ASROCK B450 Pro4 Manual page 31

Power LED and Speaker
Header
(7-pin SPK_PLED1)
(see p.1, No. 15)
Serial ATA3 Connectors
(SATA3_1:
see p.1, No. 9)
(SATA3_2:
see p.1, No. 8)
(SATA3_3:
see p.1, No. 13)
(SATA3_4:
see p.1, No. 14)
(SATA3_A1:
see p.1, No. 11)
(SATA3_A2:
see p.1, No. 12)
USB 2.0 Headers
(9-pin USB_1_2)
(see p.1, No. 22)
(9-pin USB_3_4)
(see p.1, No. 21)
USB 3.1 Gen1 Header
(19-pin USB3_5_6)
(see p.1, No. 7)
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_PB_SSRX+
IntA_PA_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, SATA3_3 and
SATA3_4 share lanes. If
either one of them is in
use, the others will be
disabled.
* To minimize the boot
time, use AMD SATA
ports (SATA3_1~4) for
your bootable devices.
There are two headers
on this motherboard.
Each USB 2.0 header can
support two ports.
There is one header on
this motherboard. Each
USB 3.1 Gen1 header can
support two ports.
B450 Pro4
29