HX850 - Should it sound like this?

[Born_2_Kill_83]

I'm convinced my PSU shouldn't make this sort of noise. Spec in sig when I boot up a game it spools up like a gud-en, after 15mins it's even louder than the video. Really started to notice it since I put a Hybrid cooler on my Xp. It's always been like this so nothing new but I've opened up a post in the past and every-one say's its a quite PSU. Could it be cause it's close to the table and can't breathe?

Here's a video, skip between beginning and end for comparison. Starts making a noise at 22 seconds

 

[Born_2_Kill_83]

I'd say around 18 months, it's always been like this.

 

[Born_2_Kill_83]

Thanks guys, RMA underway!