Does the idea of a personal supercomputer appeal?
There are a number of different solutions available for the personal supercomputer, of which this latest unit Microwulf: Supercomputing on a Budget is just one. This unit uses Micro-ATX motherboards with dual-core processors all fused together over gigabit-ethernet to produce a single, small, and comparatively cheap but powerful little machine. Compare it to a commercial solution like this one.