UT2K3 can also be run in OpenGL mode. By default the game is set to run in Direct3D, but inside the INI file there is a setting to REM out the D3D renderer and instead use the OpenGL renderer. We have created two sets of INI files, one set that has the D3D renderer enabled and one set that has the OGL renderer enabled. All you have to do is select which one you want to
benchmark in.