- Yup. I installed macOS already with rx580 which works and I could check my rx580
- But my rx580 has glitch and freeze(randomly) problem like this
(I tested only one monitor each time.)
- rx580 and new rx5700xt works in windows10 without problem.
- My monitor is LG 34UC80-B(
https://www.lg.com/us/monitors/lg-34UC80-B-ultrawide-monitor)
I think someone has cursed me

I heard most of your EFI was successful without any problems.
Update
With rx580, all installing process works. I'll try changing gpu from rx580 to rx5700xt again!