ASROCK Z87 OC Formula ac User Manual page 21

No. Description
34 Chassis Fan Connector (CHA_FAN2)
35 Clear CMOS Jumper (CLRCMOS1)
36 USB 2.0 Header (USB4_5)
37 Chassis Fan Connector (CHA_FAN1)
38 COM Port Header (COM1)
39 SLI/XFIRE Power Connector (SLI/XFIRE_PWR1)
40 Front Panel Audio Header (HD_AUDIO1)
41 Power Fan Connector (PWR_FAN1)
42 Chassis Fan Connector (CHA_FAN4)
43 MOS Fan Connector (MOS_FAN1)
44 Twin-Power Cooling
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