The hardware you'll need to meet the Call of Duty Modern Warfare 2 recommended system requirements isn't that much higher. Crafting a team of 12GB of RAM and a processor as powerful as the Intel Core i7 4770 or AMD Ryzen 5 1400 will help maintain higher minimum and maximum frame rates.
The minimum requirements to play CoD MW2 on PC are: Operating System: Windows 10 64-bit (latest update)Processor: Intel Core i3-6100 / Core i5-2500K or AMD Ryzen 3 1200.