Apple Power Macintosh 7100/80AV - Manual (Page 27)

Specifications I/O Interfaces - 8
Video
One HDI-45 DRAM-based video port on logic board supports
direct connection to Apple AudioVision monitors and with
optional HDI-45 to DB-15 adapter supports 12", 13", 14",
15" portrait, 16", and 17" monitors
7100/66 & 7100/80:
Also has a Power Macintosh 2 MB Video Card with one DB-15
VRAM-based video port that supports 12", 13", 14", 15"
portrait, 16", and 17", 20", and 21" monitors
7100/66AV & 7100/
80AV:
Also has a Power Macintosh AV Card with the following: one DB-
15 VRAM-based video port that supports 12", 13", 14", 15"
portrait, 16", and 17", 20", and 21" monitors; one S-video/
composite input port; and one S-video composite output port
Note
: Only one monitor can be attached to the card at one time
(that is, either through the DB-15 port or the S-video port).