Question DDR4 3200mhz not working on dram ratio 100:100, but works on 100:133. Why?

[PatrikVujicic]

Hello there. Need your help good people.

Few days ago I bought new DDR4 Ram from G.skill TridentZ model. Its XMP profile is on 3200mhz with CL14. So why can't I use dram ratio of 100:100 with 3200mhz speed? I can use only 2800mhz on 100:100. 100:133 ratio allows speeds over 3200mhz. On 100:100 max is 3200mhz but why my ram isn't working on this setting? Is motherboard capability not good enough or what is it??? I'm using i5 6600k with Asus z170 pro gaming motherboard.

 

[Nemesia]

What is your CPU and Motherboard?

 

[PatrikVujicic]

What is your CPU and Motherboard?

Sorry forgot to add. 6600k with z170 pro gaming from ASUS.