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Intel Desktop Board DQ87PG Technical Product Specification

Table 20. Chassis Intrusion Header

Pin Signal Name

1 Intruder#

2 Ground

Table 21. Processor, Front, and Rear Chassis

(4-Pin) Fan Headers

Signal Name

1 Ground

(Note)

2 +12 V

3 FAN_TACH

4 FAN_CONTROL

Note: These fan headers use Pulse Width Modulation control for fan speed.

Table 22. Internal Mono Speaker Header

Pin Signal Name

1 −

2 +

2.2.2.2 Add-in Card Connectors

The board has the following add-in card connectors:

• One PCI Express x16 (3.0/2.x/1.x)

• One PCI Express x1 (2.x/1.x)

• Two Conventional PCI (rev 2.3)

Note the following considerations for the Conventional PCI bus connectors:

• The Conventional PCI bus connectors are bus master capable.

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

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