GPUs are often the easiest to recover actually – boot with another GPU, keeping the screwed-up one plugged in – it will still be flashable, just run atiflash or whatever.

Also, high end "gamer" hardware often includes "dual BIOS" (on both mainboards and graphics cards) and/or "BIOS flashback" (special button makes a microcontroller flash an image from a USB stick inserted into a marked port, even without a CPU present).