Catalina 10.15.1 auto reset problem

Yesterday, I play game Dota Underlords and my hackintosh auto reset.

I think it is a graphic problem but today when I uninstall a App using CleanMyMac, it happen again.

I not happen to me before.

This is what I done recently:

1. I build a PC for my friend, so I pull off my power cable from my PC to test the new one
2. After that, about 1 day with no power connect, my PC boot too slow. It draw every single character in screen very slow. Like the refresh rate of screen is 2-3 fps
3. I research about this and change DisplayPort to HDMI and it work now. Have a problem with the DisplayPort Pin 20.
4. And then now I have reset problem

Here is my spec:

- Cpu: i5 8400

- Astrock MOBO

- GPU AMD RX 570

And I'm using Vanilla method.

Thank you for any advise!

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p/s: sorry because of my English