Just installed a GTX 760 2G in my machine replacing the AMD 6770 1G.
The graphics are bloody incredible at 4096 with enough memory and band width now to run it.....
Interesting note on frame rates. Flat terrains with massive amounts of trees effect the FPS very little. Once you have elevations above 2k with complex texture tiles and thick trees, my FPS would take a hit holding 32-47 and even 22 from the CV guns looking inland. The same thick trees on a flat terrain were no problem. This also took place with GV's. On the flat tree terrain running through the trees at 40mph with clutter on, 60fps.
I tested this on all of the online terrains, online and offline along with my gunnery terrain. My gunnery terrain and NDilses both have elevations above 2k with massive tree coverage and complex tiles on the slopes and peaks. Only those two terrain caused the loss in FPS with my new card. The AvA North Africa terrain with 1200ft hills with some trees and sand did not trigger this condition.
I also tested this condition against all the maps in 1024, 2048, and 4096 with the same results. I did note that 1024 and 2048 modes caused a slight reduction in FPS otherwise. For some reason 4098 mode runs the cleanest with this new video card.