Quote:Crysis will no doubt be a fairly demanding game. It will require a good system to perform well. However, CryEngine2 is very scalable so lower end machines will still stand a chance.

Here is a list of confirmed information...

Crysis will run on both DX9 & DX10 as well as Windows XP and Windows Vista.
A graphics card that supports Shader Model 2 or higher is required.
CryEngine2 is estimated to scale back 2 years, and scale ahead 1.5 years.
A single 7800GTX will run the game quite well on fairly high settings according to Crysis Art Director, Michael Khaimzon.
Jack Mamais of Crytek said in an exclusive Crysis-Online interview that his X1900XT runs the game very well at reasonably high settings ( still unoptmized ).
Crysis will dynamically utilize all processing threads available. Meaning quad-core processors will be supported.
The following specs are estimates made by myself based on the above mentioned information and other sources. These estimates are NOT official - but are based on official information.

Minimum Requirements
CPU: Athlon 64 3000+/Intel 2.8ghz
Graphics: Nvidia 6600 or ATI X1600 - Shader Model 2.0
RAM: 1GB
HDD: 6GB
Internet: 256k+
Optical Drive: DVD
Software: DX9 with Windows XP / Vista  

Recommended Requirements
CPU: Dual-Core CPU (Athlon X2 / Pentium D / Core 2 Duo)
Graphics: Nvidia 7800GT or ATI X1800XL Pro (SM 3.0)
RAM: 1.5GB+
HDD: 6GB
Internet: 512k+ (128k+ upstream)
Optical Drive: DVD
Software: DX9 with Windows XP / Vista