In order for you to play Assassin's Creed Unity on Windows with minimal graphics settings, your computer must meet the following requirements
Operating System:
Windows 10
Processor (CPU):
Intel Core i5-2500K @ 3.3 GHz or AMD FX-8350 @ 4.0 GHz
Memory (RAM):
6 GB RAM
Graphics Сard:
NVIDIA GeForce GTX 680 or AMD Radeon HD 7970 (2 GB VRAM)
Storage:
50 GB available space
Sound Card:
DirectX 9.0c compatible sound card with latest drivers
Additional Notes:
Windows-compatible keyboard and mouse required, optional controller
In order to play Assassin's Creed Unity on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
Operating System:
Windows 10
Processor (CPU):
Intel Core i7-3770 @ 3.4 GHz or AMD FX-8350 @ 4.0 GHz or better
Memory (RAM):
8 GB RAM
Graphics Сard:
NVIDIA GeForce GTX 780 or AMD Radeon R9 290X (3 GB VRAM)
Storage:
50 GB available space
Sound Card:
DirectX 9.0c compatible sound card with latest drivers
Additional Notes:
Supported video cards at the time of release: NVIDIA GeForce GTX 680 or better, GeForce GTX 700 series; AMD Radeon HD7970 or better, Radeon R9 200 series Note: Laptop versions of these cards may work but are NOT officially supported.