v3.0:
- improved speed by 20-30% (depends on card model). Up to 80H/s on stock 390X on "-i 2" mode.
PS. For those haters who think that I'm a thief and steal someone's code: don't use my miners, my efforts are not for you!
YEAH!

280x 55-60 h/s
390 74-80 h/s
290x 75-81 h/s
rx 480 59-61.x h/s
fury up to 86.x h/s
rx 480 seems to beat 280x now..