the IBM Blue Gene series, which uses low-power processors to avoid heat-density issues, the Power 775 was a water-cooled rack-module system, and each module was 34 inches wide, 54 inches deep and 3.5 inches high (2U). Each drawer comprises 8 cache coherent nodes (each of which can host single one or more O/S images) with a MCM with four POWER7 CPUs each, and 16 DDR3 SDRAM slots per MCM for a total of 256 POWER7 cores and 2 TB RAM. Each drawer has 8 optical connect controller hub chips, connecting neighboring MCMs, PCIe peripherals and other compute nodes in a dragonfly network topology. One rack can house up to a dozen Power 775 drawers for a total performance of 96 TFLOPS. The system supports up to 24 terabytes of memory and 230 terabytes of storage per rack. It is estimated to achieve over 94 teraflops per rack. See also High Productivity Computing Systems DARPA IBM Watson - built on a similar (Power 750) air-cooled platform References External links Power 775 product page IBM wins DARPA funding – IBM.com High Productivity Computing Systems (HPCS) – DARPA.mil IBM supercomputer platforms Parallel computing