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OFFTEK 8GB Replacement Memory RAM Upgrade for HP-Compaq EliteBook 840 G3 (DDR4-19200) Laptop Memory: Amazon.co.uk: Computers & Accessories
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Adamanta 16GB (1x16GB) Laptop Memory Upgrade Compatible for HP EliteBook 840 G3 DDR4 2133Mhz PC4-17000 SODIMM 2Rx8 CL15 1.2v Notebook DRAM RAM at Amazon.com
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