Intel Q67 User Manual page 17

(2) ATX 12V Power Connector (8-pin block): ATX12V
This is a new defined 8-pin connector that usually comes with ATX Power
Supply. The ATX Power Supply which fully supports AMD AM3 processor must
including this connector for support extra 12V voltage to maintain system power
consumption. Without this connector might cause system unstable because the
power supply can not provide sufficient current for system.
(3) Serial-ATAII Port connector: SATA1_2/SATA3_4/SATA5
This connector supports the provided Serial ATA3 hard disk cable to connecting
the motherboard with SATA2 hard disk.
Pin 1
Pin No. Defnition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
13