How to Change Fallout 4 FPS Cap
To change your Fallout 4 FPS cap, you're gonna wanna dive into the game files a bit. First up, navigate to your Fallout 4 directory, usually found under Steam\steamapps\common\Fallout 4. Look for a file named Fallout4Prefs.ini and open it with Notepad. Scroll down or Ctrl+F to find 'iPresentInterval=1' and change that 1 to a 0. This disables VSync, which is what's capping your FPS. But beware, uncapping FPS in games like Fallout 4 might lead to some... interesting physics quirks because the game's engine ties physics to frame rate.
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If you've got an NVIDIA card, you can also use the NVIDIA Control Panel to manage the FPS for Fallout 4. Open the control panel, go to 'Manage 3D settings', and then 'Program Settings'. Find Fallout 4 in the list, and then scroll down to 'Vertical sync'. Set it to 'Off'. This is another way to uncap your FPS without diving into game files.
Honestly, just enjoy the game as it is. Tweaking the FPS cap can lead to more problems than it solves. From personal experience, uncapping the FPS made my game run faster than a radroach on Nuka-Cola Quantum. Wasn't worth the hassle for those extra frames.
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