Usually it shuts down in game Smite, but in couple others too , smite is running on lowest , sometimes play Ark survival evolved on max and it plays smooth, not sure but i think it might be Power supply , but i did check friend PS it was 50W more than mine , this are my specs down , i just cant get which part is at fault.
Sometimes it does reboots the pc or even freezes the black screen , sometimes with sounds sometimes without.
AMD RYZEN 7 3700X 8-core processor 3.60 ghz
Ram
16,0GB Dual-Channel DDR4 @ 1199MHz
PS
Corsair CV550
graphics
PHL 223V5 (1920x1080@60Hz)
4095MB NVIDIA GeForce GTX 970 (NVIDIA)
Motherboard
Micro-Star International Co. Ltd. MPG B550 GAMING PLUS (MS-7C56) (AM4)