Quietest PSU Please!

[eljaes]

Hello, I recently bought a Hiper modular 580 PSU from OC but am dissapointed in the noise it makes as I was wanting to build a machine that can be left running overnight in my bedroom. It isn't extremely loud, but loud enough to be annoying
Can anybody advise me of a good quality PSU that is VERY quiet? Any advice would be of great help, thanks

 

[eljaes]

thanks, but i had also 'heard' that the Hipers were pretty quiet also..... then i got one
I must admit though, I was originally going to go for a seasonic (wish I had now!)
Does anybody have an extremely quiet PSU in the 500/600w range? if so please let me know what type it is

 

[eljaes]

I have the Enermax Liberty 620W - I can't hear it at all. The only way I know it's on is that the PC powers up.

Hav

Now that seems more like what i am after, out of interest, what case do you have it in?