Depending on the configuration, the Power Mac G4 computer comes either an ATI or an Nvidia graphics card installed in the 4x AGP slot. The main features of the graphics cards are as follows:
| Graphics IC | Video RAM | Connectors |
| ATI RV200 | 32 MB DDR | ADC and VGA |
| Nvidia NV17 | 64 MB DDR | ADC and VGA |
EIther graphics card can support two monitors at the same time.
The display memory on the AGP graphics card is separate from the main memory. The display memory consists of 32 or 64 MB of DDR devices configured to make a 128-bit data bus. The display memory cannot be expanded by the user.
The digital flat-panel display can have pixel depths of 8, 16, or 32 for a display up to 1600 by 1024 pixels. The analog monitor display can have pixel depths of 8, 16, or 32 bpp for all displays up to 1920 by 1440 pixels.
For more information about the features of the graphics card and the monitors it supports, see "Video Monitor Ports".