Intel H110 Express Technical Manual page 21

(4) ATX12V1 (4-pin block): ATX12V Type Power Connector
(5) SATA1/SATA2 (7-pin): SATA III Port connector
SATA1&SATA2 are high-speed SATAIII port that supports 6 GB/s transfer rate.
Pin No. Defnition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
16