Taking a look at the min reqs you will require a Radeon HD 7950 graphics card with a Core i3-4340 3.6GHz or FX-6300 processor to reach the minimum Call of Duty: Modern Warfare 2 (2024) specs, run on low graphics setting and 720p. Recommended needs around a 4 year old PC to run.
In terms of CPU, you'll need to equip your gaming PC with an Intel Core i3-6100, Intel Core i5-2500K, AMD Ryzen 3 1200 CPU or better to meet minimum specs.