An anonymous reader links to an eWeek story which says that Microsoft's "fastest-yet homegrown supercomputer, running the U.S. company's new Windows HPC Server 2008, debuted in the top 25 of the world's top 500 fastest supercomputers, as tested and operated by the National Center for Supercomputing Applications. ... Most of the cores were made up of Intel Xeon quad-core chips. Storage for the system was about 6 terabytes," and asks "I wonder how the uptime compares? When machines scale to this size, they tend to quirk out in weird ways."