I used to be able to get 60 fps most of the time on ultra settings , dips down to 50+ and 40+ occasionally but after the new patch i seem to have noticed that my average fps is now 40+, anyone else having this issue ? I am running on an Asus Gtx 770 and 331.65 drivers.
I have a 670 and ever since I disabled dx11 I can play at otherwise all max settings with no noticable framerate loss. I think overclocking the card a small 100mhz helps too. http://battlefield.realmware.co.uk/bf4-settings-editor/downloads
I’m having this aswell, i run on a GTX 660 and play on high, had around 60-70 frames. Now i get 40-60 
Don’t know if it’s Nvidia but I’ve seen my FPS increase…
Witnessing the same thing. 30fps drop with an Nvidia GTX690