minimum system requirements
os: Windows vista (service pack 2) 32-bit
processor: 2 ghz dual core (core 2 duo 2.4 ghz or althon x2 2.7 ghz)
memory: 2 gb
hard drive: 20 gb
graphics card (amd): Directx 10.1 compatible with 512 mb ram (ati radeon 3000, 4000, 5000 or 6000 series, with ati radeon 3870 or higher performance)
graphics card (nvidia): Directx 10.0 compatible with 512 mb ram (nvidia geforce 8, 9, 200, 300, 400 or 500 series with nvidia geforce 8800 gt or higher performance)
sound card: Directx compatible
keyboard and mouse
dvd rom drive
recommended system requirements
os: Windows 7 64-bit
processor: Quad-core cpu
memory: 4 gb
hard drive: 20 gb
graphics card: Directx 11 compatible with 1024 mb ram (nvidia geforce gtx 560 or ati radeon 6950)
sound card: Directx compatible
keyboard and mouse
dvd rom drive
Since Battlefield 3 won’t be supporting DirecX 9, it won’t run on Windows XP.