Watch Dogs' PC minimum and recommended requirements have been confirmed from a previous leak in October of last year. The game will require a 64bit operating system as standard, with no support for 32bit, and 25GB of free hard drive space.
The specs for minimum and recommended settings are as follows:
GPU: DirectX 11 graphics card with 1 GB Video RAM
CPU: Quad core
GPU: DirectX 11 graphics card with 2 GB Video RAM
CPU: Eight core