KitGuru published a performance analysis of Far Cry 5 for the PC
A quote from the article:
Far Cry 5 is built on the Dunia Engine, and as you can see above, there are a few graphics options to tinker with, but not as many as some other AAA games.Far Cry 5 PC Performance Analysis
For benchmarking Far Cry 5, we used the in-built benchmark which proved to be very consistent and reliable – I would go as far as to say it is probably the best baked-in game benchmark I have ever used in terms of its consistency. After playing through the story mode for a couple of hours, I can also say that the benchmark figures closely resemble real-world in-game performance as well.