First up, the minimum specs and the recommended specs.
Minimum Specs
OS: Windows Vista or newer
Processor: Intel Core i5-660 CPU or equivalent
Memory: 4 GB RAM
Graphics: Radeon HD 5870 or equivalent
DirectX: Version 9.0c
Storage: 22 GB available space
...
OS: Windows Vista or newer
Processor: Intel Core i5-660 CPU or equivalent
Memory: 4 GB RAM
Graphics: Radeon HD 5870 or equivalent
DirectX: Version 9.0c
Storage: 22 GB available space