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Intel® Desktop Board D925XHY
Connectors
This section describes the board's connectors. The connectors can be divided into these groups:
Back Panel I/O Connectors
Component-side I/O Connectors
Add-in Card Connectors
Front Panel Connector
Front Panel USB Connectors
Front Panel IEEE 1394a Connectors

CAUTION
Only the following connectors have overcurrent protection: back panel USB, front panel USB, and PS/2*.

The other internal connectors are not overcurrent protected and should connect only to devices inside the computer's chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer's chassis. A fault in the load presented by the external devices could cause damage to the computer, the power cable, and the external devices themselves.

Back Panel Connectors
The figure below shows the location of the back panel connectors. The back panel connectors are color-coded. The figure legend below lists the colors used (when applicable).

D925XHY Back Panel Connectors

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.

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

Component-side I/O Connectors

The figure below shows the location of the component-side connectors.

D925XHY Component-side Connectors
Item Description
A PCI Conventional* bus add-in card connector 4
B Auxiliary rear fan connector
C PCI Conventional bus add-in card connector 3
D PCI Express* x1 bus add-in card connector 2
E PCI Express x1 bus add-in card connector 1
F Front panel audio connector
G PCI Conventional bus add-in card connector 2
H Front panel IEEE-1394a connector
I PCI Conventional bus add-in card connector 1
J Front panel IEEE-1394a connector
K PCI Express x16 bus add-in card connector
L Rear chassis fan connector
M Alternate power connector
N +12V power connector (ATX12V)
O Processor fan connector
P Power connector
Q Diskette drive connector
R Parallel ATA IDE connector
S Chassis intrusion connector
T Front chassis fan connector
U Serial ATA connector 1
V Serial ATA connector 3
W Serial ATA connector 2
X Serial ATA connector 0
Y Auxiliary front panel power LED connector
Z Front panel connector
AA Front panel USB connector
BB Front panel USB connector

Add-in Card Connectors
The board has the following add-in card connectors:
One PCI Express* x16 connector supporting simultaneous transfer speeds up to 4 GBytes/sec of peak bandwidth per direction and up to 8 GBytes/sec concurrent bandwidth.
Two PCI Express x1 connectors. The x1 interfaces support simultaneous transfer speeds up to 250 MBytes/sec of peak bandwidth per direction and up to 500 MBytes/sec concurrent bandwidth.
Four PCI Conventional* (rev 2.2 compliant) 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 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

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

D925XHY Front Panel

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.

D925XHY Front Panel USB Connector

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

D925XHY IEEE1394a Connector

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 D925XHY Technical Product Specification

Updated: Monday, March 6, 2006

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