Dell JT105 Optiplex SX280 LGA775 Motherboard. Dell meets the current and future demands of high performance, power embedded computing, making it ideal for communications, transaction terminal, interactive client, industrial automation applications as well as for standard home use. 

Manufacturer: Dell
Part Number: JT105 0JT105 CN-0JT105
Dell Compatible Part Numbers: U2313 0U2313 D8695 0D8695 UD789 0UD789 HM775 0HM775 DU683 0DU683 WH415 0WH415

Specifications:

8 x USB Ports
4 x Audio Ports
1 x parallel printer port
1 x serial ports
1 x DVI Port
1 x 10/100/1000 Ethernet Port  

Processor

Support for an Intel® Pentium® 4 processor in a LGA775 socket with a 400 / 533 / 800 MHz system bus
Support for an Intel® Celeron® D processor in a LGA775 socket with a 400 / 533 MHz system bus

Memory

Two DDR2 240Pin DIMM sockets
Support for single-sided or double-sided DIMMs (DDR2 533/400/333/266)
2GB Maximum Memory Support ( Dual Channel Mode )
Supports 128MB, 256MB, 512MB or 1GB NON Ecc Memory Sticks

Chipset
 
Intel® 915G Chipset

Sound
 
On Board Sound Blaster emulation Stereo Sound - Line In, Line Out, Microphone

Video
 
On Board Intel 2D/3D Graphics Accelerator DVI-I Output

Compatible Models: 

Dell Optiplex SX280 D8695 HM781 UD789 U2313 Desktop Series