Some results (ver 10.3 vs 10.5):

Radeon Vega 56: 0.7 CPD -> close to 0.8 CPD
Radeon Nano: 0.5 CPD -> close to 0.6 CPD
Radeon Rx 480: 0.4-0.42 CPD -> 0.43 CPD

Rx 480 doesn't give me 0.5 CPD, what sieve size and similar settings should I try to get there?