Quote from: vince212 on June 09, 2017, 06:26:00 AM

Right now im mining with 3x xfx rx 570 4gb and a powercolor rx 570. But when i tried adding a 580 8gb. System reads all 5 cards but only 2 are working. Tried gen1 lane. Tried rearranging the cards. My mobo is asrock b250 fatality gaming k4. Can any one help me here?

Try reinstall drivers.

Quote from: TFZ02 on June 09, 2017, 08:41:30 AM

is there an big different between the rx570 4gb and the rx570 8gb?

No.

Quote from: btcemo on June 09, 2017, 06:19:05 AM

I get 29 MH/s per card but does anyone achieved 30MH/s?

I do. 31MH/s unstable, 30+ stable with RX 470 Strix - Samsung.