Here are the full Prince of Persia the forgotten sands system requirements. We were passed these figures from a reliable source but are still awaiting confirmation from Ubisoft on these numbers

Minimum System Requirements

CPU: 1.6 GHz dual-core Intel Pentium D or AMD Athlon 64 X2 3800+
RAM: 1 GB Windows XP / 2 GB Windows Vista, Windows 7
Graphics: 256 MB DirectX 9.0c-compliant card with Shader Model 3.0 or higher (NVIDIA GeForce 6800 / ATI RADEON X1600) (see supported list*)
HDD: 8 GB

Recommended System Requirements

CPU: 2.2 GHz Intel Core 2 Duo or AMD Athlon 64 X2 4400+ or higher
RAM: 2 GB / 4 GB
Graphics: 512 MB DirectX 9.0c-compliant card with Shader Model 3.0 or higher (NVIDIA GeForce 8600 GT / ATI RADEON HD 2600 PRO) (see supported list*)

Recommended control device: Windows-compliant keyboard, mouse, optional controller (Xbox 360 Controller for Windows recommended)
Note: *Supported Video Cards at Time of Release: NVIDIA GeForce 6800 / 7 / 8 / 9 / 100 / 200 / GTX series ATI RADEON X1600 / HD 2000 / HD 3000 / HD 4000 / HD 5000 series Laptop versions of these cards may work but are NOT supported. These chipsets are the only ones that will run this game.