Should I answer this thread or the other one you made? Why are you opening more threads than needed? Seems to me your other thread needs to know the info in this thread. I know you linked it, but others might not read this far enough down to know your in Uruguay. That's needed info for them over there. Pick ONE thread and use it. You aren't looking for just a GPU. You aren't looking for just a board. You need parts for your SYSTEM. Don't make a thread for every part you need. They all need to work together, so you need ONE thread for the system upgrades. All the info stays in it and we can help you best.
Again, I wouldn't bother buying a new board. That's money spent that won't get you a new board that can run a new CPU. And you need to be focused on buying a new setup. If what you have currently works, keep using it.