Duke Nukem Forever: Interactive comparison between Minimum and Maximum Settings
Though Duke Nukem Forever has been in the making for over a decade, it doesn't look too bad when played on the PC. But ow well does it scale with older PCs? Check this Slider Comparison between the Maximum and Minimum Settings of the game - drag the sliders to start or click on the links underneath each picture.
Please note that the differences in contrast/brightness are console specific (i.e. "Super White" on PS3) and depict the real contrast levels you get on your screen.