Lenovo ThinkPad 15.6" T520 Core i5-2520M Laptop Windows 10 4GB RAM 320GB HD DVD WiFi Power Adapter
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Tuning the Lenovo T520 - Upgrading Memory and Installing an mSATA SSD • Helge Klein
CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T520 4239; 4240, 4241, 4242, 4243 - A13 at Amazon.com
16GB KIT (2 x 8GB) for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
CMS 8GB (1X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T520 4239; 4240, 4241, 4242, 4243 - A14 at Amazon.com
Amazon.com: Lenovo ThinkPad T520 - Intel Core i7-2640m, 2.8GHz, 500GB HD, 4.0GB RAM, Windows 7 Professional 64-bit : Electronics