Earlier i used 11.6 catalyst drivers. I got stable 440 MH/s mining speed from my OC'd 5870 with any combination of miners.
Today, after updating to 11.7 i noticed something strange.
While mining with single miner with AGGRESSION=12 i still get 440 MH/s, but if i'll add to that one more miner with AGGRESSION=6 the speed is starting to jump from 440 up to 550 MH/s.
Is that normal?
Did anybody else noticed that?
Is it really the speed changing or just inaccurate calculation?
PS: I'm using GUIMiner, with poenix miner and custom phatk kernel