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Crucial 64GB Memory Kit with (4 x 16GB) DDR4 PC4-21300 2666 MT/s DR X8 UDIMM CL19 288-Pin (CT4K16G4DFD8266) Compatible with OptiPlex SFF, Tower 3050, 3060, 3070, 5050, 5060, 5070, 7050, 7060, 7070 - Walmart.com
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16GB DDR4 2666 MHz PC4-21300 ECC UDIMM for Dell Precision 3630 Tower Memory RAM by Crucial or Micron - Newegg.com
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