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Lenovo ThinkPad T420 14-inch Notebook (Intel Core i7 2.8GHz Processor, 4GB DDR3-SD RAM, 500GB HDD, Windows 7 Professional 64-Bit) : Amazon.co.uk: Computers & Accessories
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16GB (2X8GB) Memory Ram Compatible with Lenovo Thinkpad T420 4177, 4178, 4180, 4236 Series by CMS A13: Amazon.co.uk: Computers & Accessories
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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