This builds main task is running out Feed The Beast Ultimate minecraft modpack server, this is a kind of repost, though I'll remove the original post now it is actually a full finished build.
The parts choices here were plain and simple. Had to be fast enough to not get bogged down under a decent amount of single threaded load and have the capability to multitask well.
Other things that run on here is a Teamspeak server, Web server, and the mapping software that renders the server map using googles mapping API. This software is fully multi-threaded aware and will take use of 4 of the 6 cores when rendering, meaning that it takes just 30 seconds to rerender any changed tiles and 5 minutes to do a full render. If anyone wants to see the outcome you can find it on http://cydonia.co
The choice for the shinobi is it needed to look good, and be quiet, this isn't being hidden away anywhere, and sits running in my friends room he's here
The other PCs you see is his new desktop (the phantom) and his old desktop (the dell)
Lastly the server is running ubuntu server 12.04 LTS