In case anyone missed this, and since it's always being asked...

Minimum System Requirements


* English version of Microsoft(r) Windows(r) 98SE/ME/2000/XP
* Pentium(r) III 1.0GHz (1000MHz) or Athlon(tm) 1.0GHz (1000MHz) processor or higher
* 256MB RAM
* 8x Speed CD-ROM drive (1200KB/sec sustained transfer rate) and latest drivers
* 300MB of uncompressed free hard disk space
* 100% DirectX(r) 9.0b compatible 16-bit sound card and latest drivers
* 100% Windows(r) 98SE/ME/2000/XP compatible mouse, keyboard and latest drivers
* DirectX(r) 9.0b
* 3D hardware Accelerator Card Required - 100% DirectX(r) 9.0b compatible 64MB Hardware Accelerated video card and the latest drivers.


http://pc.ign.com/articles/540/540898p2.html