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Old 05-24-2018, 08:08 PM
c-attack c-attack is offline
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Originally Posted by Fynriel View Post
Sorry for digging this up. I'm in the same boat with a Gigabyte Z370 Gaming 5.
I want to use the front SP RGB fans with the radiator and need to control their speed somehow. I need someone to walk me through how to achieve this.

I don't really understand the difference and function of all these different fan headers on the board.
1. What benefit would I get from plugging a case fan into CPU_FAN vs. a regular fan header?
2. And how would I set them up in the BIOS to control the fan speed?

1) Typically none for a case fan. Most motherboards have a completely different set of protocols for the CPU fan. Its behaviors are still targeted at your typical small air cooler (instant response, CPU temp only variable, etc). To that effect, you generally need something on CPU fan to boot. This is the BIOS' way of making sure you have some cooling method installed.

It is for that reason is makes a nice place to hook up the cooler's pump. All of the above are irrelevant and you set it to 100% and move on. This also solves the boot error dilemma and keeps the more functional chassis fan headers free.

2) Motherboard dependent, but typically you go into the BIOS and find the fan control section. This may be in more than one place. Usually there is some sort of user friendly picture BIOS layer and then you can also access for detailed command in other places. We need someone with GA board to be specific.

EDIT: I see you other post now. The only reason to do this would be you are running out of headers and need to use them. There might be an additional hang up. Some motherboard have PWM only CPU fan headers. That would not work well with the DC motor SP120 RGB.

Last edited by c-attack; 05-24-2018 at 08:13 PM.
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