In the USA there is no such thing as a quite enviroment. I grew up in the mountains of Washington State where there was zero humans around for a couple miles in any direction and the wild life noise was far more that what my computers are. I now live in the city and the surrounding enviroment is louder than my computers are. Unless you live in sound proof room then.....
AND 20-25CFM fans are NOISELESS to the human ear. I put them on a DBA meter. Their frequency is below human hearing levels. So don't give me the only silent fan is a disconnected one.
You jsut need quality ball bearing ones.
But non the less this little quests are what bring out great ideas, concepts, and creativity which is all good.
What I need to figure out is how to water cool those little voltage regulators that the 4 heat sinks are attached to on my 8K7A's. Those are very very HOT to the touch. You will burn your finger hot. I placed a fan over it and it becomes more stable when over clocking, but if I could water cool those suckers I could get much higher, stable OC's.