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Depicted is the Cray XT5 Jaguar, housed at the Oak Ridge National Laboratory in Tennessee. Using a standardized test, it operated at 1759 Teraflops (trillion calculations per second). Jaguar runs on AMD Opteron six-core processors operating at 2.6 GHz. It has a total of 224,162 cores. I especially love the image of a jaguar painted on the rack doors.
Photo courtesy National Center for Computational Sciences, Oak Ridge National Laboratory