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The AMD Athlon II X4 640 Quad-Core Processor is a desktop CPU with a clock speed of 3.0 GHz, featuring a 2 MB L2 cache and 4 cores for efficient multitasking and performance. It is compatible with AM2+ and AM3 socket types, making it a versatile choice for various computer setups. This processor is a reliable option for users looking for strong processing power for their desktop computer, with the added benefit of being sold by a US seller for added convenience.