The game runs fine for me, but only after getting past the hot garbage that is uplay. Gameplay itself is silky smooth.
Proc: Intel i7-3770k 3.5 Ghz
Video Card: Asus GTX 670 DirectCu II 2 GB
Ram: 16 GB Kingston HyperX Genesis 4X 4GB
OS: Windows 8 Pro 64 Bit