Obtained from crysis-online

Crysis specs are:

Minimum Requirements

CPU:

Intel Pentium 4 2.8 GHz (3.2 GHz for Vista), Intel Core 2.0 GHz (2.2 GHz for Vista), AMD Athlon 2800+ (3200+ for Vista) or better
RAM:

1GB (1.5GB on Windows Vista)
Video Card:

NVIDIA GeForce 6800 GT, ATI Radeon 9800 Pro (Radeon X800 Pro for Vista) or better
VRAM:

256MB of Graphics Memory
Storage:

12GB
Sound Card:

DirectX 9.0c Compatible
ODD:

DVD-ROM
OS:

Microsoft Windows XP or Vista
DirectX:

DX9.0c or DX10


Recommended Requirements

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
OS:

Microsoft Windows XP or Vista
DirectX:

DX9.0c or DX10