Probably should have clarified, I am using two 'passive' DP to DVI adapters for two of my monitors, and one active DP to DVI adapter (my understanding was this was required for eyefinity). Is this not the way I should be connecting my screens to prevent tearing?
I have tried running one of my screens through the 'switched' dual link DVI port (as it is a 120hz monitor, and my active adapter apparently isn't up to the task of that - even though it can do 2560x1600), and I get identical tearing in eyefinity (but none with extended desktop).
You need to run all active adapters. When you go into CCC, go under desktop management, then creating and arranging desktops. Hover over the monitor icons. If any of them say DVI, you need active adapters.



