A reader from the Czech Republic sent us his awesome passive build. The silent PC includes a Core i7-3770S (65W TDP), Nofan CR-95C cooler, GIGABYTE Z77X-UP4 motherboard and Seasonic X-400FL, into an IKEA Expedit unit. Lovely and so peaceful.
Editor's note: For those wondering about dust, open-air computers aren't dustier than a coffee table. Fans noisily suck dust into PCs.