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CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad X220 4287, 4290, 4291 Ddr3-1333 - A13 : Electronics
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Lenovo X220 (X230, X240) disassembly & SSD upgrade guide – Lenovo X220 (X230, X240) disassembly & SSD upgrade guide
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