I had this with the same monitors, adapters and 1x 7950.
I think it was when I tried the 12.4/5 preview drivers. So I rolled back to 12.3.
I'm now on 12.4 WHQL ones and haven't had the tearing/flickering problem since.
It's odd because it goes away and comes back as it please. Treats my computer like a flaming hotel!!!
I am back on 12.4 officials now but still have the problem. Not in game though which is just odd...
