Table 15. Main Power Connector; Table 16. Atx12V Power Connector - Intel BLKD945GCLF - MB 533FSB DDR2 667 533 Aud+Vdo+Lan mATX Technical Product Specification

2.2.2.2 Add-in Card Connectors
The board has one PCI Conventional (rev 2.3 compliant) bus add-in card connector.
PCI Conventional bus add-in cards with SMBus support can access sensor data and
other information residing on the board.
Note the following considerations for the PCI Conventional bus connectors:
• The PCI Conventional bus connector is bus master capable.
• SMBus signals are routed to the PCI Conventional bus connector. This enables PCI
Conventional bus add-in boards with SMBus support to access sensor data on the
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.
2.2.2.3 Power Supply Connectors
The board has the following power supply connectors:
• Main power – a 2 x 10 connector. The board supports the use of ATX12V power
supplies with 2 x 10 or 2 x 12 main power cables.
• ATX12V 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 15. Main Power Connector

Pin Signal Name
1 +3.3 V
2 +3.3 V
3 Ground
4 +5 V
5 Ground
6 +5 V
7 Ground
8 PWRGD (Power Good)
9 +5 V (Standby)
10 +12 V

Table 16. ATX12V Power Connector

Pin Signal Name
1 Ground
3 +12 V
For information about
Power supply considerations
Pin Signal Name
11 +3.3 V
12 -12 V
13 Ground
14 PS-ON# (power supply remote on/off)
15 Ground
16 Ground
17 Ground
18 +5 V
19 +5 V
20 +5 V
Pin Signal Name
2 Ground
4 +12 V
Refer to
Section 2.5.1, page 51
Technical Reference
45