Crysis 3 having high-end PC specs is about as eyebrow-raising as Cliff Bleszinski posting a photo of a courting game studio. Nonetheless, EA has published the shooter's minimum, recommended, and hi-performance system requirements for your perusal.
For starters, DirectX 11 support is a minimum, which means Windows XP isn't on the guest list. Also minimums are a 1GB graphics card and dual core CPU, with EA detailing Nvidia GTS 450 & Intel Core2 Duo 2.4Ghz (E6660) and AMD Radeon HD5770 & AMD Athlon 65 X2 2.7 Ghz (5200+) as example minimalist Intel and AMD setups respectively.
The full list of specifications is after the break.