"The AMD Phenom II 975 Black Edition is a speed bump in the line and has all of the attributes you have come to expect in a Phenom II. The Phenom II X4 975 Black Edition is built on tried and true C3 silicon 45 nanometer process for the AM3 socket and has a stock core frequency of 3.6Ghz. Featuring 2Mb of L2 and 6Mb of L3 cache and an unlocked multiplier, the Phenom II X4 975BE is aimed squarely at the enthusiast. The 3.2Ghz Phenom II 840 is a little different. Though it bears the Phenom name, it is built on the Propus core more commonly associated with the Athlon II line. And like the Athlon II, the Phenom II X4 840 has a 2Mb L2 cache, but lacks any L3 cache. The Phenom II X4 840 is also more energy efficient with a 95 watt TDP, compared to the 125 watts of the 975BE and other Phenom II quad cores CPUs. Priced at $99.00, it is an entry level in the Phenom lineup, but at 3.2Ghz it is an entry level that promises plenty of raw power."
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