Call of Duty: Modern Warfare 3 at 1080p does not demand powerful components, but this build is designed to handle it effortlessly while giving you a modern platform that does much more. The AMD Ryzen 5 9600X is a six-core AM5 processor that runs the game's older DX9 engine without any strain, even during denser campaign scenes with heavy AI. Because the IW 5.0 engine tends to benefit more from per-core speed than from raw core counts, the 9600X's strong single-thread performance keeps frame delivery smooth in every mode. The Sapphire Pulse Radeon RX 9060 XT with 16GB of VRAM is far more GPU than this game will ever use at 1080p, and that is the point. You will never encounter a rendering bottleneck, and you get a card that comfortably handles newer titles if you expand your library. The generous VRAM allocation is not necessary for MW3's simple textures, but it keeps the build feeling current and flexible. The supporting components follow the same philosophy. The ASUS Prime B650-PLUS motherboard gives you a stable AM5 platform with built-in WiFi. The Patriot Viper Elite 5 DDR5-6000 RAM provides fast, low-latency memory at a sensible 16GB capacity. A Kingston NV3 1TB NVMe SSD loads the game quickly and stores plenty of other content. The 650W MSI power supply and Montech AIR 903 case round out a build that is easy to assemble, well-cooled with the Thermalright Peerless Assassin, and ready for community multiplayer through Plutonium with no compatibility headaches. If you only ever played MW3 on this PC, it would be overkill. But as a 1080p gaming PC foundation, it gives you a reliable modern platform that handles this classic shooter at full settings and moves comfortably into anything else you want to play.