: 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
For a visual walkthrough on how to further boost your frame rates and fix persistent lag in Black Flag, check out this guide: 1440x900 Thoughts: Assassin's Creed 4 – Black F...
: Set this to "High" rather than "Soft Shadows." Soft shadows are significantly more demanding (up to a 29% FPS drop) for a negligible visual difference. : Right-click the game’s executable ( AC4BFSP