Thanks for this. I've been playing with the power settings with a Sapphire RX Vega 64 Liquid Cooled and got 1990.7 H/s stable @ 0.875 VDDC. Couldn't get power draw at the wall because I need a kill-a-watt thing.
About 145W. More details in the next video this weekend.
Highly doubt if it is stable.
One of my cards needs 910mV voltage (gpu-z) to run 1408/1100 stable, other can handle 900mV. If yours is stable - you are the silicon lottery winner ))
It still running in the same session and I don't see any speed fluctuations, it seems stable. As a matter of fact the pool is reflecting my hashrate very well too. Try lowering the HBM voltage to the same voltage as Vega 56 version. I think this is what did the trick.
