Hey!
I already have a mining rig with 3 MSI RX480 4G running smoothly on EthOS at 27Mh each.
Coreclock: 1100 Memclock: 2200

Now i bought an Asrock BTC Mobo and ordered 2 more MSI RX480 4G. But they are running only at 21.5 Mh (stock).the other 3 cards were running with ~24Mh stock. Why is the hashrate so low?
The 2 new cards have hynix memory and the other 3 have samsung memory. Thought hynix is the better one... but only 21.5 MHs??? When i choose the same settings on the new cards (1100/2200) only one is mining with 23 Mhs and the other one with 0 Mhs...

Any solutions? (Tested with windows, same shitty hashrate)