This I came accross on Slashdot, Thought it might be of help to some of you guys, i know i'm gonna do it to my case!
---------------------------------------------------------------------
Posted by Zonk on Thursday March 16, @05:53PM
from the whirrrrrrrrrr dept.
Hardware Games
ThinSkin writes "Armed with a newly discovered soundproofing foam, Loyd Case from ExtremeTech set out to build a quiet gaming rig that hits the sweet spot in both performance and silence. After choosing the right components and insulating the PC case, Loyd's silent PC weighed in at a shade under $2500, scored 5206 3DMarks, and is hardly audible from more than a meter away."
http://www.extremetech.com/article2/...38568%2C00.asp
---------------------------------------------------------------------