Minimum:

OS: Windows® XP / Windows Vista® / Windows® 7 (only)
Processor: 3.0 GHz Intel® Pentium® 4 or 1.8 GHz AMD Athlon™ 64 3000+
Memory: 1 GB Windows XP / 1.5 GB Windows Vista, 7
Video Card: 128 MB DirectX® 9.0c-compliant video card or higher* (see supported list)
Sound: DirectX 9.0c-compliant
Peripherals Supported: Windows-compatible keyboard, mouse, optional controller (Xbox 360® Controller for Windows recommended)

*Supported Video Cards at Time of Release:

Rayman Origins screenshots