Cray CX1 Supercomputer
Cray is famous for selling the world's fastest (and most expensive) supercomputers back in the 80s. The company eventually went bankrupt and the name has been sold several times since then. The Cray CX1 is a "low cost" (e.g. about the price of a nice new car) supercomputer based on Intel Xeon processors. It does run Windows, but the awesome looking case makes up for that, and I imagine you could run Linux on it if you wanted to.