Ok hold on...I disassembled the unit, and reseated the 6 heatsink screws, and all seems to be ok.
The two vregs came back to full power.
Don't ask me why since they don't ground or somehow function other than to hold the board to the heatsink...but it seems to be better and hashing at 4.5th now.
I don't like fixes that don't have a measurable value, or reason why, but its working again.
I also found a similar problem! When installing the large heat sink, it will be very close to the three capacitors, so I used high-temperature insulating tape to separate them before locking them.