As for clock speeds and voltages. I agree, mostly. I mean Wattman and HWMonitor both claim the clock speed is 1000mhz when I am hashing at 1900H. Although I appreciate both could be wrong. Perhaps that is why I feel my power draw is to high. 1450W with the settings I previously linked, 300W idle, means roughly 191W per card, definitely to high.
So any tips for checking the actual speeds?
Did you compare wattage and speed running default (except for the mem speed, make it also 1025mhz to equalize with second setup) and your "downvolt" setup? Did you see wattage decrease applying core clock 1000 and core voltage 950?