I used the newer version of
ATIflash and ASUS VEGA 64 BIOS. I attached it for you here.
Do you have an AREZ Vega 56? Make sure you have the same memory, if not, you'll brick your card. The card must have Samsung memory. If you have Hynix this won't work.
Backup original BIOS and do
EVERYTHING AT YOUR OWN RISK.
View attachment 132724
With the original BIOS, the card was able to go 1590/900, now I can get 1650/1100 (I am using 1590/1080 because of Dying Light stability issues, everything else works fine). GPU is undervolted by 50 mV.