So Phil is going out on a limb and is sending me his replacement PSU to determine whether or not my PSU is damaged. This is a very generous gesture from him and ill do whatever is necessary to make sure he is made whole when this is settled.

I'm quite convinced its the PSU given the events that precipitated the reduction of hash rate, namely the pop, flash of sparks, and puff of smoke from the PSU. Combined with the stated specs for the PSU (below), I'm struggling to believe that the input voltage difference between 208V and 220V is what is hamstring the hash rate. I will add that the autotune function is not raising the avg board freq to what it was prior the PSU incident. Current board freq: 445-499-434 resulting in 28.5TH/s. I can only hope the boards were not damaged.

Model:
P10-12.5-2250-V1
Input:
176-264VAC 50/60Hz 25A Max
Output:
12.5V 180A
12V 10A