ARMA 3 System Requirements and Gameplay Video

Minimum:

OS:Windows Vista SP2 or Windows 7 SP1
Processor:Intel Dual-Core 2.4 GHz or AMD Dual-Core Athlon 2.5 GHz
Memory:2 GB RAM
Graphics:NVIDIA GeForce 8800GT or AMD Radeon HD 3830 or Intel HD Graphics 4000 with 512 MB VRAM
DirectX®:10
Hard Drive:10 GB HD space
Sound:DirectX®-compatible

Recommended:

OS:Windows Vista SP2 or Windows 7 SP1
Processor:Intel Core i5-2300 or AMD Phenom II X4 940 or better
Memory:4 GB RAM
Graphics:NVIDIA GeForce GTX 560 or AMD Radeon HD 7750 with 1 GB VRAM or better
DirectX®:11
Hard Drive:20 GB HD space
Sound:DirectX®-compatible