WOOT, 12.11 beta is out, you should expect 20% performance increase O-O *starts downoading immitdiatly*
That's a 20% performance increase in some games. That has no bearing on mining performance, and in my experience, 12.11 is a buggy mess and worse than 12.8 for mining speed and causes crashes and video artifacts.
What kind of buggy-ness have you found?
Well, here's a bit of background, I have a Sapphire 7970 that powers 3 23" LCD's and was running catalyst 12.8. I ran cgminer (2.8.1 and then 2.8.5) in one of two modes, full bore or lightweight. Fullbore would run at intensity 9 with 1070/950 clock speeds for about 650 Mh/s and I'd use that when I was doing basic stuff on the PC like web/email. The lightweight config ran with intensity 5 and clocks of 1000/1450 and I'd use it if I wanted to play a game. Speeds I'd see would vary from 100-400 Mh/s depending on how much the game was stressing the GPU at the time. I was able to run the lightweight miner and play games like Arma 2, Company of Heroes or Mechwarrior Online without a problem and other than the drop in hash rate while I was gaming, I had no issues.
Once I moved to 12.10 (I skipped 12.9) that all went out the window. Both those configs would work fine, but probably ran about 5% slower with speeds around 620-630 MH. If I tried to run any games with the lightweight config, after about 5 minutes the video driver would crash and kill both cgminer and the game. I even tried setting intensity to 1 or to dynamic and it still crashed if I tried to game.
The 12.11 beta was even worse. Not only did it drop my speeds even more (there were times I was seeing 300 MH/s even with my 'fullbore' settings), but it basically would throw all sorts of graphical artifacts on my screens. I also saw for the first time in 6 months an error message pop up in CGminer that my card wasn't responding and it was set to DEAD. I didn't even try any games and just rolled back to 12.8.
