Help!

My setup:

Gpu: rtx 2070

Cpu: ryzen 5 7500f

Ram: 32gb

Mother board: gigabyte B850M EAGLE WIFI6E

PSU: seasonic 650w

i don't know what's wrong. when i play for example cs2 or gta5 my computer just restarts without blue screen. just restarts and that's it. sometimes it can restart several times in a row.

What could be wrong?