Maybe try the 'Windows startup repair' on boot it may fix the issue.
Some more info here. Or reformat the unit with an old HD?
Well apparently the fact everything went to s**t was pure chance. I reinstalled with IDE settings & still the same issue when I try to install the drivers, which fail miserably. I will try to flash the bios later.
Flash the 1st bios with the 2nd bios (dual bios gpu), because it is way too hard to find the correct bios due to the naming scheme of Sapphire (35 different radeon HD 7950... really Sapphire). Then I installed the driver (not the latest, one from December 2015) and it did not reboot properly. And this time, since I used the same bios as the 2nd bios i could not just switch between the two to log in. So back to plugging the VGA port on the motherboard. HOWEVER after using the latest version of
Display Driver Uninstaller I was able to boot on the graphics card.
Atleast I know the problem was not a corrupted bios BUT Amd drivers (regardless of which one) seems to interact badly with something. My guess, either the motherboard BIOS or the PSU.
More testing required.... F****** week.