Dell OptiPlex GX520 - Manual (Page 183)

Expansion Bus
Bus type PCI 2.2
SATA 1.0a and 2.0
USB 2.0
Bus speed PCI: 33 MHz
SATA: 1.5 and 3.0 Gbps
USB: 480 Mbps
Cards: low-profile cards supported
PCI:
connector one
connector size 120 pins
connector data width (maximum) 32 bits
Drives
Externally accessible one bay for a slimline floppy drive;
one bay for a slimline CD/DVD drive
Internally accessible one bay for a 1-inch-high hard drive
Connectors
External connectors:
Serial 9-pin connector; 16550C-compatible
Parallel 25-hole connector (bidirectional)
Video 15-hole VGA connector
Network adapter RJ45 connector
USB two front-panel and six back-panel USB 2.0–
compliant connectors
Audio three connectors for line-in, line-out, and microphone;
one front-panel connector for headphones
System board connectors:
Primary IDE drive 40-pin connector
Serial ATA 7-pin connector
Floppy drive 34-pin connector
Serial 12-pin connector for optional second serial port card
Fan 5-pin connector
PCI 2.2 120-pin connector
CD drive audio interface 4-pin connector
Front panel 40-pin connector
Key Combinations
in Microsoft® Windows® XP, brings up the Windows
Security window; in MS-DOS® mode, restarts
(reboots) the computer
or starts embedded system setup (during system 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 system start-up only)
or displays a boot device menu that allows the user to
enter a device for a single boot (during system start-
up only) as well as options to run hard-drive and
system diagnostics
Controls and Lights
Power control push button
Power light green light — Blinking green indicates sleep mode;
solid green indicates power-on state.