Low Mh/s on a Gigabyte Rx 570 4GB

Hi all,

So Im currently just starting out on mining so learning as I go. Have a Saphire Rx 470 Mining edition giving me around 13.5MH/s and I have just installed my Gigabyte Rx 570 4GB. However, the second card is only giving me 8Mh/S despite flashing the bios via Polaris with "Good Hynix Mining timings to 1500+".

I have installed the latest drivers and the AMD blockchain drivers but still nothing ?

AMD software and my Amd-compute-switcher.exe also say the cards are both in compute mode.

Currently running kawpow teamredminer with Nanopool . Any help is greatly appreciated !