I just overvolted my Northbridge on a Gigabyte MA790GP-UD4H board for to attempt to breath some New life into an old Phenom II X3 720 Black Edition that I never bothered to OC yet. I attempted set the clock multiplier to x18 for the CPU. I also adjusted the multiplier for the Northbridge as well as the voltage. The default VCore voltage is 1.325 volts. I tried +0.050 or + 0.075 volts more and it was not stable, so I bumped it up another 0.025 volts, and now I do not get display to my graphics card. I am unable to go into the BIOS and read settings or change them now. My motherboard does have a Dual-Bios, so I might be able to copy over the default settings on the second BIOS and get it back. My PSU, and fans still come up, and when I put an Ubuntu DVD in the drive, I hear the drive trying to read the DVD I think. But in worst case scenario, I may have fried something :-(. What do you guys think?