4700ghz

Hello! I got brand new i7 10700k with Gigabyte Z490 Gaming X motherboard. I tried to OC it in BIOS to 48/49/50/51 - it does not really matter. Clock is jumping between 4.6 and 5.1 in idle (in task manager) however during stress test it locks to 4.7 and no matter what I do in BIOS it just...