I've got a HD 7770 1GB (4 Core 3.6GHz 8GB RAM) and I can run the game 'OK' on all-low settings at 40-70 FPS. But when I look at a far detailed area, like a ship, it drops to 20-30 FPS. Which isn't cool.
I know this is a early alpha release, but hopefully somethings done, I have a good enough GPU for Med-High 40-70 FPS. I can run BF4 perfectly fine at High on 100 FPS. Again this was a mod, and very unstable. But hopefully something is done.
Just reporting as many thing as I can find.