Asus 5850 fan issue?

[Bergkamp]

Hey, recently the fan on my 5850 has been making some odd noises. It idles at 21% and can't really be heard, no problem, but when it hits the 25-30% area it makes a horrible rasping sound. It starts to fade over 30% and is gone by the time I put it up to about 40.

It looks clean enough, and there doesn't seem to be any obvious damage, so I'm just curious as to what might be the cause. Any ideas?

Thanks

 

[Mana]

dead insect on the card. hitting fan?

 

[aspirins]

had same problem, mine was a small spider though. is that an insect? i never know what is and what isn't?

 

[Bergkamp]

Easy enough to open without making it obvious and voiding warranty?