-dcri Decred intensity/Siacoin. Default value is 30, you can adjust this value to get the best Decred/Siacoin mining speed without reducing Ethereum mining speed.
You can also specify values for every card, for example "-dcri 30,100,50".
You can change the intensity in runtime with "+" and "-" keys and check current statistics with "s" key.
For example, by default (-dcri 30) 390 card shows 29MH/s for Ethereum and 440MH/s for Decred. Setting -dcri 70 causes 24MH/s for Ethereum and 850MH/s for Decred.
-ethi Ethereum intensity. Default value is 8, you can decrease this value if you don't want Windows to freeze or if you have problems with stability. The most low GPU load is "-ethi 0".