My pc keeps crashing when playing demanding games

[wrecking.faces]

Specs: CPU: AMD Ryzen 5 1600
Ram: 8GB
GPU: Geforce GTX 1050 Ti (4GB)
Power Supply: Corsair VS 2014 Series Power Supply - 650 Watt

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At first I thought it was overheating because I was overclocking on a stock cpu fan so I downclocked everything to it's normal state. Then I bought a new cpu fan because my pc kept crashing. I haven't overclocked since then and it's still crashing when I play demanding games such as COD BO4 (beta), Assassin's Creed Origins, Ghost recon wildlands etc...For some reason it doesn't usually crash mid-game, only in the transition from the menu to the loading screen or vise versa. I don't know what else to do. Should I raise my GPU fan speed or anything else?

 

[animemangamer]

I assume you did some manual overclocking. You can try reseting CMOS or BIOS by using the default setting option. That will put your clocks, voltages, etc back to stock/default.

 

[wrecking.faces]

I assume you did some manual overclocking. You can try reseting CMOS or BIOS by using the default setting option. That will put your clocks, voltages, etc back to stock/default.

I did, everything is on it's defeault regarding the GPU

 

[hang-the-9]

Did you check temps in the system? Does it only crash in games? Can you test with another video card? Try a clean Windows setup with new driver setup?

 

[wrecking.faces]

Did you check temps in the system? Does it only crash in games? Can you test with another video card? Try a clean Windows setup with new driver setup?

I can't try out another gpu at the moment but yes, it only crashes when playing demanding games to be exact. Cod waw, Gta SA for example have never crashed on me even when playing for a long time.
I am thinking of getting a 1060 or probably a 1070 (geforce gtx) soon, but I am not sure if the graphics card is the problem. Could my PSU be causing the crashes?