Table 18. Processor (4-Pin) Fan Header
Pin
Signal Name
1
Ground
2
+12 V
3
FAN_TACH
4
FAN_CONTROL
Table 19. Front and Rear Chassis Fan Headers
Pin
4-Wire Support
1
Ground
2
+12 V
3
FAN_TACH
4
FAN_CONTROL
Table 20. Front Panel IEEE 1394a Header
Pin
Signal Name
1
Data A (positive)
3
Ground
5
Data B (positive)
7
+12V_DC
9
Key (no pin)
Note: The +12 V DC power on the IEEE 1394a header is fused.
2.2.2.2
Add-in Card Connectors
The board has the following add-in card connectors:
•
One PCI Express 2.0 x16: this connector supports simultaneous transfer speeds of
up to 8 GB/s of peak bandwidth per direction.
•
PCI Express 2.0 x4: one PCI Express 2.0 x4 connector. The x4 interface supports
simultaneous transfer speeds up to 500 MB/s of peak bandwidth per direction and
up to 4 GB/s concurrent bandwidth.
•
PCI Express 2.0 x1: one PCI Express 2.0 x1 connector. The x1 interface supports
simultaneous transfer speeds up to 1 GB/s of peak bandwidth per direction and up
to 2 GB/s concurrent bandwidth.
•
One Conventional PCI (rev 2.3 compliant) connector.
Note the following considerations for the Conventional PCI bus connector:
•
The Conventional PCI bus connector is bus master capable.
•
SMBus signals are routed to the Conventional PCI bus connector. This enables
Conventional PCI bus add-in boards with SMBus support to access sensor data on
the desktop 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.
Pin
3-Wire Support
3
Ground
2
FAN_POWER
1
FAN_TACH
N/A
N/A
Pin
Signal Name
2
Data A (negative)
4
Ground
6
Data B (negative)
8
+12 V_DC
10
Ground
Technical Reference
49