|did you try putting your original CPUs back in the original motherboards? you may have already damaged components, but if you're lucky you can undo all your changes and have 2 working computers again.|
i'm not convinced your CPUs are all compatible. there's some pretty flawed logic in your statement:
"since i already had an AMD, I knew my system supported it"
AMD, like intel, has gone through a bunch of socket type changes over the years. one of you could have a 939, while the other has a 940, for example. i wouldn't be able to put my old 478 intel into my current LGA 775 socket, either.