewEgg is buzzing (although its not that new, got it around 1/6/07)