Thank you for the fast response.
Just to make it short, between ASRock X370 Fatal1ty Gaming K4 and Gigabyte X370 Gaming K5, which board would you recommend me based on the controller and IR PowIRstages used? I'm planning to use a Rzyen R5 1500X and overclock it to 3.8 - 3.9 GHz with 1.3 - 1.35V...