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G.SKILL, 2 x 8 GB (16GTZR), Black Trident Z RGB 16 Go (2X 8 Go) DDR4 4000 MHz CL17 at Amazon.com
HyperX Predator Black 16GB 4000MHz DDR4 CL19 DIMM (Kit of 2) XMP (HX440C19PB3K2/16) at Amazon.com
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G.SKILL 16GB (2 x 8GB) TridentZ Series DDR4 PC4-32000 4000MHz Memory Desktop Memory Model F4-4000C18D-16GTZKW at Amazon.com
G.SKILL 64GB (8 x 8GB) Ripjaws V Series PC4 32000 4000MHz 288-Pin SDRAM DDR4 Desktop Memory Model F4-4000C15Q2-64GVK at Amazon.com
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G.Skill Trident Z NEO Series 32GB (2 x 16GB) 288-Pin SDRAM DDR4 4000 (PC4-32000) CL18-22-22-42 1.40V Dual Channel Desktop Memory Model F4-4000C18D-32GTZN at Amazon.com
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