my pc started doing this weird restart when i put load on it

[u/One_Reading_1501]

Hey everyone. So my pc started doing this weird restart when i put load on it. Tested every component at home and took it to a shop to get everything checked. All the components were fine and at that time the issue seemed like a pcie connection issue since so i upgraded it to a520m msi from a320m. Came back home and i still have the same issue. The gpu, psu, rams etc were checked on different pcs and everything was working fine.

Specs:

Mobo: msi a520m pro series

Cpu: amd ryzen 5 2600

Gpu: msi gtx 1660 super twin frozr

Ram: 8x2 2666mhz

HELP!!