Dell OptiPlex 755 User Manual page 134

Expansion Bus
Bus type
Bus speed
Cards:
PCI:
connectors
connector size
connector data width
(maximum)
PCI Express:
connectors
power
connector size
connector data width (maximum)
Drives
Internally accessible
Externally accessible
Connectors
External connectors:
Serial
Parallel
Video
Network adapter
Optional PS/2 with secondary
serial port adapter
USB
Audio
System board connectors:
SATA
eSATA
Floppy drive
Serial
Fan
PCI 2.2
PCI Express
Front panel
Key Combinations
<Ctrl><Alt><Del>
<F2> or <Ctrl><Alt><Enter>
<F3>
PCI 2.3
PCI Express 1.0A
SATA 1.0A and 2.0
USB 2.0
PCI: 133 MB/s
PCI Express x16: 8 GB/s bidirectional speed
PCI Express x1: 5 Gbps
SATA: 1.5 Gbps and 3.0 Gbps
USB: 480 Mbps
full-height cards supported
two
two 164 pin connectors
32 bits
one x1 and one x16
10 W (x1) and 75 W (x16) maximum
36 pins (x1) and 164 pins (x16)
one PCI Express lane (x1) and 16 PCI Express lanes
(x16)
Two SATA (Serial ATA) hard drives
l
One3.5-inch floppy drive or media reader
l
Two SATA optical drives
l
One eSATA drive (optional)
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
four 7-pin connectors
one 7-pin connector
34-pin connector
12-pin connector for optional second PS/2 serial port
card
5-pin connector
three 120-pin connectors
one 120-pin (x16) connector
40-pin connector
In Microsoft® Windows® XP, brings up the Windows
Security window. If in MS-DOS® mode, restarts
(reboots) the computer.
starts embedded system setup (during start-up only)
automatically starts the computer from the network
environment specified by the remote boot
environment (PXE) rather than from one of the
devices in the system setup Boot Sequence option