45 FPS lock Call of Duty: Modern Warfare 3 is a known issue that typically stems from software conflicts, power-saving features on laptops, or legacy engine bugs in the original 2011 title. Primary Fixes for MW3 45 FPS Lock Disable V-Sync and Frame Caps : Ensure in-game
is set to "Off" and that "Custom Frame Rate Limit" is either set to "Unlimited" or a value significantly higher than 45 Disable Third-Party Caps : Check for external framerate limiters in the NVIDIA Control Panel (Max Frame Rate setting), AMD Software: Adrenalin Edition , or background apps like Check Laptop Power Settings
: If playing on a laptop, being unplugged often triggers a battery-saving cap (often exactly 30 or 45 FPS). Connect to power and set your Windows Power Plan to High Performance Ultimate Performance Legacy Engine Bug (2011 Version) cod mw3 45 fps fix
: For the original MW3, an optimization issue on Windows 10/11 can halve performance. Modern fixes include ensuring Full Screen Exclusive mode is enabled and disabling Windows Fullscreen Optimizations in the game's properties Steam Community Toggle Hardware Accelerated GPU Scheduling
: Some players find that toggling this Windows setting (found under System > Display > Graphics) can release stuck frame caps, though a PC restart is required Resizable Bar (ReBar) Conflict : In the newer MW3 (2023), some users report that disabling ReBar 45 FPS lock Call of Duty: Modern Warfare
in the BIOS (or SAM for AMD users) fixes unexpected FPS drops and caps Configuration File Adjustment
If the in-game menu doesn't work, you can manually edit the config file: Feature Title Unlock 45 FPS Cap & Stabilize
Unlock 45 FPS Cap & Stabilize Frame Pacing (MW3 2011)
Editing game files can affect stability or trigger anti-cheat flags if done improperly. Back up files before changing them.
Add these launch arguments:
+set com_maxfps 250 +set r_vsync 0 -fullscreen -windowed -noborder -freq 144
(Replace 144 with your monitor’s refresh rate)