Here are the Assassin\'s Creed: Brotherhood System Requirements (Minimum)
CPU: 1.8 GHz Intel Core 2 Duo or 2.4 GHz AMD Athlon X2 64
RAM: 1.5 GB Windows XP / 2 GB Windows Vista - Windows 7
OS: Windows XP (32-64 bit) / Windows Vista (32-64 bit) / Windows 7 (32-64 bit)
VIDEO CARD: 256 MB DirectX 9.0-compliant card with Shader Model 3.0 or higher (ATI RADEON HD 2000/3000/4000/5000/6000 series / NVIDIA GeForce 8/9/100/200/300/400/500 series)