FYI, I completed an evaluation between win10 driver 18.6.1 vs 19.4.2. Found no hashrate/power draw difference with TRM 0.4.4 miner. Evaluated on CNR algo only.
Using a PPT mod will also shave off 15W per card with either drivers. So use PPT if possible even with 19.4.2 drivers.
I can't seem to apply PPT on Sapphire Vega56 Nitro+ Limited Edition. Does anyone know how to do this? Or should I just flash it to normal Nitro+ vBios?