Avalanche Studios has released the minimum and recommended specs for playing Mad Max on PC.

The post-apocalyptic open-world brawler/vehicular combat game requires:

OS: 64 bit: Vista, Win 7, Win 8
Processor: Intel Core i5-650, 3.2 GHz or AMD Phenom II X4 965, 3.4 Ghz
Memory: 6 GB RAM
Graphics: NVIDIA GeForce GTX 660ti (2 GB Memory or higher) or AMD Radeon HD 7870 (2 GB Memory or higher)
DirectX: Version 11
Hard Drive: 32 GB available space

But for the best, most oppressive wasteland experience, you'll need the rather intense recommended specs:

OS: 64 bit: Win 7 SP1, Win 8.1
Processor: Intel Core i7-3770, 3.4 GHz or AMD FX-8350, 4.0 GHz
Memory: 8 GB RAM
Graphics: NVIDIA GeForce GTX 760 (3 GB Memory or higher) or AMD Radeon HD 7970 (3 GB Memory or higher)
DirectX: Version 11
Hard Drive: 32 GB available space

Mad Max releases September 1st on new-gen consoles and PC.