Rig with 588+7*Vega56 works well on 1.6.8, HR~14000
after update to 1.6.9 hashrate ~13900, and its not stable.
1.6.9 faster on Vega56 & Vega64 then 1.6.8
Vega56 ref
1.6.8 auto Intensity = 120
1.6.9 auto Intensity = 112, HR little bit slowly, may be the same after tuning "fragments"...