i need help with my Asus B150 progaming aura

[Dakrai]

Idk whats causing this problem , so when i start my motherboard the fans run for like 2 sec then it restarts and then it boots up again normal , but what it seems to be happening is that it resets my bios settings for some reason i already tried replacing the cmos battery and did the jumper reset same thing , p.s: this only happens when i remove the psu and cut the electrecity completly when i only regular shutdown it stays the same but when psu is off it does this weird thing also lately it be shutting down when im playing games not even demanding ones(league of legends...) and the tempatures are fine , pls i need help