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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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OLOy DDR4 RAM 32GB (2x16GB) Blade Aura Sync RGB 4000 MHz CL18 1.4V 288-Pin Desktop Gaming UDIMM (MD4U1640180BRPDE) at Amazon.com
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