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Crucial DDR4-2666 16GB UDIMM CL19 Memory at Amazon.com
Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 2666MHz (PC4-21300) C16 Memory Kit - Black at Amazon.com
16GB DDR4 Ram 2666MHz (PC4-21300) 1.2V CL19 DIMM Memory Module for Desktop PC, Acclamator Computer Memory at Amazon.com