v9.0 is available:

- Improved speed by 5-15%, depends on card:
   About 810 h/s on stock 290X (Hynix memory).
   About 710 h/s on stock 290X (Elpida memory).
   About 690 h/s on stock 290  (Elpida memory).
   About 550 h/s on stock 280X (Hynix memory).
   About 440 h/s on stock 270X (Elpida memory).
   About 410 h/s on stock 270  (Elpida memory).  
- Reduced dev fee, now it is 2.5%.
- Improved "-li" option, Windows freezes even less.
- Best "-a" and "-h" values are set automatically for 290X,290,280X,270X,270,6950_2GB cards.

Note: For cards that are not in this list you need to check different "-a" and "-h" values to get max speed.