If you are experiencing a hard lock at 45 frames per second (or sometimes 30/40 FPS), you are not alone. This specific issue has plagued the Call of Duty engine since the Warzone 1.0 days. Unlike general FPS drops (which fluctuate), a indicates a specific software conflict, a rendering bottleneck, or a deliberate (but bugged) game setting.
. This feature, meant to keep laptops quiet, was effectively strangling his GPU to keep the fans from screaming, locking him at exactly 40–45 FPS. With a click, he disabled it. Next, he dove into the in-game menus. He checked cod mw3 45 fps fix