In the Display tab, turn V-Sync (Gameplay) and V-Sync (Menus) Off . V-Sync syncs your FPS to your monitor's refresh rate, but if it misreads your monitor's capabilities, it can force a 45 FPS lock. 2. Correct Windows and In-Game Refresh Rates
External settings can override your game's performance targets.
To help find the exact cause of your performance drop, tell me: What and processor do you use? Do you play via Steam or Battle.net ?
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) cod mw3 45 fps fix
External GPU software can override your in-game settings and force a lower frame limit. For NVIDIA Users Right-click your desktop and open the . Click Manage 3D Settings on the left menu.
If experiencing sudden drops, disable Resizable BAR (Nvidia) or Smart Access Memory (AMD) in your system BIOS. Steam Launch Options:
The most common cause for a specific FPS cap is an active in-game setting. In the Display tab, turn V-Sync (Gameplay) and
Ensure "Custom Frame Rate Limit" is set to "Unlimited" or at least higher than 45. Some users found this setting bugged or accidentally lowered.
Turn off V-Sync both in-game and in your graphics card control panel. V-Sync can malfunction and lock your performance to fractions of your monitor's refresh rate (like 45 FPS on a 90Hz screen).
Ultimate Guide to Fixing the 45 FPS Cap in Call of Duty: Modern Warfare III Correct Windows and In-Game Refresh Rates External settings
The Call of Duty engine (IW 9.0) is notoriously sensitive to background software and hybrid CPU architectures. A locked 45 FPS is rarely a hardware failure; it is almost always a .
If the FPS jumps to 60, 75, or 100+, you are done. If it stays at 45, proceed.