Minimum:

OS: Microsoft® Windows® 2000/XP
Processor: 800 MHz Intel Pentium III or 800 MHz AMD Athlon or 1.2GHz Intel Celeron or 1.2 GHz AMD Duron processor
Memory: 128 MB of RAM
Graphics: 32 MB video card with DirectX 9.0 compatible drivers ("GeForce" or better)
DirectX Version: Microsoft DirectX® 9.0
Hard Drive: 915 MB of free hard disk space (+ 635 MB if video card does NOT support DirectX Texture Compression)
Sound Card: Sound Card with DirectX 9.0

Recommended:

Processor: Intel Pentium IV or AMD Athlon XP processor 256(+) MB of RAM
Memory: 1.55 GB of free hard disk space(+ 635 MB if video card does NOT support DirectX Texture Compression)
Graphics: 64(+) MB video card with DirectX 9.0 compatible drivers ("GeForce 3" / "Radeon 8500" or better with DirectX Texture Compression support)

best 6th gen