Crytek and EA unveiled the minimum and recommended system requirements for Crysis.
Minimum System Requirements:
OS--Windows XP or Windows Vista
Processor--2.8GHz or faster (XP); 3.2GHz or faster* (Vista)
Memory--1GB RAM or 1.5GB RAM (Vista)
Sound Card DirectX 9.0c compatible
* Supported Processors: Intel Pentium 4 2.8GHz (3.2GHz for Vista) or faster, Intel Core 2GHz (2.2GHz for Vista) or faster, and other similar CPUs.
** Supported chipsets: NVIDIA GeForce 6800 GT + or similar GPUs. Laptop versions of these chipsets may work but are not supported. Integrated chipsets are not supported. Updates to your video and sound card drivers may be required.