Install a mod that removes the 60 FPS cap, such as SMAPI-compatible frame rate mods
Use the game’s borderless or windowed mode instead of exclusive fullscreen
Disable V-Sync in the game and in your GPU control panel
Set your monitor refresh rate above 60 Hz in Windows display settings
Make sure your GPU driver is up to date
Close overlays and background apps that may limit frame rate
Check for mods or settings that force the game to 60 FPS
If using a laptop, set the game and system to high-performance mode
Verify your monitor, cable, and port support refresh rates above 60 Hz
If the game still stays at 60 FPS, use a mod specifically designed to unlock FPS in Stardew Valley