Okay, I have a M4A89TD pro USB3 motherboard / asus bios. Do you know much about these?
First thing's first: drop the multiplier to as low as it can go. Unlock the base clock. Raise the base clock to, say, 5 above default. Set the voltage down to its default. Ignore the CPU speed atm, we are testing to see what kind of base clock you can get up to.
Test this. If you pass, raise the base clock again. Keep doing it until you crash. Make note on paper of what your highest base clock was.
Get back to us and we'll see what we can do!