v6.0:
- improved speed by about 20-25% (depends on card model). About 180H/s on stock 390.
- "-i" parameter values are 0...4 now, default value is "-i 4".
- fixed issue with mixed cards.
R9 270 - 73 H/s minus 2.5% devfee. Optiminer still better, 86 H/s without devfee.