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16GB KIT (2 x 8GB) for IBM Lenovo ThinkPad W Series W520. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
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Lenovo ThinkPad W520 4284 - Core i7 2860QM / 2.5 GHz - Win 7 Pro 64-bit - 8 GB RAM - 500 GB HDD - DVD-Writer - 15.6" 1920 x 1080 (Full HD) - Quadro 2000M / HD Graphics 3000 - 3G upgradable - Walmart.com
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Memory RAM | 4GB - Lenovo ThinkPad W520 W-Series - (OEM-# 55Y3711, 55Y3717, 78Y7385) - 1333MHz, Unbuffered, 1,5V
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CMS 32GB (4X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad W520 Quad Core 4270 4276, 4282, 4284 - C12 at Amazon.com
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CMS 16GB (2X8GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad W520 Quad Core 4270; 4276, 4282, 4284 - A13 at Amazon.com
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