Processor: AMD 64 3200+/Intel Pentium 4 3.0GHz or betternope
Memory: 8 GB free hard-drive space, 512MB RAM (XP)/1GB RAM (Vista)
Graphics: Shader 3.0 or better, 256MB Nvidia GeForce 6600GT/ATI Radeon 1600XT or better
While Treyarch was provided with the technology that powered Call of Duty 4: Modern Warfare, project lead Cesar Statsny GameSpot that the studio was "able to achieve this graphical intensity with only a modest bump in the minimum requirements from COD4."
Meanwhile, series creator and Call of Duty 4 developer Infinity Ward is currently working on what publisher Activision refers to as Call of Duty 6, which releases next year.