Dell OptiPlex 790 Owner's Manual page 88

Drives
Small Form Factor
Ultra Small Form Factor
2.5–inch SATA drive bays
Mini-Tower
Desktop
Small Form Factor
Ultra Small Form Factor
External Connectors
Audio:
Back Panel
Front Panel
Network Adapter
Serial
Parallel
USB 2.0
Mini-Tower, Desktop, Small Form
Factor
Ultra Small Form Factor
Video
NOTE: Available video connectors may vary based on the graphics card
selected.
88
one
none
two
one
one
one
two connectors for line-out and line-in/
microphone
two connectors for microphone and
headphone
one RJ45 connector
one 9-pin connector; 16550C compatible
one 25-pin connector (optional for mini-
tower)
Front Panel: 4
Back Panel: 6
Front Panel: 2
Back Panel: 5
15-pin VGA connector, 20-pin DisplayPort
connector