All RX 580 4GB hits terrible results in my rig

[streng]

Hi,

I have a question, I Just bought 3x RX580 4GB and my hash rates for ETH is low. I can’t get more than 19MHS at stock settings. These cards are from deafferents manufacturers (Asus Strix elpida memory, Saphire Pulse elpida memory and XFX GTS hynix memory). I try every card insert to rig alone, but without difference to hashrate. Also my hashrate is slightingly lower when I use solo ETH mining. When i use dual mining with pasc then i get approx. +1MHS. I don’t understand why all cards achieve these low result and don’t understand why dual mining provide better result than solo?
I using driver 17.11.1 and the latest version of Claymore. I also tried different drivers , but without any affect to MHS. I try also AMD mining beta driver, but after that claymore crashes immediately.
So, my question is what doing wrong?
When I use other cards like RX560 to the same rig, they had 11Mhs and when I try 1060 GTX they had around 20mhs at stock. These results are ok, but don’t understand why all RX580 achieve these terrible results.

Thanks for advice.

(And yes i using DDU when reinstalling drivers)

[baga105]

Try usind the blockchain drivers dude You should hit arroudn 22.5-24 Mh/s with stock settings with those cards.

[streng]

When I used blockchain drivers, then claymore miner stop working for me. There is a issue when is unable to mine on Windows 7 witch claymore and blockchain drivers.
Today i try to insert these card to wnidows 10 machine and will se result, but i still think this should be worked on win7 too ...

[Vann]

The AMD blockchain drivers have issues in Windows 7. You can try the Robinhood blockchain driver

https://bitcointalk.org/index.php?topic=2068446.0

[streng]

where i can download robinhood blockchanin driver ? I try to google it but without succeed

[Vann]

Fixed link.

https://bitcointalk.org/index.php?topic=2068446.0