Developer Documentation
PATHHardware Documentation > Original Power Mac G3 Computers Developer Note


External Video Connector

The cable from the external monitor plugs into a DB-15 video port located on the enclosure's rear panel. The pin assignments for the external video connector are the same as those for the Power Macintosh 5500 and 6500 computers.

External Video Monitors

This section includes two tables; Table 3-1 provides a list of display modes supported on the external video connector of the All-in-one enclosure, and Table 3-2 lists the display modes supported on the external video connector of the modular desktop and mini-tower enclosures. The display resolution values listed in Table 3-1 and 3-2 are supported on AppleVision monitors or DDC enabled monitors with the proper cable.

All-in-one Display Resolution Modes

The Power Macintosh G3 All-in-one can drive several sizes of external video monitors in display mirror mode. Table 3-1 shows the display resolution, vertical refresh, horizontal refresh, and maximum pixel depths supported by the Power Macintosh G3 All-in-one display graphics subsystem.

Table 3-1 Supported display resolutions for all-in-one enclosure 

Display resolution

Vertical refresh

Horizontal refresh

Maximum pixel depth
2 MB

Maximum pixel depth
4 MB

Maximum pixel depth 6 MB

512 by 384 70 Hz 31.488 kHz 32 32 32
640 by 480 60 Hz 31.469 kHz 32 32 32
640 by 480 67 Hz 35.00 kHz 32 32 32
640 by 480 72 Hz 37.861 kHz 32 32 32
640 by 480 75 Hz 37.500 kHz 32 32 32
640 by 480 85 Hz 43.269 kHz 32 32 32
640 by 870 75 Hz 68.85 kHz 16 32 32
800 by 600 56 Hz 35.156 kHz 32 32 32
800 by 600 60 Hz 37.879 kHz 32 32 32
800 by 600 72 Hz 48.077 kHz 32 32 32
800 by 600 75 Hz 46.875 kHz 32 32 32
800 by 600 85 Hz 53.674 kHz 32 32 32
832 by 624 74.5 Hz 49.725 kHz 32 32 32
1024 by 768 60 Hz 48.363 kHz 16 32 32
1024 by 768 70 Hz 56.476 kHz 16 32 32

Modular Desktop and Mini-tower Display Resolution Modes

Table 3-2 shows the display resolution, vertical refresh, horizontal refresh, and maximum pixel depths supported by the Power Macintosh G3 display graphics subsystem in modular desktop and mini-tower enclosures. New modes supported by the graphics subsystem with the ATI 3D RAGE PRO-PCI graphics controller are indicated with an asterisk*.

Table 3-2 Supported display resolutions for desktop and mini-tower 

Display resolution

Vertical refresh

Horizontal refresh

Maximum pixel depth
2 MB

Maximum pixel depth
4 MB

Maximum pixel depth 6 MB

512 by 384 70 Hz 31.488 kHz 32 32 32
640 by 480 60 Hz 31.469 kHz 32 32 32
640 by 480 67 Hz 35.00 kHz 32 32 32
640 by 480 72 Hz 37.861 kHz 32 32 32
640 by 480 75 Hz 37.500 kHz 32 32 32
640 by 480 85 Hz 43.269 kHz 32 32 32
640 by 870 75 Hz 68.85 kHz 16 32 32
800 by 600 56 Hz 35.156 kHz 32 32 32
800 by 600 60 Hz 37.879 kHz 32 32 32
800 by 600 72 Hz 48.077 kHz 32 32 32
800 by 600 75 Hz 46.875 kHz 32 32 32
800 by 600 85 Hz 53.674 kHz 32 32 32
832 by 624 74.5 Hz 49.725 kHz 32 32 32
1024 by 768 60 Hz 48.363 kHz 16 32 32
1024 by 768 70 Hz 56.476 kHz 16 32 32
1024 by 768
(VESA)
75 Hz 60.023 kHz 16 32 32
1024 by 768
(19" RGB)
75 Hz 60.241 kHz 16 32 32
1024 by 768 85 Hz 68.677 kHz 16 32 32
1152 by 870 75 Hz 68.681 kHz 16 32 32
1280 by 960 75 Hz 75.000 kHz 8 16 32
1280 by 1024 60 Hz 63.981 kHz 8 16 32
1280 by 1024 75 Hz 79.976 kHz 8 16 32
1280 by 1024 85 Hz 91.146 kHz 8 16 32
1600 by 1200 60 Hz 75 kHz 8 16 16
1600 by 1200 65 Hz 81.250 kHz 8 16 16
1600 by 1200 70 Hz 87.500 kHz 8 16 16
1600 by 1200 75 Hz 93.750 kHz 8 16 16
1920 by 1080* 60 Hz 70.313 kHz 8 16 16
1920 by 1080* 71 Hz 84.375 kHz 8 16 16

© 1998 Apple Computer, Inc. - Revised 8/13/98