If you start your miner using start.bat, then add -dcri 21 at the end of the file.
OR you can adjust it on the fly by hitting the + / - keys.
Easier that way that having to close the miner each time and then edit the start.bat file.
Once you got it tweaked then can edit the start file once and forget about it.
OP: try -dcri 1 and check your hashrate ~23 is good on eth.