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Hynix Original 16GB (1x16GB) Laptop Memory Upgrade Compatible for HP EliteBook 820 G3 DDR4 2133Mhz PC4-17000 SODIMM 2Rx8 CL15 1.2v DRAM Notebook Adamanta at Amazon.com
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Samsung M471A2K43BB1-CPB 16GB DDR4-2133 SO-DIMM Memory at Amazon.com
Kimtigo DDR4 16GB Laptop Dram 2666MHz (PC4-21300) CL19 (Compatible with 2400MHz or 2133MHz) 1.2V Notebook (SODIMM) RAM Non-ECC Unbuffered Single Rank 260 Pin PC Computer Memory Module Upgrade at Amazon.com