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Lenovo Thinkpad T420 14-inch Laptop (Intel Core i5-2520M, RAM 4GB, HDD 320GB, Window 7 Professional 64 Bit) : Amazon.co.uk: Computers & Accessories
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Lenovo Thinkpad T420 RAM SSD Hard Drive Optical CD DVD Drive Upgrade Repair Keyboard Replacement - YouTube
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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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