45 FPS is almost always or half of 90 FPS limit . MW3 has a known bug where:
: Especially on laptops, the game may default to integrated graphics instead of your dedicated Nvidia or AMD card. cod mw3 45 fps fix
Depending on which version of Call of Duty: Modern Warfare 3 you are playing—the or the 2023 reboot —the "45 FPS" issue usually stems from either a hard-coded engine cap or incorrect display settings. For MW3 (2011 Version) 45 FPS is almost always or half of 90 FPS limit