Volkux_

If you have a Linux usb try to see if it shows up when running GPART it may just not hopefully be detected by windows if it doesn't show up in GPARTED then it is a dead drive. You can follow this guide: How to Use GParted: 9 Steps (with Pictures) - wikiHow

I would recommend you follow this tutorial it is a little advanced but once you do it you don't need to do it again and I made my first Ryzentosh following one of his older guides. NOTE: I had a AMD GPU NVIDIA IS HARDER ON MACOS!!!! I attached the one I followed it is outdated keep that in mind. Top (Most recent one for Ryzentosh) Bottom (The one I followed)

Well..... I'm going to assume you tried unplugging the power supply cables from the motherboard and plugging it back in. So the last thing I can think is either the motherboard or overvolt protection is being tripped. I'm sorry if I didn't help at all I just gave you the ideas I thought of.

I'm not sure if this answer is right. Still, I think his system is a less power efficient system because of it being 1st gen RYZEN, so the lower wattage is not giving it enough power to post. Yours being higher wattage has no issue running it. Personally, if I were you and have $85USD to spend I would go to your nearest microcenter and buy their 750W PowerSpec Power Supply. You could also buy the same power supply you use and that if you want to.

I personally would recommend Ubuntu LTS (20.04) with either KDE, DDE, or GNOME as the desktop environment. I like DDE but it can be unstable. If you just want a rock solid then I say go with GNOME.