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16GB (1x16GB) DDR4-2666 ECC Reg RAM
Gigastone 【DDR4 RAM】 Desktop RAM 16GB (2x8GB) DDR4 16GB DDR4-2666MHz PC4-21300 CL19 1.2V 288 Pin Unbuffered Non ECC UDIMM for PC Computer Desktop Memory Module (Desktop ONLY) at Amazon.com