Quote Originally Posted by dejanh View Post
I'm running 21x200MHz because I cannot run the memory at 1600MHz with 190MHz BCLK.
Yeah exactly, with limited memory multipliers once you have your desired cpu clock you're basically limited to 2 specific bclks to achieve it, one higher with your memory closer to spec or one lower with vastly under / over clocked memory which isn't usually possible or desirable. Identicle bandwidth can be achieved however through timings and using the spare headroom to push up uclk, so the underclock is a possibility, but it's basically more hassle to end up with the same results so not much point/

They need unlocked memory multi.