So I was getting 27MH with my RX480. I just replaced it with a new RX580 and now my hashrate is only 21MH and won't go higher. This is using the same driver version and version of the miner (9.3), I have already attempted a clean driver reinstall with no luck. This hurts me seeing a newer and faster polaris card running quite a bit slower, it doesn't make sense. Any suggestions for why this might be?