PC requirements

Just Cause 3 System Requirements

Just Cause 3 needs at least Intel Core i5-2500k, 3.3GHz / AMD Phenom II X6 1075T 3GHz, 8 GB RAM and NVIDIA GeForce GTX 670 (2GB) / AMD Radeon HD 7870 (2GB) graphics. For the recommended experience you want Intel Core i7-3770, 3.4 GHz / AMD FX-8350, 4.0 GHz, 8 GB RAM and NVIDIA GeForce GTX 780 (3GB) / AMD R9 290 (4GB) graphics.

Verified Sources: Steam store listing
Just Cause 3 minimum and recommended PC specifications
Component Minimum Recommended
Operating system Vista SP2 / Windows 7.1 SP1 / Windows 8.1 (64-bit Operating System Required) Vista SP2 / Windows 7.1 SP1 / Windows 8.1 (64-bit Operating System Required)
Processor Intel Core i5-2500k, 3.3GHz / AMD Phenom II X6 1075T 3GHz Intel Core i7-3770, 3.4 GHz / AMD FX-8350, 4.0 GHz
Memory 8 GB RAM 8 GB RAM
Graphics NVIDIA GeForce GTX 670 (2GB) / AMD Radeon HD 7870 (2GB) NVIDIA GeForce GTX 780 (3GB) / AMD R9 290 (4GB)
Storage 54 GB available space 54 GB available space
Not sure how your PC compares? Use the Can I Run It checker — pick your CPU and GPU and it tells you which column you land in.

Other platforms

Just Cause 3 is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Just Cause 3 on PC

Can my PC run Just Cause 3?
Compare your CPU, GPU and RAM against the minimum column below. If your parts match or beat every minimum row, the game will launch — though you may need to lower settings. Matching the recommended column is what gets you 60fps at 1080p.
How much storage does Just Cause 3 need?
54 GB available space
What is the difference between minimum and recommended specs?
Minimum means the game starts and is playable, usually at 30fps on low settings at 1080p. Recommended is the developer's target for a smooth 60fps experience at high settings.