guys! i recently got a rx550, 2gb. Any idea if i can get more than 300h/s on cn-heavy? 
No, 2Gb too small amount to have normal speed on cn-heavy. You can increase speed only by use overclocking and editing memory straps in bios.Yeah! I know, i have the bios modded and tried some different configurations of OC without luck...
Maybe someone had good ones
Thanks man!