Most likely your MB is the issue/weak link. Look at MB QVL or Gskill Rm config. There is a reason they only show 6000 to 6400. https://www.gskill.com/configurator?page=1&cls=1529635169&manufacturer=1524715126&chipset=1635734425&model=1635754429&adSearch2=Tested_Speed§6000 MT/s ,
Many 4 dim...