Prepare to be shocked:
Minimum:
Source: http://blog.ubi.com/assassins-creed-unity-pc-specs/
Minimum:
■ Processor: Intel Core i5-2500K @ 3.3 GHz or AMD FX-8350 @ 4.0 GHz or AMD Phenom II x4 940 @ 3.0 GHz
■ RAM: 6 GB
■ Graphics card: NVIDIA GeForce GTX 680 or AMD Radeon HD 7970 (2 GB VRAM)
■ Processor: Intel Core i7-3770 @ 3.4 GHz or AMD FX-8350 @ 4.0 GHz or better
■ RAM: 8 GB
■ Graphics card: NVIDIA GeForce GTX 780 or AMD Radeon R9 290X (3 GB VRAM)
Source: http://blog.ubi.com/assassins-creed-unity-pc-specs/