Here are the Watch Dogs 2 System Requirements (Minimum)
CPU: Intel Core i5 2400s @ 2.5 GHz, AMD FX 6120 @ 3.5 GHz or better
CPU SPEED: Info
RAM: 6 GB
VIDEO CARD: NVIDIA GeForce GTX 660 with 2 GB VRAM or AMD Radeon HD 7870, with 2 GB VRAM or better
DEDICATED VIDEO RAM: 2048 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Windows 7 SP1, Windows 8.1, Windows 10 (64bit versions only)
FREE DISK SPACE: 50 GB
SOUND CARD: DirectX compatible using the latest drivers

Watch Dogs 2 Recommended Requirements
CPU: Intel Core i5 3470 @ 3.2 GHz, AMD FX 8120 @ 3.9 GHz
CPU SPEED: Info
RAM: 8 GB
VIDEO CARD: NVIDIA GeForce GTX 780 | AMD Radeon R9 290, with 3GB VRAM or better
DEDICATED VIDEO RAM: 3072 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Windows 7 SP1, Windows 8.1, Windows 10 (64bit versions only)
FREE DISK SPACE: 50 GB
SOUND CARD: DirectX compatible using the latest drivers