ASRock B550 Pro4 User Manual - Page 15
I/O Panel, Description, Activity / Link LED, Speed LED, Status, Function
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1.4 I/O Panel 1 2 B550 Pro4 5 3 4 6 12 11 10 9 8 7 No. Description No. Description 1 PS/2 Mouse/Keyboard Port 7 Microphone (Pink)** 2 D-Sub Port 8 USB 3.2 Gen1 Ports (USB3_5_6) 3 USB 3.2 Gen2 Type-A Port (USB31_ TA_1) 9 USB 3.2 Gen2 Type-C Port (USB31_ TC_1) 4 LAN RJ-45 Port* 10 Antenna Bracket 5 Line In (Light Blue)** 11 HDMI Port 6 Front Speaker (Lime)** 12 USB 3.2 Gen1 Ports (USB3_1_2) * There are two LEDs on each LAN port. Please refer to the table below for the LAN port LED indications. ACT/LINK LED SPEED LED LAN Port Activity / Link LED Status Description Off Blinking On No Link Data Activity Link Speed LED Status Off Orange Green Description 10Mbps connection 100Mbps connection 1Gbps connection ** Function of the Audio Ports in 7.1-channel Configuration: Port Light Blue (Rear panel) Lime (Rear panel) Pink (Rear panel) Lime (Front panel) Function Rear Speaker Out Front Speaker Out Central /Subwoofer Speaker Out Side Speaker Out 9 English