System Requirements:
Operating system: Windows XP / Vista
Processor: 2.0 GHz + (3 GHz Pentium 4 or equivalent rec.)
Memory: 512MB (1GB rec.) Sound: DirectX 8.1 sound device
Video: 64MB DirectX 8.1-compliant video card (128MB rec.)
DirectX®: Version 9.0c or better
From the site.
It even runs on my shit PC so it's really not much.