Windows Supercomputer Breaks Petaflop Barrier Network World points out that a Windows HPC Server-based supercomputer has actually broken the petaflop speed barrier, the Tsubame 2.0 computer based at the Tokyo Institute of Technology. "We saw outstanding performance from Windows HPC Server during our Linpack benchmarking run on Tsubame 2.0," said Satoshi Matsuoka, professor at the Tokyo Institute of Technology. "It broke the Petaflop barrier and was on par with Linux at this scale. In a power-optimized configuration, it recorded over a Gigaflop/Watt, showing it is nearly three times more energy efficient than an average laptop. We were very excited to see this level of performance given Windows applications will be an important part of our work with industry partners." Obviously as they report Linux was slightly faster than windows. But an OS which doesn't even intend to be in HPC market, that isn't an bad result at all.