Steam user Kaldaien has shared a small utility that enables players to tweak the ini file for Batman Arkham Knight. The file can be downloaded from here. The game must be installed before running the tweak. The tool is dependant on individual hardware so experimenting with different settings is ideal to get the best possible experience.

　　Warner Bros. announced that the next patch for the PC version of Batman Arkham Knight will release this August. The update is said to improve overall performance and frame-rate hitches, and will enable support of frame-rates above 30FPS in the graphics settings menu.

　　Warner Bros. reports that they will provide more details over the coming weeks. They have recently listed the key areas that they are focusing on for improving performance:

　　Support for frame rates above 30FPS in the graphics settings menuFix for low resolution texture bugImprove overall performance and framerate hitchesAdd more options to the graphics settings menuImprovements to hard drive streaming and hitchesAddress full screen rendering bug on gaming laptopsImprovements to system memory and VRAM usageNVIDIA SLI bug fixesEnabling AMD CrossfireNVIDIA and AMD updated driversBatman Arkham Knight is available on the PS4, Xbox One and PC. We will bring you any new information as soon as it become available.

　　source