Asus RS520-X5/PS8 - Manual (Page 47)

ASUS RS520-X5/PS8 4-5
2. LAN bandwidth setting (3-pin LAN_BW1)
This jumper allows you to set the LAN bandwidth setting for more efficient IP
load distribution.
3. VGA controller setting (3-pin VGA_EN1)
These jumpers allow you to enable or disable the onboard VGA controller.
Set to pins 1-2 to activate the VGA feature.