For Eth-only, -dcri does nothing unless you are using -asm. From Claymore:

-dcri   Decred/Siacoin/Lbry/Pascal intensity, or Ethereum fine-tuning value in ETH-only ASM mode. Default value is 30, you can adjust this value to get the best Decred/Siacoin/Lbry 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.

-asm   (AMD cards only) enables assembler GPU kernels. In this mode some tuning is required even in ETH-only mode, use "-dcri" option or or "+/-" keys in runtime to set best speed.
   Currently ETH-LBRY mode is not supported in assembler.
   Specify "-asm 0" to disable this option. You can also specify values for every card, for example "-asm 0,1,0". Default value is "1".
   If ASM mode is enabled, miner must show "GPU #x: algorithm ASM" at startup.
   Check "FINE-TUNING" section below for additional notes.
   NEW: added alternative assembler kernels for Tonga and Polaris cards for ETH-only mode. Use them if you get best speed at "-dcri 1" (i.e. you cannot find speed peak), use "-asm 2" option to enable this mode.

Feel free to experiment. Results will vary.

You parameter [-dcri 5] is for dual mining. A ~1mh per GPU difference from windows to Linux is normal. Your hashrate is fine.

29.66mhs (ETH) per RX470 when dual mining is as good as it gets. What's your hash on eth only?

hey guys im using this amazing simpleminning but im trying to get most of my rig so needed an advice for overclocing for fulll hashrate

i own 6 Saphire RX 470 8gb hynix memory

i managed to get it 178hash but is there possibility for more without any issue ofc.

my settings are

core mhz: 1150
mem mhz: 2150

Core Unvervolting: 900

powerstage 6

-epsw x -tstop 75 -dcri 5

There can be multiple reasons.  what are temperatures on the card.  Check for memory errors using HWInfo64.  Hashrate drops for 1 particular card or the drop is spread across multiple cards?