The reg mod for the flashed vega 56 is causing gpu core to run at 1410mhz and even if I reduce it to 1210mhz it still draws 977w at load for 4 cards. Idle is about 130+w.
I'm using the common setup of g4400, 4 Gb ram.
Another thing is, i can't change the hbcc ram level at all. The slider is Greyed out and stays at 97xx mb.
You should check VDCC voltage, it should be bellow 0.9V. Out of 4 vega 56 cards on one card it stays at 1V while other are bellow 900mV for the same settings (Vega_64_Reg_GPU_0000-1100HBM.reg). It's just silicon lottery I guess. Tried this card alone and get the same result. I can make it go bellow 900mV, when using MorePowerVega64_142_Modded_fix.reg file but then I get about 200H/s less (around 1700) then other 3 cards (1900+).
4GB is not enough to activate HBCC. HBCC is not important, I disabled it. Just reset cards before starting miner.