: The game lacks native triple buffering, which causes the frame rate to tank if it drops even slightly below 60 FPS. Use D3DOverrider or the NVIDIA Control Panel to force Triple Buffering and VSync on.
Running Assassin's Creed IV: Black Flag at a resolution of (a 16:10 aspect ratio) often presents unique challenges, as the game is natively built for 16:9 displays. This can result in permanent black bars or scaling issues. 1440x900 Thoughts: Assassin's Creed 4 – Black F...
: Right-click the game’s executable ( AC4BFSP.exe ), go to Properties > Compatibility , and check "Override high DPI scaling behavior" to ensure the application handles scaling correctly. Performance Optimization Settings : The game lacks native triple buffering, which
: Disable this entirely unless you have a high-end NVIDIA card, as it is a primary cause of stuttering. Fixing the 60 FPS Cap and Stutter This can result in permanent black bars or scaling issues
For a visual walkthrough on how to further boost your frame rates and fix persistent lag in Black Flag, check out this guide:
Because the game natively supports 16:9, users on 16:10 monitors like yours frequently encounter letterboxing.
: Some users report that setting VSync "On" in-game, then Alt-Tabbing out and back in, forces the game to refresh its frame rate logic and smooth out performance.