Shuttle SDXi Water-Cooled SFF PC
MojoKid writes "Shuttle Computer single-handedly invented the SFF PC or Small Form-Factor PC a few years back. Their line of XPC mini-PC systems, no bigger than a toaster oven, has evolved nicely over the years. This article takes a look at the features and performance of a new XPC from Shuttle that is built on a i975X/Core 2 Duo platform and is designed with the PC enthusiast in mind. The SDXi features a number of unique features like a built-in water-cooler for Radeon GPU-based graphics cards and a slick, flamed-out paint job that you've just got to see." Update: 07/08 23:53 GMT by KD : Here is a link to the version split over 12 pages, in which the images are clickable thumbnails.
I think you're at cross-purposes here. You want a quiet system, but you also want a big graphics card. Most gfx cards today have their own cooling fans (meaning one more noise source in the system). Plus, you want a PCIe x16 card, which means more bandwidth, which implied higher CPU requirements (hey, something's gotta supply those polygon requirements), faster RAM, faster HD (unless you wanna cut your frame rate waiting for textures to load), all of which mean more power, which equals more cooling, which equals more noise. Unless you can come up with some way to cool your system with dry ice or some other high-thermal-differential substance, you're going to have to move larger quantities of a less-efficient medium around.
Just junk food for thought...