azuz z390

Hello dear friends. I have issue when I trying to overclock i5-9600k on Asus TUF Z390 Plus Gaming WiFI. I Achieved 4.7 GHz all core but above 4.7 (Example 4.8 GHz or greater) don't let me to boot a pc or if booted pc crashes in less ten 1 min. I have good air cooler and CPU temps is great at...