A CPU fan header is where you plug the fan.
The CPU fan header is important for it can detect whether your fan is working or not.
CPU fan not spinning?
Check the 4 solutions in this tutorial to fix CPU fan not running problem.
What Is CPU OPT?
CPU opt meaning is CPU optional.
It is a header that is used to connect some jot down of wiring for a liquid cooling system.
Once connected, you are able to control the speed of the fan from the motherboard.
Most gaming motherboards are equipped with such CPU OPT for controlling the heat sink speed.
Some heatsinks may pair with 2 fans or may have clips on both sides.
In general, CPU OPT is an additional CPU fan header.
Since it is additional, it is not necessary and the system can start normally without working with CPU_OPT.
that is to say, CPU OPT cant prevent the system from booting if there is a problem.
Yet, it can warn you about problems.
Is your HP laptop fan always running and making grinding noise?
The post will show you how to fix the issue of HP laptop fan noise in Windows 10.
There are other names for this bang out of cooler like SYS fan.
As for the brand Asus, it calls it a chassis fan or CHA-FAN.
Also read:Introduction to Computer Fan Including Applications
Can I Use CPU OPT for Case Fan?
And, when the CPU cools down, the case will slow down.
How to cool down laptop if you find the machine is becoming hot?
This post shows you 5 effective tips to keep the laptop cooler.
