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

Front Panel Connector Front Panel USB Connector Front Panel IEEE 1394a Connector (Optional)

Back Panel Connectors

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 PCI Express* x1 bus add-in card connector B Front panel audio connector C PCI Conventional* bus add-in card connector 2 D PCI Conventional bus add-in card connector 1 E PCI Express x16 bus add-in card connector F Rear chassis fan connector G +12V power connector (ATX12V) H Processor fan connector I Power connector J Diskette drive connector K Parallel ATA IDE connector L Serial ATA connector 3 M Front chassis fan connector N Serial ATA connector 2 O Serial ATA connector 0 P Auxiliary front panel power LED connector Q Front panel connector R Serial ATA connector 1 S Front panel USB connector T Chassis intrusion connector U Front panel USB connector V Front panel IEEE-1394a connector W Front panel IEEE-1394a 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 (ATX expansion slot 6). 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 boards. 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 optional IEEE 1394a connectors.

Integrator's Notes The IEEE 1394a connectors are colored blue. The +12 V DC power on the IEEE 1394a connectors is fused. Each IEEE 1394a connector provides one IEEE 1394a port. For more information about the connectors, see the Intel® Desktop Board D945GPM Technical Product Specification Updated: Thursday, January 5, 2006