The forum search function is pretty handy.
MINIMUM: 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 spaceRECOMMENDED: 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