Ubisoft revealed the system requirements for Far Cry 3 and they appear to be pretty modest. The absolute minimum you need is an Intel Core 2 Duo E6700 (2.66GHz) or AMD Athlon 64 X2 6000+ or better with 4GB RAM memory and a 512MB DirectX 9.0 graphics card with SM4.0 support.
According to Ubisoft's list, this includes the ATI Radeon HD 2900 / 3000 / 4000 / 5000 / 6000 / 7000 series and Nvidia GeForce GTX 8800 / GTX 9000 / GT 200 / GT 400 / GT 500 / GT 600 series.
The recommended specifications list an Intel Core i3-530 or AMD Phenom II X2 565 or better, with 6GB memory and a 1GB DirectX 11 graphics card, and those who want to get the most out of the game are recommended to have at least an Intel Core i7-2600K or AMD FX-4150, with 8GB RAM and a 1GB DX11 video card.
