Windows 11 automatically lowers refresh rate on some laptops/desktops to save power.
Even with GSync/FreeSync off, the game sometimes forces VRR.
The most frequent culprit behind a 45 FPS lock is how the game manages refresh rates and vertical synchronization. Disable V-Sync and Match Refresh Rates
Find and change (or add) these lines: seta sys_maxfps "0" seta r_swapInterval "0" seta com_maxFPS "0" seta g_framerateLimit "0"
Beyond the game, your operating system and drivers play a crucial role. cod mw3 45 fps fix
Ultimate Guide to Fix the 45 FPS Cap in Call of Duty: MW3 Performance drops can instantly ruin your multiplayer matches or Warzone runs. A common and frustrating issue in Call of Duty: Modern Warfare 3 is getting permanently locked at exactly 45 FPS, regardless of your hardware.
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A 45 FPS lock in Modern Warfare 3 is almost always solvable. The most common fix is simply disabling V-Sync and setting a custom framerate cap. If that doesn't work, the problem is either a hidden cap in your GPU software or a hardware bottleneck caused by high graphics settings.
: In the game settings, navigate to the Account & Network or Graphics tab and set Eco Mode to Custom or Off . Windows 11 automatically lowers refresh rate on some
If you see this symbol, try these fixes even if your internet seems fine:
| Situation | What it Looks Like | Likely Cause | | :--- | :--- | :--- | | | Your FPS varies widely, often between 35-45 FPS, but sometimes dips lower, especially during intense action. Low settings don't dramatically improve your max FPS. | Your CPU or GPU is running at its maximum capacity and cannot render frames any faster. It's a performance ceiling. | | Software Limiter | Your FPS is extremely stable, often glued to a number like 45, 60, 72, or 75, and never exceeds it, even in simple scenes. | A software setting is actively capping your FPS. This could be V-Sync, a custom framerate limit in the game, or settings in your GPU's control panel. |
Follow this comprehensive troubleshooting guide to unlock your frame rate and achieve smooth performance. 1. Correct In-Game Display and Frame Rate Settings
If in-game settings aren't enough, a hidden configuration file can unlock significant performance gains. This tweak forces the game to use the correct number of CPU cores. Disable V-Sync and Match Refresh Rates Find and
This is the most overlooked fix. Call of Duty has a documented memory leak conflict with hardware monitoring and RGB synchronization software.
In MW3 , mode sometimes misbehaves, hard-capping FPS to half your refresh rate (e.g., 90Hz monitor → 45 FPS lock).
Disable the overlay interface within the launcher settings for Call of Duty.