Running 6 Vega56@64 @ 850 MHz @ 825mV (850mV for two weaker cards) on core_P7.
Getting approx 98 KH/s combined at 950W at the wall.
That's actually hilarious. This is pretty much roughly 150W per Vega. 103 h/W. L18+18.
L20+20 results in roughly the same figures. More interleave adjusts though.
L22+22 gives a whole bunch of interleave adjusts (all GPUs) and no improvements in hashrate from the values tested above... and ends up crashing after a while.
EDIT: @pbfarmer, I've not managed 18.3 kh/s as you seem to though. More like 16.5 at 850/1107. Using Core_P7 though, not sure that's what's making the difference?
6*vega56 nitro+(hynix) stock bios -
107800hr L28+28 (al card have diff mem and core) (mem 897-936mhz 880mv)(gpu 1450-1470 870mv)--
1040W at the wall (Rig have 6extra fan) TEM=56° - fan= 1900RPM
6*vega56 nitro+(hynix) stock bios -
109300hr L24+24 (al card have diff mem and core) (mem 897-936mhz 880mv)(gpu 1450-1470 870mv)--
1090W at the wall (Rig have 6extra fan) TEM=56° - fan= 2000RPM
800mv PPT table 1107SOC
Vega 56 ref(samsung) with 64bios - L24+24 best - 19500hr 1230/870mv-gpu and 1100/870mv mem - 120/127W in GPU-Z(temp=57° fan=3000pm)
this card go more up but my power is to low for 1400gpu
Vega 56 ref(samsung) with 64bios - L28+28 - 19250hr 1230/866mv-gpu and 1100/668mv mem - 112/122W in GPU-Z(temp=57° fan=2700pm)