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Installing an Intel CPU and heatsink - Alienware X51 - YouTube
Amazon.com: WWWFZS MotherboardsKM92T, Fit for DELL Alienware X51 R1 System Motherboard 1717 cm DDR3 H61 Lga 1155 Motherboard Original Desktop Mini Itx 0KM92T KM92Motherboard Processor Motherboard chip : Electronics