ASROCK B550M Steel Legend User Manual page 34

Power LED and Speaker
Header
(7-pin SPK_PLED1)
(see p.7, No. 18)
Serial ATA3 Connectors
(SATA3_1:
see p.7, No. 12)
(SATA3_2:
see p.7, No. 11)
(SATA3_3:
see p.7, No. 14)
(SATA3_4:
see p.7, No. 13)
(SATA3_5:
see p.7, No. 15)
(SATA3_6:
see p.7, No. 16)
USB 2.0 Headers
(9-pin USB_3_4)
(see p.7, No. 23)
(9-pin USB_5_6)
(see p.7, No. 24)
USB 3.2 Gen1 Headers
(19-pin F_USB3_1_2)
(see p.7, No. 10)
28
SPEAKER
DUMMY
DUMMY
+5V
1
PLED+
PLED+
PLED-
USB_PWR
P-
P+
GND
DUMMY
1
GND
P+
P-
USB_PWR
Vbus Vbus
Vbus IntA_PB_SSRX-
IntA_PA_SSRX- IntA_PB_SSRX+
IntA_PA_SSRX+ GND
GND IntA_PB_SSTX-
IntA_PA_SSTX- IntA_PB_SSTX+
IntA_PA_SSTX+
GND
GND IntA_PB_D-
IntA_PA_D- IntA_PB_D+
IntA_PA_D+ Dummy
1
Please connect the
chassis power LED and
the chassis speaker to this
header.
These six SATA3
connectors support SATA
data cables for internal
storage devices with up to
6.0 Gb/s data transfer rate.
* M2_2 and SATA3_5_6
share lanes. If either one
of them is in use, the other
one will be disabled.
There are two headers
on this motherboard.
Each USB 2.0 header can
support two ports.
There are two headers on
this motherboard. Each
USB 3.2 Gen1 header can
support two ports.