really? my 5600XTs and 2080 supers are still netting 200% profit a day compared to the cost of running them. and those are not the most efficient cards on the planet. i like when crypto 'crashes' so i can mine more of it in a shorter time because everyone else stops mining.
there are some guides on moving windows from BIOS to UEFI.
honestly, it sounds like you would be better off savings things you want to keep on to a USB drive, then setting the PC into UEFI boot and installing a clean windows...
the OCD in me would have put the ends of the zipties on the inside towards the heatsink. that should work nicely though, the older thermalrights are still very good, most hat a dissipation rating of at least 135w, the coppers were well north of that.