Higher than I expected.
Minimum:
OS: Windows Vista / Windows 7
Processor: Dual Core 2.4GHz processor
Memory: 4 GB RAM
Graphics: Shader 4.0 compatible card (minimum: Nvidia GeForce 9800, AMD Radeon 4830)
Hard Drive: 5 GB HD space
Other Requirements: Broadband Internet connection
Additional: Onboard Video Card: Not Supported
Recommended:
OS: Windows Vista / Windows 7
Processor: Quad Core Intel or AMD processor
Memory: 4 GB RAM
Graphics: Shader 4.0 compatible card (recommended: Nvidia GeForce 460, AMD Radeon 5870)
Hard Drive: 5 GB HD space
Other Requirements: Broadband Internet connection
Additional: Onboard Video Card: Not Supported