livada lucky you... I've tried different variants again - hashrate is still lower on that 1-1.5% 
even updated 18.4.1 drivers to 18.6.1 - no effect
what drivers do you use?
even updated 18.4.1 drivers to 18.6.1 - no effect
what drivers do you use?
+ I finally bought a Vega 56 card, so in the next releases i will try to improve the performance for Vegas.
Is there a chance you will make BIOS editor for Vegas? ;-)