There is a writeup of a silent PC over at trustedreviews, that covers a lot of the theory behind the noises the PC makes.  For those of you who have sworn off air, and gone back to living in the water ... you're covered too!

Have a great weekend.

"It doesn't even have to be a particularly loud sound to be distracting - a relatively quiet noise containing a strong tonal component such as a high frequency whine or a low frequency hum can be just as irritating to some people. Fortunately, there are now numerous noise elimination products available to purchase, either as add-on components or devices that replace the existing cooling fans in your system — these components are designed to reduce the sound of a noisy PC to barely a whisper. "

Here are some more Cases & Cooling reviews from around the web:

   CASES & COOLING

• Asetek KT03A-L30/115V WaterChill CPU Cooling Kit Review @ MODTHEBOX.COM
  
• Zalman Reserator 1 @ bit-news
  
• Swiftech H20-8501 @ BoPC
  
• Swiftech MCW-CHILL water chiller review @ Procooling
  
• Asetek WaterChill Kit @ MHW
  
• Asetek Antarctica WaterChill Kit @ overclockersclub