1. Download ATIWinflash here:
https://www.techpowerup.com/download/ati-winflash/
2. Create a Backup of your high power BIOS (switch in standard position towards face plate).
3. Download the Vega 64 BIOS (use non liquid) here:
https://www.techpowerup.com/vgabios...X+Vega+64&interface=&memType=&memSize=&since=
The one you want is the one WITHOUT _1.rom at the end. Check the details and you will see the one without underline1 has the higher power draw, i.e. is the non power saving BIOS.
4. Flash that ROM with ATIWinflash
5. Reboot your PC.
Check with the newest beta build of HWinfo if your memory voltage now shows 1.35V.
You've done it!
Note: You can't flash the secondary BIOS, it is protected.