Back Panel Connectors Component-side Connectors Add-in Card Connectors

Front Panel Connector Front Panel USB Connectors Front Panel IEEE 1394a Connectors

Back Panel Connectors

Item Description Color A PS/2* mouse port Green B PS/2 keyboard port Purple C Serial port A Teal D Parallel port (optional) Burgundy E VGA port   F IEEE-1394a connector   G USB ports (two)   H LAN   I USB ports (two)   J Center channel and LFE (subwoofer) audio out/Retasking Jack Orange K Surround left/right channel audio out/Retasking Jack Black L Audio line in/Retasking Jack Blue M Digital audio out optical   N Mic in/Retasking Jack Pink O Front left/right channel audio out/Two channel audio line out/Retasking Jack Lime green

Note The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.

Component-side Connectors

The figure below shows the location of the component-side connectors. The table below lists the component-side connectors identified in the figure.

Item Description A Rear chassis fan connector B Front panel audio connector C Parallel ATA IDE connector D Chassis intrusion connector E Serial ATA connector 0 F Serial ATA connector 1 G Serial ATA connector 2 H Serial ATA connector 3 I Front panel USB connector J Front panel USB connector K Main power connector L PCI Express* x16 bus add-in card connector M PCI Conventional* bus add-in card connector 1 N PCI Conventional bus add-in card connector 2 O PCI Express x1 bus add-in card connector P Diskette drive connector Q Front panel IEEE-1394a connector R Front panel IEEE-1394a connector S Front panel connector T Front chassis fan connector U Auxiliary front panel power LED connector V Processor core power connector W Processor fan connector

Add-in Card Connectors

This board has the following add-in card connectors:

	PCI Express* x16: one connector supporting simultaneous transfer speeds up to 8 GBytes/sec.
	PCI Express x1: one PCI Express x1 connector. The x1 interface supports simultaneous transfer speeds up to 500 MBytes/sec.
	PCI Conventional* (rev 2.3 compliant) bus: two PCI Conventional bus add-in card connectors. The SMBus is routed to PCI Conventional bus connector 2 only. PCI Conventional bus add-in cards with SMBus support can access sensor data and other information residing on the board.

Note the following considerations for the PCI Conventional bus connectors:

	All of the PCI Conventional bus connectors are bus master capable.
	SMBus signals are routed to PCI Conventional bus connector 2. This enables PCI Conventional bus add-in boards with SMBus support to access sensor data on the board. The specific SMBus signals are as follows:
	The SMBus clock line is connected to pin A40.
	The SMBus data line is connected to pin A41.

Note The PCI Express x16 connector is configured to support only a PCI Express x1 link when the Intel® GMA950 graphics controller is enabled.

Front Panel Connector

This section describes the functions of the front panel connector. The table below lists the signal names of the front panel connector. The figure below is a connection diagram for the front panel connector.

Pin Signal In/Out Description Pin Signal In/Out Description Hard Drive Activity LED [Yellow] Power LED [Green] 1 HD_PWR Out Hard disk LED pull-up (750 ohm) to +5 V 2 HDR_BLNK_GRN Out Front panel green LED 3 HAD# Out Hard disk active LED 4 HDR_BLNK_YEL Out Front panel yellow LED Reset Switch [Purple] On/Off Switch [Red] 5 Ground   Ground 6 FPBUT_IN In Power switch 7 FP_RESET# In Reset switch 8 Ground   Ground Power Not Connected 9 +5 V   Power 10 N/C   Not connected

Front Panel USB Connectors

The figure below is a connection diagram for the front panel USB connectors.

Integrator's Notes The +5 V DC power on the USB connector is fused. Pins 1, 3, 5, and 7 comprise one USB port. Pins 2, 4, 6, and 8 comprise one USB port. Use only a front panel USB connector that conforms to the USB 2.0 specification for high-speed USB devices.

Front Panel IEEE 1394a Connectors

The figure below is a connection diagram for the IEEE 1394a connectors.

Integrator's Notes The IEEE 1394a connector is colored blue. The +12 V DC power on the IEEE 1394a connector is fused. Each IEEE 1394a connector provides one IEEE 1394a port.

For more information about the connectors, see the Intel® Desktop Board D945GBO Technical Product Specification

Updated: Thursday, January 5, 2006