Minimum System Requirement:
* OS:Windows XP
* Processor:Intel Pentium 4 2.8GHz(3.2GHz for Windows Vista)
* RAM:1GB(Windows XP)/1.5GB (Windows Vista)
* Video Memory:256MB
* Graphic:NVIDIA GeForce 6800GT
* Free Hard Disk Space:15GB
* DirectX Version:9
So, as per your system configs, you can definately run it at medium settings.