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16GB (2X8GB) Memory Ram Compatible with Lenovo Thinkpad T420 4177, 4178, 4180, 4236 Series by CMS A13 at Amazon.com
I have a Lenovo Thinkpad T420 Core i5 2520M. What is the maximum memory I can have - 8 GB or 16 GB? - Quora
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16GB (2X8GB) Memory Ram Compatible with Lenovo Thinkpad T420 4177, 4178, 4180, 4236 Series By CMS A13 - Newegg.com
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