Sounds like the same issue I'm having. Same card and driver.

I've looked around the net and found similar problem with ARMA games. It seems to happen on Nvidia cards as well. The workaround posted here...

http://feedback.arma3.com/view.php?id=618#c16179

...seems to help a bit (yes, you have to override the in-game AA settings). But it's still there if you look really closely.

Any ways, I've attached an example screenshot to the report. Look at the tree beyond the bridge and the grass on the top of the hill, to the right of my character.

So I think I may have found a fix for AMD users. Just override the game's AA settings with these in CCC and it seems to fix the problem for the most part.

http://i.imgur.com/utZJBWW.png

And since you're overriding the game, just set the in-game AA setting to Low so you can still use ATOC (otherwise what's the point?) Also make sure that you're not using SMAA or FXAA under Edge Smoothing, since you'll be using AMD's MLAA instead. Although, I think their current implementation (MLAA v2.0) only works with 7000 series cards and above. So it might not look as good for older card owners.

Edit: I uploaded an example screenshot here since imgur kept trying to compress it which caused it to look like ass.