Hi guys, I have some  r9 290 4GB, some  rx 580 4gb gpus and yesterday they stopped mining eth so I decided to give lolminer zombie mode a try. I managed to make it work but the hashrates are very low. The r9 290's previously were mining at 29-30mh/s and now at 19-20mh/s, also the rx580's is mining at 22mh/s . Is there any specific parameter I have to change to raise more the mh/s?