Cray XT4

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The Cray XT4 (codenamed Hood during development) is an updated version of the Cray XT3 supercomputer, which includes an updated version of the SeaStar interconnect router, processor sockets for Socket AM2 Opteron processors, and 240-pin unbuffered DDR2 memory. The XT4 also includes support for FPGA coprocessors that plug directly into the processor sockets. Otherwise, the interconnect, cabinet, system software and programming environment remain unchanged from the Cray XT3. The XT4 was originally designed for the National Energy Research Scientific Computing Center (NERSC).

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