Here are the Far Cry Primal System Requirements (Minimum)
CPU: Core i3-550 / Phenom II X4 955
CPU SPEED: Info
RAM: 4 GB
VIDEO CARD: Nvidia GeForce GTX 460 / Radeon HD 5770 1 GB
DEDICATED VIDEO RAM: 1 GB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Windows 7, Windows 8.1, Windows 10 (64-bit versions only)
FREE DISK SPACE: 20 GB

Far Cry Primal Recommended Requirements
CPU: Intel Core i7-2600K | AMD FX-8350 or equivalent
CPU SPEED: Info
RAM: 8 GB
VIDEO CARD: NVIDIA GeForce GTX 780 | AMD Radeon R9 280X or equivalent
DEDICATED VIDEO RAM: 3072 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: Windows 7, Windows 8.1, Windows 10 (64-bit versions only)
FREE DISK SPACE: 20 GB