A few years back I bought a few "broken" computer PSU's, and I mapped out them, in full, as best I could in LTspice. And I learned a pile of EE from that. I fixed a few, and still have few I need to teardown, and a few others I need to put back together.
Money-wise there's no point to sell them really, output re-capping, is the only way I'd trust any of them if I was to sell them (most read ok but they are 10yop caps by now for sure) , and I don't have a 1500W load tester, nor do I want to use my gaming PC as the test load.....so
But just watching the video of Gamer's Nexus blowing up more Gigabyte PSU's, I can make out the basic layout of the PCB from the other videos, and I wish they'd send me a fried unit to make a schematic's
It blows up just after 17min utube length
In my experience with the PFC/BOOST IC's I have seen, I have not seen a max power limit as such, but separate OV and OC limits. But maybe it's built into their op-amps as-well, IDK, yet. Maybe in some of the DC-DC converter chips, 12 down to 5V, some of them they internally calculate power, IDK. So again I'd love to teardown 1 of these.