I'h having a poor performance issue as well. I'm on 12.11 beta and have sdk 2.5 installed. When I run CGminer it doesnt even see my 6950. When I run gui miner it seems like there is some sort of speed limiter.. I can hit 400MHs, 450MHs but then no matter what I use it goes back to 350MHs. I have tried 13.1, 12.10 and, 12.11 beta as well as sdk 2.8 and 2.5. I also have a GTX 480 installed if that helps. Any ideas? I'm loosing out on quite a bit
![Sad](https://bitcointalk.org/Smileys/default/sad.gif)
I am actually about to buy a 6950 on ebay.. Will the 1gig gigabyte model be able to get 450? or will I have to settle for 350?
sry to post on such an old thread but I figure it's relevant cause I don't really even have the money to be buying a 6950 let alone the 200 - 7950's I would love to have!!! So I want to know and haven't been able to find a difference in kh/s between the 1gb and 2gb cards except for in games.. are you guys using 1 or 2 gig cards.. if you're still using 6950's?