Yes, you’ll definitely need one powerful machine to run Crysis. Recommended requirements after the jump. Here are the minimum requirements:

CPU: Athlon 64 3000+/Intel 2.8GHz; Graphics: NVIDIA 6600/X800GTO (SM 2.0); RAM: 768MB/1GB; HDD: 6GB; Internet: 256k+; Optical Drive: DVD; Software: DX9.0c with Windows XP

[via Kotaku]

Recommended Requirements

CPU: Dual-core CPU (Athlon X2/Pentium D)
Graphics: Nvidia 7800GTX/ATI X1800XT (SM 3.0) or DX10 equivalent
RAM: 1.5GB
HDD: 6GB
Internet: 512k+ (128k+ upstream)
Optical Drive: DVD
Software: DX10 with Windows Vista