CPU_FAN header vs PUMP_FAN header?

[DriedSponge]

HI there,

I recently got an AIO for my computer to replace my air cooler, and I'm currently using the CPU_FAN header on my motherboard. I noticed my motherboard also has a header titled PUMP_FAN, so I'm wondering what exactly is the difference and should I be using the pump fan header instead? For reference, I have a MSI B450 TOMMAHAWK MAX and an Acrtic Liquid Freezer II 360. Thank you.

[Stormseeker9]

6 minutes ago, DriedSponge said:

HI there,

I recently got an AIO for my computer to replace my air cooler, and I'm currently using the CPU_FAN header on my motherboard. I noticed my motherboard also has a header titled PUMP_FAN, so I'm wondering what exactly is the difference and should I be using the pump fan header instead? For reference, I have a MSI B450 TOMMAHAWK MAX and an Acrtic Liquid Freezer II 360. Thank you.

Use the cpu_fan. That way the fans *should* ramp up down based on cpu temp. 
 

pump_fan header always pushes 100% I believe and is more so used for custom liquid cooling setups. 
 

I could be wrong but this is from remembrancez

[DriedSponge]

Just now, Stormseeker9 said:

Use the cpu_fan. That way the fans *should* ramp up down based on cpu temp. 
 

pump_fan header always pushes 100% I believe and is more so used for custom liquid cooling setups. 
 

I could be wrong but this is from remembrancez

That's good to know, thank you!

[fonzz1e]

pump pwm header usually has higher power output, 36w (12v by 3a)

compare to normal fan pwm header, 12w (12v by 1a)

 

check yer mobo manual too

[DriedSponge]

1 minute ago, fonzz1e said:

pump pwm header usually has higher power output, 36w (12v by 3a)

compare to normal fan pwm header, 12w (12v by 1a)

 

check yer mobo manual too

In my motherboard manual, I didn't see anything about them other than the fact that they exist. Maybe I was looking in the wrong place.

[Eigenvektor]

Just now, DriedSponge said:

In my motherboard manual, I didn't see anything about them other than the fact that they exist. Maybe I was looking in the wrong place.

Here's an example for the MSI B550 Tomahawk: https://download.msi.com/archive/mnu_exe/mb/MAGB550TOMAHAWK.pdf

Page 23:

Connector  | Default fan mode | Max. current | Max. power 
CPU_FAN1   | Auto mode        | 2A           | 24W
PUMP_FAN1  | PWM mode         | 3A           | 36W
SYS_FAN1~6 | DC mode          | 1A           | 12W

 

[fonzz1e]

oof.... if they don't list it in the manual, then it should be just 1a