CPU Z says dram as 665mhz only but i have installed 2666mhz DDR4 (so it should show 1333mhz) | DELL Technologies
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
performance - Why does wmic tells my memory speed is 1333MHz, but Speccy says 665MHz? - Super User