22
Rear I/O Panel
Rear I/O Panel
Audio Ports**
Optical S/PDIF-Out**
Link/ Activity LED
Status Description
Off No link
Yellow Linked
Blinking Data activity
Speed LED
Status Description
Off 10 Mbps connection
Green 100 Mbps connection
Orange 1 Gbps connection
LAN Port LED Status Table
LAN*
WiFi Antenna 
Connectors
USB 3.1 Gen1 Type-A** 
(VR READY ports)
USB 3.1 Gen1 Type-A*** 
USB 3.1 Gen1 
Type-A** 
USB 3.1 Gen1 Type-A* 
USB 3.1 Gen1 Type-C*
BIOS 
FLASHBACK+ 
button
BIOS FLASHBACK+ port
Clear CMOS 
button
 y Clear CMOS button - Power off your computer. Press and hold the Clear CMOS 
button for about 5-10 seconds to reset BIOS to default values.
 y BIOS FLASHBACK+ port/ button - Please refer to page 60 for Updating BIOS with 
BIOS FLASHBACK+.
* Controlled by Promontory.
** For 2990WX processor, these ports are controlled by Die 0. 
***  For 2990WX processor, these ports are controlled by Die 1. 
Audio Ports Configuration
Audio Ports
Channel
2 4 6 8
Center/ Subwoofer Out ● ●
Rear Speaker Out ● ● ●
Line-In/ Side Speaker Out ●
Line-Out/ Front Speaker Out ● ● ● ●
Mic In
(●: connected, Blank: empty)