Although there is no offical information. Our technical experts have estimated the minimum system requirements:

CPU: Intel Pentium 4 2.8 GHz, Intel Core 2.0 GHz, AMD Athlon 2800+ or better
RAM: 1.5GB
Video Card: NVIDIA GeForce 6800 GT, ATI Radeon 9800 Pro or better
VRAM: 256MB of Graphics Memory
Storage: 12GB
Sound Card: DirectX 9.0c Compatible
ODD: DVD-ROM
DirectX: DX9.0c or DX10

But estimate the recommended system requirements to be:

CPU: Core 2 Duo/Athlon X2 or better
RAM: 1.5GB
Video Card: NVIDIA 7800 Series, ATI Radeon 1800 Series or better
VRAM: 512MB of Graphics Memory
Storage: 12GB
Sound Card: DirectX 9.0c Compatible
ODD: DVD-ROM
DirectX: DX9.0c or DX10