Ubisoft have released PC specs for the upcoming Far Cry 3.
Minimum specs
Processor: 2.66 GHz Intel® Core™2 Duo E6700 or 3.00 GHz AMD Athlon™ 64 X2 6000+ or better
RAM: 4 GB
Video Card: 512 MB DirectX 9.0-compliant card with Shader Model 4.0 or higher (see supported list)
Recommended Specs
Processor: Intel Core i3-530 or AMD Phenom II X2 565 or better
RAM: 6 GB
Video Card: 1024 MB DirectX 11-compliant card with Shader Model 4.0 or higher (see supported list)
Hi-Performance Specs
Processor: Intel Core i7-2600K or AMD FX-4150 or better
RAM: 8 GB
Video Card: 1024 MB DirectX 11-compliant card with Shader Model 4.0 or higher (see supported list)
Supported Video Cards:
ATI Radeon HD 2900 / 3000 / 4000 / 5000 / 6000 / 7000 series
Nvidia GeForce GTX 8800 / GTX 9000 / GT 200 / GT 400 / GT 500 / GT 600 series
(Laptop versions of these cards may work but are NOT supported. These chipsets are the only ones that will run this game.)
As far as DRM goes Far Cry 3 will make use of Ubisoft's less intrusive approach as described below:
"A one-time activation of Far Cry 3 for PC is performed via Uplay PC. An internet connection is required for this one-time activation process. Once activated, the game can be played online to enjoy new social features in single player and multiplayer, such as Friends, Party and Chat, or switched to offline mode in the Uplay PC settings menu for a single player experience without broadband connection."