no.... if you modify it, warranty void. fair enough. if your psu goes bang and takes the card out, warranty void. again, thats fair. if your card goes bang or develops a fault of its own and you havent modified it in any way. its covered.
In the case of a PSU going bang, the PSU manufacturer would be 'responsible' but since you're not going to get anywhere with that, your only option is to RMA the board, which in my opinion is perfectly fine since it broke through no fault of your own.