EDIT: ended up being 1 faulty ram stick, 1 (supposedly) bad psu, an overcooked cpu, a dead aio cooler and (potentially) a faulty psu. Thanks Linux bros.
I did the memtest. Figured out 1 out of 4 ram sticks are bad and sent it out on an RMA. Took the whole rig to a local shop and he load tested the PSU. It failed twice. He recommended I replace the PSU then the motherboard if I still had issues. So I replaced the PSU with a new unit, still the exact same issues. So I replaced the motherboard with a used one. Still the exact same issues. I updated the BIOS. Same issues but a new, more red Asus logo (yay).
I still cannot, for the love of AntiChrist, boot the thing. At. All. Not even from a usb. Attempting to fresh install windows and i have zero input from any devices.
I am at my wits end and I need my PC back up and running.
Linux bros blocked immediately.
-- Clear cmos. -- Load fail safe settings in bios if you are able to. -- Unplug everything you don't need (like gfx card, if you got an onboard card+usb stuff (mouse etc), non system hdd, only use minimum of ram installed) .... still trouble? -- Download a live image to USB to check if that boots.
Done all that. Still the same. Zero input on any usb device if i ever get to the Windows installer. Linux installer just goes to a black screen for hours after selecting to install Linux.
Im thinking the cpu is faulty at this point. No clue how maybe im just unlucky.