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The Mac Pro “Eight Core” 2.8 (Early 2008) is powered by two 2.8 GHz Quad Core 45-nm Intel Xeon E5462 (Harpertown/Penryn) processors with 12 MB of level 2 cache per processor (each pair of cores shares 6 MB), a 128-bit SSE4 SIMD vector engine, and 1.6 GHz “64-bit dual independent frontside buses.” Via custom configuration, this model can be equipped with a single 2.8 GHz Quad Core Xeon E5462 processor, two 3 GHz Quad Core Xeon E5472 processors, or two 3.2 GHz Quad Core Xeon X5482 processors. By default, it is configured with 2 GB of 800 MHz DDR2 EEC “fully-buffered” FB-DIMM memory, a 320 GB (7200 RPM, 8 MB cache)... read more >>