Intel Desktop Board DQ87PG Technical Product Specification
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Table 20. Chassis Intrusion Header
Pin Signal Name
1 Intruder#
2 Ground
Table 21. Processor, Front, and Rear Chassis
(4-Pin) Fan Headers
Pin 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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