I've been lurking on the SPCR forum for a while, ever since somebody commented (over the phone!) that my PC sounded like a turbine
When I saw this though, I realised that I had to register to post this.
It's a high end, prebuilt system with zero fans - not watercooling with a rad fan, not low speed fans, not ducting or anything else - ZERO FANS.
How do they do it? Well, with the mother-of-all heatsinks masquerading as a case, a small flock of heatpipes and a serious amount of planning, engineering and ingenuity (and no doubt R&D Dollars)
So far I haven't found a review of it with any really good internal pictures, but I've linked below what I have found. That I can see the key to the amazing silent cooling is the number of heatpipes used for each component (I count 7 heatpipes on the CPU in one photo, and it doesn't even show the whole CPU!).
The only potential problem with this system (besides size, weight and cost) is the noise of the hdd's - they do not seem to be in any kind of enclosure besides the case, and the choice of drive could be better from a noise point of view. But an enthusiast could quite easily fix this minor problem (and it may not be a problem - we need a decent review of this machine, with some high res photos! I'm guessing in the dark here).
So yeah, it's the ultimate silent machine - at a price.
http://reviews-zdnet.com.com/Voodoo_Rag ... 90114.html
http://ecoustics-cnet.com.com/Voodoo_Ra ... tag=review
http://resource.voodoopc.com/gallery/im ... 0x1024.jpg
http://resource.voodoopc.com/gallery/im ... 0x1680.jpg
(Edit - Realise it's based on te TNN500A case, and that that's been on the forum before. Still, I think what I've posted is still useful to people who want a silent prebuilt system. Searched the forum and not once was Rage F:50 listed, but TNN500A is all over the place