Fix: Cod Mw3 45 Fps

Many players experience a hard lock at 45 FPS or unusually low frame rates in Modern Warfare III, even on hardware capable of higher performance. This issue is rarely due to a single cause but stems from a combination of rendering settings, driver behavior, Windows power management, and game file corruption. This report provides a tiered troubleshooting guide.

If the game thinks your monitor is running at 90Hz (instead of 144Hz or 240Hz), it will cap FPS to half that rate. Sometimes Windows Update resets your refresh rate.

Unlock 45 FPS Cap & Stabilize Frame Pacing (MW3 2011)

Before we fix the problem, you need to understand why 45 is the magic number. Typically, 45 FPS occurs due to the following technical reasons: cod mw3 45 fps fix

Let’s fix it.

If you land at 45 FPS, run this mental checklist:

If the framerate is too low to navigate menus effectively, or if the settings revert upon restart, a manual config file edit is required. Many players experience a hard lock at 45

Locate the file named options.3.cod23 (or sometimes simply options inside the players folder).

Open this file using Notepad or a text editor.

Press Ctrl+F to search for the following lines and edit them accordingly:

Find: R_Vsync

Find: R_fullscreen

Save the file and close it.

Launch the game. The FPS cap should be removed.

In 80% of cases, the 45 FPS lock in MW3 is caused by a conflict between Dynamic Resolution and V-Sync. The game tries to dynamically scale your resolution to save performance, but if it conflicts with your monitor's refresh rate, it gets stuck.

Step-by-step:

Find NVIDIA Reflex Low Latency. Set this to On + Boost.

Apply the changes. If the FPS jumps to 60, 75, or 100+, you are done. If it stays at 45, proceed. Before we fix the problem, you need to

Set these in Options → Graphics → Quality: