Cooler Master shows off a “because we can” mod of a five quad 2 core CPU system (20 x single cores) stuffed inside of a single ATCS 840 PC case. 53GHz worth of computing power. A Cooler Master 1000W Real Power M PSU was used to power everything. And they used 2.5 HDDs to reduce power consumption and noise. CPUs were water cooled, everything else was air cooled.
Cooler Master’s 5-CPU single-case PC