DDR4 8GB /16GB 2133MHz = PC4-17000 8GB / 16GB. DDR4 8GB /16GB 2400MHz = PC4-19200 8GB / 16GB. DDR4 8GB /16GB 2666MHz = PC4-21300 8GB / 16GB. DDR4 8GB /16GB 3200MHz = PC4-25600 16GB / 16GB. Plug and play --Get the speed you want, hassle free.
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