minimum: 2.8GHz Pentium 4 or equivalent, 512mb RAM, NVIDIA GeForce 6 series. For max settings: 3-4GHz Pentium 4 or equivalent, 1Gb Ram, Nvidia 6800GT/ultra or 7800GT/GTX SLI Unreal Tournament 2007 will also have enhanced textures for the 64 bit version of the game. These requirements are not official, but beta testers from PC Games Hardware and Extreme-Players concur that you can expect requirements pretty close to this.
