Question RX 580 weird stuffs happening

Apr 3, 2020
Hello everyone! So my problem is the next:
I have a problem where in League of Legends the screen will flash for an eye blink, at different places on the screen, sometimes the whole screen, and that flash sometimes black, sometimes green, sometimes yellow, sometimes red etc. I have no clue what that is, I did a clen install on Windows, I tried with different drivers, also I experienced this "artificating" today, when I installed Steam, it started to flash on the table, but as I said, it's only an eye blink time, and it never happened before on the table, or any ither game, only in League. Also, when I tried to open AMD panel, during a LoL match, the whole PC will freeze and gets BSOD due to graphics card driver crash. The other problem is, I have a 165Hz monitor, and if I set my screen refresh rate at 120Hz, the memory clock would stuck at full speed(2000Mhz). Thanks in advance if anyone have any tips.😁
My specs: Aorus RX580
Ryzen 5 2600
Gigabyte B450M DS3H
500W Chieftech PSU