Intel H110 Technical Manual page 22

(6) SATA1/SATA2 (7-pin): SATA III Port connector
SATA1&SATA2 are high-speed SATAIII port that supports 6 GB/s transfer rate.
(7) CPUFAN1/SYSFAN1 (4-pin): Fan Connector
Pin No. Defnition
1 GND
2 TXP
3 TXN
4 GND
5 RXN
6 RXP
7 GND
(2.54 pitch)
+12V Fan Power
Pin1
CPUFAN1
17
Control
Fan Speed
GND
Pin1
SYSFAN1