Dell OptiPlex 330 Mini Tower Desktop Intel Motherboard removed from a working Dell PC. 

Mainboard specs below:

Compatible Part Numbers: KP561, 0KP561, N820C, 0N820C, TW904, 0TW904

CPU

• Socket LGA775

• Intel Core 2 Duo (Dual Core) 

FSB

• 1066/800 MHz

Chipset

• Intel Express G31 Express

Graphics

• Intel GMA 3100 Integrated

Memory

• 240-pin DDR2 DIMM SDRAM  

Supports

• DDR2 667/800 MHz

• non-ECC, un-buffered memory

• Max 4GB

Expansion Slots

• 1x PCI Express x16

• 2x PCI

Storage

• 4x SATA 3Gb/s connectors

Audio

• ADI 1984- High Definition

Ethernet

• Broadcom BCM5787 (Gigabit)

Rear Panel

• 6x USB 2.0 ports

• 1x RJ-45 LAN port

• 2x Serial port

• 1x Parallel port

• 1x VGA port

• 1x Audio I/O

Internal

• 1x 4-pin CPU Fan connector

• 1x 4-pin ATX 12V Power connector

• 1x 24-pin ATX Power connector

• 1x Front Audio header

• 1x Front Panel header

• 1x Clear CMOS jumper

• 1x Password jumper

• 1x USB header

• 1x Floppy Connector