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A-Tech 16GB (2x8GB) DDR4 2133 MHz UDIMM PC4-17000 (PC4-2133P) CL15 DIMM Non-ECC Desktop RAM Memory Modules at Amazon.com
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Went from 2666Mhz ddr4 ram to 4000mhz ram and write speed is very low but read speed is good : r/overclocking
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