Dell GX280



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Sunday, 07 January 2018


Dell™ OptiPlex™ GX280 Mini-Tower Computer Systems User's Guide


Microprocessor type Intel® Pentium® 4 - 2.8 GHz; design provides for future Dell-supported upgrades.
Level 1 (L1) cache 32 KB
Level 2 (L2) cache 1 MB pipelined-burst, eight-way set associative, write-back SRAM



Type 400 & 533 MHz DDR2 SDRAM
Memory connectors 4
Memory capacities 1 GB non-ECC
Minimum memory dual-channel: 256 MB
single-channel: 128 MB
Maximum memory 4 GB
BIOS address F0000h


Computer Information

Chipset Intel Grantsdale
Data bus width 64 bits
Address bus width 32 bits
DMA channels eight
Interrupt levels 24
BIOS chip (NVRAM) 4-Mb
Memory speed 400 & 533 MHz
NIC Integrated network interface with ASF 1.03 support as defined by DMTF.

Capable of 10/100/1000 communication:

  • Green — A good connection exists between a 10-Mbps network and the computer.
  • Orange — A good connection exists between a 100-Mbps network and the computer.
  • Yellow — A good connection exists between a 1 Gb (or 1000-Mbps) network and the computer.
  • Off — The computer is not detecting a physical connection to the network.



Type Integrated Intel Extreme Graphics



Type AC97, Sound Blaster emulation
Stereo conversion 16-bit analog-to-digital; 20-bit digital-to-analog



Drives Two serial ATA controllers supporting one device each and one parallel Ultra ATA/100 IDE supporting two devices per channel with one channel


Expansion Bus

Bus type PCI 2.2
SATA 1.0a
USB 2.0
PCI Express 1.0a
Bus speed PCI: 33 MHz
SATA: 1.5 Gbps
USB: 480 Mbps
PCI Express x1: 5 Gbps
PCI Express x16: 80 Gbps
Mini-Tower full-height cards supported





connector size

120 pins

connector data width (maximum)

32 bits

PCI Express



one x1 and one x16

connector size

36 pins (x1) and 120 pins (x16)

connector date width (maximum)

one PCI Express lane (x1) and 16 PCI Express lanes (x16)



Externally accessible:

one 3.5-inch drive bay
two 5.25-inch drive bays

Internally accessible:

two bays for 1-inch high hard drives



External connectors:


9-pin connector; 16550C-compatible


25-hole connector (bidirectional)


15-hole connector

Network adapter

RJ45 connector

Optional PS/2 with secondary serial port adapter

Two 6-pin mini-DINs


Two front-panel and six back-panel USB 2.0–compliant connectors


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

Two 7-pin connectors

Floppy drive

34-pin connector


12-pin connector for optional second serial port card


5-pin connector

PCI 2.2

120-pin connector

CD drive audio interface

4-pin connector

Front audio

10-pin connector (For the optional audio customer kit)

Front panel

40-pin connector


Key Combinations

<Ctrl><Alt><Del> If running Microsoft® Windows® XP, brings up the Windows Security window. If in MS-DOS® mode, restarts (reboots) the computer
<F2> or <Ctrl><Alt><Enter> starts embedded system setup (during start-up only)
<Ctrl><Alt><b> 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)
<F12> or <Ctrl><Alt><F8> 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


Controls and Lights

Power control Push button
Power light Green light—blinking green in sleep state; solid green for power-on state

Amber light—blinking amber indicates a problem with an installed device; solid amber indicates an internal power problem (see Power Problems)

Hard-drive access light Green
Link integrity light (on integrated network adapter) Green light for 10-Mb operation; orange light for 100-Mb operation; yellow light for a 1000-Mb (1-Gb) operation
Activity light (on integrated network adapter) Yellow blinking light
Diagnostic lights Four lights on the front panel
Standby power light AUX_PWR on the system board



DC power supply:


305 W

Heat dissipation

150W max


Fixed-voltage power supply—110 V at 50/60 Hz

Manual selection and auto-sensing power supplies—90 to 135 V at 50/60 Hz; 180 to 265 V at 50/60 Hz; 100 V at 50/60 Hz for Japanese computers

Backup battery 3-V CR2032 lithium coin cell




41.4 cm (16.3 inches)


18.5 cm (7.3 inches)


43.9 cm (17.3 inches)


12.34 kg (27.2 lbs)





10° to 35°C (50° to 95°F)

NOTE: At 35°C (95°F), the maximum operating altitude is 914 m (3000 ft).


–40° to 65°C (–40° to 149°F)
Relative humidity 20% to 80% (noncondensing)
Maximum vibration:


0.25 G at 3 to 200 Hz at 0.5 octave/min


0.5 G at 3 to 200 Hz at 1 octave/min
Maximum shock:


Bottom half-sine pulse with a change in velocity of 20 inches/sec (50.8 cm/sec)


27-G faired square wave with a velocity change of 200 inches/sec (508 cm/sec)


–15.2 to 3048 m (–50 to 10,000 ft)


–15.2 to 10,668 m (–50 to 35,000 ft)






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