Why Task Manager shows 1333 Mhz and not 2666 Mhz despite adding 2*2GB 1333 Mhz (DDR3 KIT) and CPU-Z shows Dual Channel & DRAM Frequency at 665 Mhz? - Quora
HP 8GB (1x8GB) Dual Rank x8 DDR4 2133 MHz 288-pin DIMM RAM Module SDRAM (726718-B21 ) at Amazon.com
Why is my RAM showing at the 2133 MHz frequency when I bought a 3200 MHz one? - Quora
Why does the RAM memory say 2133 MHz on my PC but 3200 MHz on the box? - Quora
Amazon.com: Crucial 4GB Single DDR4 2133 MT/s (PC4-17000) SR x8 Unbuffered DIMM 288-Pin Memory - CT4G4DFS8213 : Everything Else