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Table 31.
ATX12V Power Connector
Pin
Signal Name
1
Ground
3
+12 V
Table 32.
Alternate Power Connector
Pin
Signal Name
1
+12 V
2
Ground
3
Ground
4
+5 V
2.8.2.3
Add-in Card Connectors
The 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: the D915PGN board has two PCI Express x1 connectors; the D915PSY board
has one PCI Express x1 connector. The x1 interfaces support simultaneous transfer speeds up
to 500 MBytes/sec.
•
PCI Conventional (rev 2.2 compliant) bus: the D915PGN board has four PCI Conventional bus
add-in card connectors; the D915PSY board has two PCI Conventional 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 Desktop 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.
2.8.2.4
Auxiliary Front Panel Power/Sleep LED Connector
Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector.
Table 33.
Auxiliary Front Panel Power/Sleep LED Connector
Pin
Signal Name
1
HDR_BLNK_GRN
2
Not connected
3
HDR_BLNK_YEL
Pin
Signal Name
2
Ground
4
+12 V
In/Out
Description
Out
Front panel green LED
Out
Front panel yellow LED
Technical Reference
73
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