Recently I've build a computer for both personal use and mining purposes. I've installed the latest driver for the graphics card, also other drivers for my motherboard which is Asus ROG Strix X370-F Gaming. I'm using Ryzen 1700 and 8GB 3000 Mhz (running on 2400) HyperX RAM. GPU has a Hynix memory. My settings are below, but somehow I'm getting really bad hashrates. Can someone help me to figure out this problem? I made some research about this graphics card but it seems I've the lowest hashrate. If i hit "+" button in Claymore miner for 30 dcri I get 17.5 Mh/s for 100 dcri I  get 19 Mh/s. I don't want to flash the BIOS (I think there must be another problem at least I should see 22+ and I would be happy with it). So what can cause this problem except not flashing the BIOS. As far as I can see, similar and even low profile cards in stock mode are getting better results.

My Claymore bat file is this:

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -ewal MyAdressWasHere.RessaX -epsw x
https://ibb.co/czRvHG