Testing JCE 33b5 on RX580 8GB cards (x8) with heavy using win 10 x64 with Adrenalin 18.6.1.
Similar findings as above, big issue with warm-up, only a few cards will hash at full speed, others just don't want to wake up

The speed seems better by about 5-10%, although the miner behaves the same as if you would set too much intensity, when you only get a few cards hashing at full speed.