Dell OptiPlex 755 User Manual page 100

Drives
Externally accessible
Internally accessible
Connectors
External connectors:
Serial
Parallel
Video
Network adapter
Optional PS/2 with secondary serial
port adapter
USB
Audio
System board connectors:
SATA
eSATA
Internal USB
Floppy drive
Serial
Fan
PCI Express
PCI 2.3
Front panel
100
Desktop Computer Specifications
one One eSATA drive (optional)
• two SATA (Serial ATA) hard drives
• one3.5-inch floppy drive or media card reader
• one SATA optical drive
9-pin connector; 16550C-compatible
25-pin connector (bidirectional)
15-pin VGA connector
RJ45 connector
two 6-pin mini-DINs
two front-panel and six back panel USB 2.0–compliant connectors
two connectors for line-in/ microphone and line-out; two front-
panel connectors for headphones and microphone
three 7-pin connectors
one 7-pin connector
10-pin header for optional media card reader (in 3.5-inch drive bay)
34-pin connector
12-pin connector for optional secondary PS/2 serial port card
5-pin connector
one 120-pin (x16) connector
two 120-pin connectors
40-pin connector