Dell OptiPlex 745 - Manual (Page 114)

Bus type PCI 2.3
PCI Express 1.0A
SATA 1.0A and 2.0
USB 2.0
Bus speed 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
Cards: full-height cards supported
PCI:
connectors two
connector size 120 pins
connector data width
(maximum)
32 bits
PCI Express:
connectors one x1 and one x16
power 10 W (x1) and 75 W (x16) maximum
connector size 36 pins (x1) and 120 pins (x16)
connector data width (maximum) one PCI Express lane (x1) and 16 PCI Express lanes
(x16)
Drives
Externally accessible one 3.5-inch drive
two 5.25-inch drive bays
Internally accessible two bays for 1-inch-high hard drives
Connectors
External connectors:
Serial 9-pin connector; 16550C-compatible
Parallel 25-hole connector (bidirectional)
Video 15-hole VGA connector
Network adapter RJ45 connector
Optional PS/2 with secondary serial port
adapter two 6-pin mini-DINs
USB two front-panel and six back-panel USB 2.0–
compliant connectors
Audio two connectors for line-in/ microphone and line-out;
two front-panel connectors for headphones and
microphone
System board connectors:
SATA four 7-pin connectors
internal USB 10-pin header for optional Media Card Reader (3.5-
inch bay device)
Floppy drive 34-pin connector
Serial 12-pin connector for optional second serial port card
Fan 5-pin connector
PCI 2.2 two 120 -pin connectors
Front panel 40-pin connector
Key Combinations
If you are running Microsoft® Windows® XP, brings
up the Windows Security window. If in MS-DOS®
mode, restarts (reboots) the computer.
or 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
(during start-up only)
or displays a boot device menu that allows the user to
enter a device for a single boot (during start-up only)
as well as options to run hard-drive and system
diagnostics