These were tweeted by a Bethesda dev. 

Minimum System Requirements

* OS: 7/Vista/XP PC (32 or 64 bit)
* CPU: Dual Core 2.0GHz or equivalent processor
* RAM: 2 GB
* HDD: 6 GB
* Graphics: 512 MB card
* Sound Card: DirectX 9 Compatible
* DirectX: Version 9.0c
* Internet for Steam activation

Recommended System Requirements

* OS: Windows 7/Vista/XP (32 or 64 bit)
* CPU: Quad-core Intel or AMD CPU
* RAM: 4 GB
* HDD: 6 GB free disk space
* Graphics: 1 GB Graphics Memory
* Sound Card: DirectX 9 Compatible
* DirectX: Version 9.0c
* Internet for Steam activation

I CAN GET IT FOR PC!