Technical Product Specification

Technical Reference

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 x4 (2.x/1.x)

• One PCI Express x1 (2.x/1.x)

• One PCI Express Full-/Half-Mini Card (with support for mSATA)

• Three 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.

NOTE

PCI Express 3.0 is only supported by 3

generation Intel Core processor family

processors.

2.2.2.3 Power Supply Connectors

The board has the following power supply connectors:

• Main power – a 2 x 12 connector. This connector is compatible with 2 x 10

connectors previously used on Intel Desktop boards. The board supports the use

of ATX12V power supplies with either 2 x 10 or 2 x 12 main power cables. When

using a power supply with a 2 x 10 main power cable, attach that cable to the main

power connector, leaving pins 11, 12, 23, and 24 unconnected.

• Processor core power – a 2 x 2 connector. This connector provides power

directly to the processor voltage regulator and must always be used. Failure to do

so will prevent the board from booting.

Table 29. Processor Core Power Connector

Signal Name

Ground

3 +12 V 4 +12 V