I have a kit of 3600Mhz ram and I managed to get the CL to 16-19-19-34, and then I tried to push it to 4000Mhz 17-21-21-34, but the read speed of it are only 44K idk why? While 3600 read speed almost 60k, does CR matter also? Cuz I can push 3600CR1 while 4000 can't đ