SYSTEM REQUIREMENTS
CPU: Intel(R) Pentium(R) 4 2.4 GHz or AMD(R) Athlon(TM) 64 2800+ processor or any 1.8Ghz Dual Core Processor
or better supported
RAM: 512MB RAM (768MB for Windows Vista)
Hard Drive: 8GB of free space
Video card: NVIDIA(R) Geforce(TM) 6600 or better or ATI(R) Radeon(R) 9800 Pro or better
Read more: http://www.world4free.in/2009/02/call-of-duty-4-modern-warfare-pc-game.html#ixzz16zUITcF3