http://gameinfocenter.com/pc-games/system-requirements/HITMAN-ABSOLUTION.html
Minimum system requirements
Predicted system requirements
* OS: Windows XP, Vista or Windows 7
* CPU: Intel Core 2 Duo 2.66 GHz or similar
* RAM: 2 GB
* HDD: 15 GB free disk space
* Graphics: 512 MB Graphics Memory
* Sound Card: DirectX 9 Compatible
* DirectX: Version 9
Recommended system requirements
Predicted system requirements
* OS: Windows XP, Vista or Windows 7
* CPU: Intel Core 2 Quad 2.4GHz or AMD Phenom X4 2.6GHz or greater
* RAM: 4 GB
* HDD: 20 GB free disk space
* Graphics: 1024 MB Graphics Memory
* Sound Card: DirectX 9 Compatible
* DirectX: Version 9