Whats happening with the RX 550 2GB with the 1.7.0 version?

When i run benchmark mode the hashrate is 465 (lower than the previous 490), but when i run the miner it drops to 365 h/s. Algo is normalv8. The RX 570 perform better than before, the RX 460 are at the same level.

Doctor, do you have RX 550 cards to test this?