"I have wanted to build a fully passively cooled computer case since I had my first Athlon Thunderbird 800 MHz. That time the fan noise was amazingly high, and manufacturers didn´t much care about the noise levels, and didn't offer products for building a quiet PC. Nowadays a quiet PC is not much of a challenge to build, but totally silent? It would require that there were no moving parts at all. But of cource there has to be the compromise of a hard-drive. One could buy a SSD drive, but at least I don't have that kind of money to spend. :)"

So what Ville from MetkuMods did was to build himself a 100% passively cooled case from copper and aluminum blocks and heatpipes. A step by step log of the process can be found here.