Asus PRIME Z490-A - CPU over Voltage Jumper; Front Panel Audio Header

PRIME Z490-A
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Chapter 1
14. COM Port connector
The COM (Serial) Port connector allows you to connect a COM port module. Connect
the COM port module cable to this connector, then install the module to a slot opening
on the system chassis.
The COM port module is purchased separately.
15. CPU Over Voltage jumper
The CPU Over Voltage jumper allows you to set a higher CPU voltage for a flexible
overclocking system (depending on the type of the installed CPU). Set to pins 2-3 to
increase the CPU voltage setting, or set to pins 1-2 to use the default CPU voltage
setting.