Please tell me

After turning on, after a few minutes, the computer freezes, the screen is turned off and on, and then the computer works without problems until it is turned off. I do not start anything from the programs or games at the time of this problem. I7-10700, 16Gb RAM, 1060 6Gb, Z490 Gaming X from Gigabyte, PSU 750W from Gigabyte. Collected recently. Everything is new except for the video card. The problem does not repeat itself every day, but the time interval from switching on to freezing is the same. The firewood on the card is the penultimate one. The version of Windows is new (I updated it recently), but I did the reinstallation for a long time (either my hands do not reach or there is not much time).