Here are the Medal of Honor: Warfighter System Requirements (Minimum)
CPU: Intel Core 2 Duo 2.4GHz / Athlon X2 2.7GHz
CPU SPEED: Info
RAM: 2 GB
VIDEO CARD: NVidia 8800 GTS 512 MB VRAM or better / ATI Radeon 3870 512 MB VRAM
DEDICATED VIDEO RAM: 512 MB
PIXEL SHADER: 4.0
VERTEX SHADER: 4.0
OS: Windows Vista
FREE DISK SPACE: 20 GB
SOUND CARD: Yes

Medal of Honor: Warfighter Recommended Requirements
CPU: Intel Core 2 Quad 3GHz / AMD Phenom II X4 3GHz
CPU SPEED: Info
RAM: 4 GB
VIDEO CARD: NVidia GTX 560 1024 MB VRAM or better / ATI Radeon 6950 1024 MB VRAM
DEDICATED VIDEO RAM: 1024 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Windows 7
FREE DISK SPACE: 20 GB
SOUND CARD: Yes