For reference, RX 470 and 480 running at 1150MHz core clock:
KECCAK:
-dcri 8, anything above that causes a major drop in ETH hashrate
RX 470 = 180MH/s
RX 480 = 200MH/s
BLAKE2S:
-dcri 50 with no drop on ETH
RX 470 = 1300MH/s
RX 480 = 1450MH/s
-dcri 60 with ~0.5MH/s drop on ETH
RX 470 = 1500MH/s
RX 480 = 1700MH/s
Well done @Claymore!
Have been testing the dual now for a few hours; eth on ethermine and Blake2s on Nicehash works fine. -dcri 50.
Experiencing this:
2x RX580 still at same ETH 30.6 stable (and 1530 Mh/s Blake2s) - no drop

But:
2x Vega56 flashed, eth drop of 2.5-3.0 mh/s (and 1900-2000 mh/s Blake2s)
2x Vega64, eth drop of 2.0-2.5 mh/s (and 2100 mh/s Blake2s)
Maybe I should try individual -dcri for my cards?
Any suggested settings for Vega cards?
Thanks!