A 3-phase VRM is not ready for a 125W TDP quad core Phenom II. These VRM systems were in use back in the Socket AM2 days when the most cores a processor had was two. They were fine perhaps for 89-125W TDP dual core Athlon x2 64s, but underneath TDP, the actual power load of a quad core processor is much more intensive. A quad core Phenom II or higher requires a split power phase for most optimal functioning, and 4+1 phase with ensured VRM cooling for safe and reliable operation.
I would simply say no. There's a reason that the majority of 125W TDP Phenom II processors are not on the Cpu support list. Get a new board if you wish to unlock to 4 cores.
The similar ASRock N68 series had reliability problems attempting to run quad core processors, at least a few users reported. It is protected with a VRM OCP function. I'm not sure about this board.
It is time for a new board. Look for a quality 4+1 phase VRM with VRM cooling.