XFX Rx580 - 1.277 GH
Sapphire Rx580 - 1.283 GH
Sapphire RX5700 xt - 728 MH
Sapphire RX5700 xt - 863 MH
MSI rx590 - 622 MH
trying to figure out what the difference is, these are the same clocks i use for ETH, using TON_Stratum_Miner_HiveOS (c) v.2.1.0
I have no idea how you got to 1.2gh on a rx580, maximum I got with a rx580 was 900 mh, well core was low at 1200mhz, did not try 1450mhs but even if got as high as 1450mhs that 1.2gh would also be impossible in my calculations.