2666 vs. 3200 RAM: What's the Difference? - History-Computer
Most of the Intel CPUs support 2666MHz memory frequency. What if I place higher RAM frequencies (i.e 3200MHz) will they 'sync' in that clock or will they remain at 2666MHz? - Quora
Samsung 8 Go DDR4 PC421300, 2666 MHz, 260 Broches SODIMM, 1,2 V, CL 19 Module de Mémoire RAM pour Ordinateur Portable - Cdiscount Informatique
Is it a big difference between 3600 MHz RAM vs 2666 MHz RAM? Is 4133 MHz overkill? - Quora
memory - Why is my 3000MHz RAM running at 2666MHz? - Super User