I just got my new computer in Dec - specs in Signature, but my PSU has started recently making humming/vibrating noise.  Especially when playing World of Warcraft.  Although it has started making the noises while just browsing the internet.  So the noise/problem is escalting to a point where the noise is annoying me,

My PSU is 420W.  My husbands PSU is 400W and makes no noises.

I put my computer in for checking the other week - and their tests came back normal. 

I was told it could be my graphics driver needing more power. My graphics is a low end one.  My husbands graphics is 512Mb and still no wierd noises from his machine which is similar to mine, excpet the graphics card.

Should I be worried about the noises. Not sure if the movie embed works, so there is a link.

http://s91.photobucket.com/albums/k292/pearly_pearlsnz/?action=view&current=miscapril2011058.mp4