Ubisoft accidentally posted the base PC specification for their upcoming PC Game Watch Dog. Currently its pulled out, but that was too late as various people got the hold of the information.
Uplay store revealed in their minimum specs that the system will need to have a GPU with DX11 support with 1GB VRAM. The system will require atleast a quad core with 4GB ram, which example such as C2Q Q6600 and Phenom X4 9750 was pointed out.
As far as recommended specifications are concerned, it requires DX11 card with 2GB VRAM support, followed by 8-Core system and 8GB memory, hinting with an example Nvidia GTX560Ti and AMD Radeon HD 7850 for GPU and i7-2770 and AMD FX-8350 as 8-core CPU.
In both cases, it will require 64-bit OS.
Watch Dogs will also be available for Xbox 360, PS3 and Wii U.