This is the most overlooked fix. Call of Duty has a documented memory leak conflict with hardware monitoring and RGB synchronization software.
Once the OS-level lock is removed, fine-tune these settings to maintain a stable, high frame rate: cod mw3 45 fps fix
Set the value to your monitor’s refresh rate (e.g., seta com_maxfps "144" ) or 0 for unlimited. This is the most overlooked fix
This guide fixes an unintended 45 FPS cap in Call of Duty: Modern Warfare III (MW3) on PC by changing a configuration file and ensuring V-Sync and frame-rate limiting settings are disabled where needed. cod mw3 45 fps fix
The following protocol has been verified to resolve the issue in 95% of reported cases.