Dusting your PC can reduce noise dramatically!

I recently moved to a new house and the room I decided to put my PC is quite big and quite empty thus any sound coming out of my box multiplies by many. So I decided to follow an article I read a few days ago on Lifehacker on how cleaning the inside of your PC can have some great results on noise reduction.
I grabbed a can of air duster from my local hardware computer store, a clean dry cloth and I got down to business. I also found a couple of cables that went along with my Zalmann fans that reduce the speed of the chassis fans to make them less noisy. A few hours and a whole lotta dust later the results were overwhelming. I can safely say that I have achieved a 40% noise reduction and I can once again hear the keyboard click and work nights without waking the neighbors.. Do yourself a favor, if by any chance you have an old PC sitting on the floor, find some spare time, open it up and dust it, you'll be amazed by the results.