pc noise absorber?

ok so I treated my room for acoustics a few months ago and my pc is still causing noise in an otherwise dead quiet location (in the country outside a town of like 100 - no highways or railroad tracks...no anything). So here I am still trying to clean up recordings that shouldn't need anything. It's not bad if a whole band is playing, but if I'm trying to do a voice over or something...forget it, pull out the dynamic mics because these condensers pick up too much noise. So I found this product Be-Quiet, a noise absorber for the inside of your pc. It looks to be a consumer product with thin acoustic foam and possibly some sort of acoustiblok or other similar type stuff on the outside of it. has anyone used it? 

I'm also considering DIY stuff like putting my own stuff inside the case, or simply making a small wooden frame or box and covering it with acoustic absorbers like auralex or oc-703 fiberglass, leaving a bit of room for my computer to breathe inside, and probably an open back or side or something. Any thoughts on either commercial stuff or diy or diy designs would be helpful. Thanks.

I've heard watercooling is noisy. And makes "slurping" sounds at times.. be careful before you decide to do something like that. 

I would replace noisy components in your PC or try and isolate the PC it self

I have the Coolermaster Sileo 500 case which has acoustic foam throughout and, whilst it is definitely quiter than a normal case, it's not that much quieter and gets quite a bit hotter as it only has fans on the the front and rear.

If I were you, I'd be looking to replace your fans with either the Xilence or Noctua quiet fans.  I actually tried several different fans before settling on these and they were significantly quieter than most of the others (other brands may provide better performance but this was from my personal experience).

There are also inline voltage adjusters which will run the fans slower thus giving less noise but if you use these then you'll need to ensure that you've got some sort of temperature monitoring software running in the background on your pc until you're happy that it's not overheating.  You may actually have some quiet fan settings in your bios which will do the same thing.
Keeping the fans and heat sinks clean will also help a little.
The noisiest part of my PC is now the graphics cards but in the Radeon drivers there are settings that allow you to manually specify the fan speed and I just drop this down to minimum whenever I'm recording.

That link isn't 'noice".

http://www.endpcnoise.com/