ASROCK Z790 Steel Legend WiFi User Manual page 38

USB 2.0 Headers
(9-pin USB_1_2) (see p.7, No. 29)
(5-pin USB_3) (see p.7, No. 12)
There are two headers on this motherboard.
USB_1_2
USB_PWR
1
USB_PWR
34
P-
P+
GND
DUMMY
GND
P+
P-
USB_3
GND
P+
P-
USB_PWR
1