Once again, thanks buddy
Everything works out, except I can't see, identify the letters (or numbers?) on that Q507 component, a transistor by the looks of it. Can you tell me what they are, no need for additional pics, just write them down, if you can see them.
@Chloe Price Me too! Again, it's not mine (I wish it was lol), but if anyone can bring that FX5900 back to life, it's that guy

Unfortunately one (or several) SMD components got chipped off, so he's on a lookout for reference values, to match & patch up the non-working card. Or at least that's the plan.