Glad i found a FREE (yes oO) Maximus IX Extreme, ok iam not a 2019 guy.
Sadly this board is doing worse than my z170 pro gaming....
i cant find stability at same timming (cf my screen before) ... 3733Mhz 14-14-14-28 2T, almost everything fixed, also RTL/iOL @ 57-56-7-6, i managed to reach the same perf than with the pro gaming but that was a very hard war. That board sometime that booted at 3866 stable ingame on win10 for hours...!, i was so happy, but next reboot gave me code 55 or 49, couldnt understand. Same story at 3733 even with tRDWR fixed at 14 or 15...but today its ok ROCKSTABLE ! did i miss something oO ? a boot voltage...? Grrr ! but i enjoy:b