Bethesda have sketched out the Rage system requirements on the Bethblog. How will your machine react to the powerful new id Tech 5 engine, with a sigh of relief, or tears of water-cooled sorrow? In fact, if your rig needs water cooling, it'll probably run Rage just fine. See the minimum and recommended requirements below.
Minimum:
OS: Win XP SP3, Vista, Win 7
Processor: Intel Core 2 Duo or Equivalent AMD
Memory: 2GB
Hard Disk Space: 25GB
Video Card: GeForce 8800, Radeon HD 4200
Recommended:
OS: Win XP SP3, Vista, Win 7
Processor: Intel Core 2 Quad or Equivalent AMD
Memory: 4GB
Hard Disk Space: 25GB
Video Card: GeForce 9800 GTX, ATI Radeon HD 5550