DB43LD Technical Product Specification

Technical Reference

Table 16. Chassis Intrusion Header

Pin Signal Name

1 Intruder

2 Ground

Table 17. Front, Rear, and Processor (4-Pin) Fan Header

Pin Signal Name

1 Ground

2 +12 V

3 FAN_TACH

4 FAN_CONTROL

2.2.2.2 Add-in Card Connectors

The board has the following add-in card connectors:

• PCI Express x16:

⎯ Supports PCI Express GEN1 frequency of 1.25 GHz resulting in 2.5 Gb/s each

direction (500 MB/s total). Maximum theoretical bandwidth on interface of

4 GB/s in each direction simultaneously, for an aggregate of 8 GB/s when

operating in x16 mode.

⎯ Supports PCI Express GEN2 frequency of 2.5 GHz resulting in 5.0 Gb/s each

direction (1000 MB/s total). Maximum theoretical bandwidth on interface of

8 GB/s in each direction simultaneously, for an aggregate of 16 GB/s when

operating in x16 mode.

• PCI Express x1: one PCI Express x1 connector. The x1 interface supports

simultaneous transfer speeds up to 250 MB/s of peak bandwidth per direction and

up to 500 MB/s concurrent bandwidth

• PCI Conventional (rev. 2.3 compliant) bus: two PCI Conventional bus add-in card

connectors.

Note the following considerations for the PCI Conventional bus connectors:

• The PCI Conventional bus connectors are bus master capable.

• SMBus signals are routed to the PCI Conventional bus connectors. This enables

PCI Conventional 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.