MCH reference along with VTT and MCH voltages are probably the cause mate, I wouldn't give up just yet. The aforementioned are crucial to stability on this board, and could result in a bootable, but not 'stressable' system. You might even find that your old PSU required the board to give higher voltages, and you might need to compensate/re-tune.

List your settings and perhaps we can offer some more suggestions