Ill try to help.
I have same cpu (i think) and same motherboard for sure. My problem that fixed at least posting was as follows...one memory channel on my board is dead, It is a process of elimation. Stay calm work through the issue. Mine was broken for 5+ years. Im happy to report mine is working on one memory channel and i was able to install OS. I hope the best for you and i will monitor this thread because you are working the same board/issue that I am.
Best wishes.
--cmdr