The game engine is natively hard-capped at approximately 63 FPS. To go higher, you must use a community patch.
There is also an "AC4 FPS Unlocker" mod, but the 240 FPS Patch is generally regarded as the most comprehensive and stable fix available.
For NVIDIA users, a simple and effective solution is to use the driver-level FPS limiter. As noted in a community video guide, the game can run stably up to around 80 FPS, but above that, frametime consistency can become a major issue. Setting a cap of 76-81 FPS is often the sweet spot.
While unlocking the frame rate past 60 FPS (e.g., playing at 144 FPS) makes Edward Kenway's movements incredibly fluid, the AnvilNext engine calculations are inherently tied to the tick rate of the framerate. assassin 39-s creed black flag 60 fps unlock
Method 1: The Quick Fix (Disable In-Game VSync & Force Triple Buffering)
The AnvilNext engine handles physics calculations based on frame timing. If you unlock the framerate beyond 60 FPS, you might experience floating ships, erratic water physics, or broken cloth animations. If you notice these glitches, use your GPU software to hard-cap the framerate at exactly . Recommended In-Game Settings for Modern PCs
To fix the issue, it helps to understand why it happens. Black Flag utilizes an older iteration of the AnvilNext engine. The game's built-in Vertical Synchronization (VSync) setting uses a "double-buffered" technique. The game engine is natively hard-capped at approximately
: Use a tool like D3DOverrider to force Triple Buffering, which prevents the 60-to-30 FPS drop common in this engine. Method 2: Unlocking Beyond 60 FPS (Mods)
This is the cleanest and most stable method. It uses your graphics card driver to manage frame synchronization, bypassing the game's broken internal double-buffering. For NVIDIA Users
With the 60 FPS cap shattered and stuttering resolved, you can finally set sail on the high seas and experience Edward Kenway's iconic adventure as it was always meant to be played—at a silky-smooth framerate worthy of your modern PC hardware. For NVIDIA users, a simple and effective solution
Your path to 60 FPS depends on your platform and preferences:
Click on the Black Flag icon resting on your Windows taskbar to maximize the window again.
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