Asus P5BW-BTX Rev 1.05 Series Intel Socket LGA775 Genuine Desktop Motherboard.

Asus Part Number: P5BW-BTX Rev 1.05
Compatible Part Numbers: 60-MBB417-0A
Compatible Models: HP Compaq DC5700 Series

Back I/O Ports:

1 x PS/2 keyboard (purple)
1 x PS/2 mouse (green)
1 x VGA port
1 x D-E-9 Serial
1 x DB-25F Parallel port
1 x LAN (RJ45) port
6 x USB 2.0 
2 x Audio jack