Benchzowner did some volt readings on the P5K3 Deluxe, I think it should reflect to the P5K deluxe.

here are his findings:

BIOS Set to | BIOS Shows | Real Idle | Real Load
1.35V | 1.336Vs | 1.333Vs | 1.335V & 1.336V |
1.40V | 1.384Vs | 1.383Vs | 1.384V & 1.385V & 1.386V |
1.45V | 1.432V & 1.440V | 1.435V & 1.436V | 1.435V & 1.436V

BIOS Set | | Real Voltage |
1.80V | 1.867V
1.85V | 1.920V & 1.921V
1.90V | 1.953V & 1.954V

As u can see, is that the real volts are pretty close to what the bios shows( cpu-z). And that it is a sure thing the board is overvolting the Dimms
Not sure that is the case.

After reading this and also reports of the P5K deluxe killing ram, I needed to check for myself.

I don't know how accurate my readings are, but with a mm my readings are.

Bios Set | Real Bios | Real OS
2.25 | 2.23 | 2.23
2.1 | 2.1 | 2.1

Obviously not all P5K deluxes are going to be the same, but these readings are somewhat re-assuring. For me anyway

RLM