Right-click the game in your Steam Library > > General .
The game engine often misidentifies hybrid CPUs (Intel 12th-14th gen with P-cores and E-cores) and tries to use efficiency cores for rendering, resulting in a 45 FPS lock. Manual worker count forces the game to use performance cores. cod mw3 45 fps fix
You can manually override the engine's internal frame limit. Right-click the game in your Steam Library > > General
Windows might be throttling your hardware or misidentifying your monitor. You can manually override the engine's internal frame limit
Install the new driver using the "Express" or "Clean Install" option. 4. Fix Overlay and Background App Conflicts
Windowed modes often force your game to inherit the refresh rate restrictions of your Windows desktop or background applications.
In Steam, right-click the game > Properties > General > Launch Options , and type -refresh 60 (or your monitor's rate) to force a higher refresh lock. For MW3 (2023 Version)