Corsair RMX Series, RM850x, 850... https://www.amazon.com/dp/B079H5WNXN?ref=ppx_pop_mob_ap_share

And

CRJ 24-Pin ATX Power Supply... https://www.amazon.com/dp/B01N8Q0TOE?ref=ppx_pop_mob_ap_share

Jumper allows the PSU to power on. Don't go over 80% of the rated supply wattage. 2 boxes on this PSU is fine. It is what I'm using.

DO NOT go cheap with a PSU. You get what you pay for in that dept.

Make sure the PSU is turned off, plug everything in first. Then turn on PSU.

Go-to find.goldshell.com to locate your new miner(s)

Upper right of the screen. Click the country flag and change language to English.

I don't believe ATX power supplies have to be a mod, do they? The Printrboard has an ATX 6 pin port right on it, so then all you need is the connection on the mainboard connector to make it think there's a board there. That can be a diy project, but you can also buy premade ones like this

Edit: I can spell, really.