Dell OptiPlex GN/GN+
Logs
chipChipset
cpuSocket
Socket 7 (PGA321)
speedFSB speed
66MHz
moboForm factor
OEM / Proprietary
dimDimensions
305mm x 244mm
ramMax VRAM size
2MB
chipCache
256KB512KB
ramMax RAM size
256MB
ramRAM types
SDR UDIMM168-pin EDO UDIMM
pwrPSU connector
DELL (20-pin)
tag Also known as
  • Dell System Thredbo (BIOS name)
connI/O ports
1x 
Floppy interface
2x 
IDE interface
1x 
PS/2 keyboard
1x 
PS/2 mouse
1x 
Parallel
2x 
Serial
1x 
VGA
cardExpansion slots
3x 
16-bit ISA
3x 
32-bit PCI
wrench Known issues
  • Proprietary power supply connector

Some or all versions of this motherboard use a non-standard power supply connector, limiting compatibility with power supplies. It is highly advised to NOT apply power to the board prior to checking the connector pinouts and ensuring they are compatible. Failure to do so can permanently damage both the motherboard and the power supply.

We invite you to join our Discord community for assistance in repairing the damage or locating a compatible power supply.

  • Expansion slots are on proprietary riser

The listed slots are on the riser card that came with the motherboard.
If you have this board make sure you have the riser for it.

Last updated 2026-02-23T15:33:17Z
Board info score is 8.1/10
bios 5 BIOS files available

vendor Phoenix - 5 entries

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
Note
Core version
Dell
BIOS version
Logs
POST string
Note
Core version
Dell
BIOS version
Logs
POST string
Note
Core version
Dell
BIOS version
Logs
POST string
Note
Core version
Dell
BIOS version
Logs
POST string
Note
Core version
Dell
BIOS version
Logs
drv 12 drivers available
Name
Version
OS support
Size
Filename
Name
Version
3.00
OS support
OS/2 Warp 3.x Windows NT 3.5x Windows NT 4.0
Size
1.2MB
Filename
Name
Version
3.00
OS support
OS/2 Warp 3.x Windows NT 3.5x Windows NT 4.0
Size
1.2MB
Filename
Name
Version
3.3.0.2
OS support
Windows 9x
Size
569.7KB
Filename
Name
Version
3.02.0.0
OS support
Windows 9x
Size
577.8KB
Filename
Name
Version
3.40.1001
OS support
Windows 2000 Windows 9x Windows XP/2k3
Size
2.2MB
Filename
Name
Version
2.80
OS support
Windows 2000 Windows 9x
Size
1.5MB
Filename
Name
Version
2.80
OS support
Windows 2000 Windows 9x
Size
1.5MB
Filename
Name
Version
2.41.07
OS support
Windows 9x
Size
183.6KB
Filename
Name
Version
2.00.18
OS support
Windows NT 4.0
Size
177.7KB
Filename
Name
Version
1.12.000
OS support
Windows 9x
Size
841.8KB
Filename
Name
Version
Empty
OS support
Windows 3.1x Windows 9x Windows NT 3.5x Windows NT 4.0
Size
14.6MB
Filename
Name
Version
3.7B / 3.7D
OS support
MS-DOS NetWare Server 3 NetWare Server 4 OS/2 Warp 3.x Windows 3.1x Windows 9x Windows NT 3.5x
Size
1.6MB
Filename
image1 Image 1 of 1 (Microhouse)

Disclaimer

The info found in this page might not be entirely correct. Check out this guide to learn how you can improve it.