Stopped using power play tables?
Do the 18+ drivers allow you to change voltage on lower P states? As far as i know i've been using the power play tables and overdriventool to keep the power consumption down. Not needing the power play tables is new to me.
Yeh, I've seen this posted a few places about not needing PPT anymore. So if I delete that reg key there's no impact? I don't get that.
I stopped using power play tables since 18+ drivers. overdriventool is enough to achieve full hashrate at 165W with vega 64 and modified vega 56.
clock: set to 1600, voltage set to 850mV
mem: set to 1100, voltage set to 860mV
real clock is 1400 to 1500 depending of the card ; real voltage: 885 mV; shown in GPUZ.
4 cards rig is at 700W, system uses roughly 35W
What is your modified 56? Did you flash the bios to 64? Love to see your OverdriveNT settings for the 56.