flip psu switch off and on: doesn't work
swap power cables with old psu to all but the drives: works
swap power cables back to new psu to all but drives and gpu: works
continue adding power cables from new psu to drives and gpu: doesn't work
remove power cables from all but mobo and cpu again: still doesn't work
🙃 computers.
everything plugged back in, beeps fine, drives seek, left it running for a while without incidents
so the new psu is a bust i guess?
do i trust the old one?