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Author Topic: Pump_fan1 or cpu_fan1  (Read 1518 times)

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dmoquin32Topic starter

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Pump_fan1 or cpu_fan1
« on: 16-January-19, 08:59:40 »

I recently built my first gaming rig. I bought a h100i rgb platinum aio. I also got the msi mpg z390 gaming edge ac motherboard. Should I plug my water pump to the pump_fan1 header or the cpu_fan1 header? I noticed last night while playing a game the ml fans on the radiator will keep revving up to max then slow way back down and then repeat process. I am thinking that it was because I had the pump connector in the cpu_fan1 header and not the pump_fan1 header. I did switch the plug and everything seems fine but being new to pc gaming rigs I wanted to be sure.
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miklet

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Re: Pump_fan1 or cpu_fan1
« Reply #1 on: 16-January-19, 10:25:27 »

In my two systems using AIO's I choose to:
plug the pump wire into Pump_fan enter BIOS set voltage to 100% or 12v select control as DC this keeps the pump running 100% all the time.
I have four fans in push-pull mounted to the radiator. all four fans are connected to a "4-into-1" wire adapter.
plug the adapter wire into CPU_fan enter BIOS select PWM control then set a fan curve that starts very very low (600rpm) at 30C and rises slowly to 100% (1800rpm) at 85C.
my CPU temps range from 29C to 66C never higher
my CPU coolant temps range from 29C to 44C never higher
well this is my approach with the hardware listed below.
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System 1 - Rosewill Stealth Case
MSI X370 Gaming Pro Carbon E7A32AMS.1L0 AGESA 1.0.0.6
MSI WI-FI/Bluetooth PCIe card MS-8905C
AMD Ryzen 5 1600 OC 3.875GHz 
Corsair RAM CMW16GX4M2C3200C16W 2x8=16GB OC 3466MHz 16-18-18-36-81-1T 1.4v
EVGA AOI CLC120
EVGA GPU 6GB 1060 v430.86
EVGA PSU 750G3
WD SSD 512GB M.2 PCIe Gen3 x4 Black (2017)
Windows 10 Home 1903 18362.145
System 2 - Corsair 750D Case
MSI X470 Gaming M7 AC E7B77AMS.180 AGESA 0.0.7.2
AMD Ryzen 7 2700X auto settings
Corsair RAM CMU16GX4M2C3200C16B 4x8=32GB XMP1 2933MHz
EVGA AOI CLC280
EVGA GPU 8GB 1080FTW v430.86
EVGA PSU 850 watt G3
WD SSD 512 GB M.2 PCIe Gen3 X4 Black (2018)
Windows 10 Home 1903 18362.145

dmoquin32Topic starter

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Re: Pump_fan1 or cpu_fan1
« Reply #2 on: 16-January-19, 14:51:02 »

Thanks for the reply. My issue is that my pump fans are revving up so high that I hear a chime on windows and the all the rgb on aio shut off and come back on. Is this because I had the pump plugged into the cpu_fan1 header?
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miklet

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Re: Pump_fan1 or cpu_fan1
« Reply #3 on: 16-January-19, 16:47:03 »

Remember that I can only speculate with the information at hand. One theory is that the pump was set as PWM and was running well below 12v then ramping up and down. The fans were only trying to keep up with the rising and falling CPU temperature. MAYBE.
I believe water cooling works best if the pump runs at full 12v. Does not matter which fan header you choose if you go into the BIOS and make sure it is set to DC (not PWM) and full 12v. This will continuously move the coolant over the CPU and through the radiator. Second, I prefer fans on both sides of radiator, pushing and pulling air, this time choose the PWM fan type. This means the user can adjust the speed of the fans based on temperature of the CPU. Personally, I don't think the fans do as much to cool the radiator as the coolant pump. I set my fan curves extremely low and quiet. Hope you understood that text. If you didn't quite get it, ask. I will try to help.
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System 1 - Rosewill Stealth Case
MSI X370 Gaming Pro Carbon E7A32AMS.1L0 AGESA 1.0.0.6
MSI WI-FI/Bluetooth PCIe card MS-8905C
AMD Ryzen 5 1600 OC 3.875GHz 
Corsair RAM CMW16GX4M2C3200C16W 2x8=16GB OC 3466MHz 16-18-18-36-81-1T 1.4v
EVGA AOI CLC120
EVGA GPU 6GB 1060 v430.86
EVGA PSU 750G3
WD SSD 512GB M.2 PCIe Gen3 x4 Black (2017)
Windows 10 Home 1903 18362.145
System 2 - Corsair 750D Case
MSI X470 Gaming M7 AC E7B77AMS.180 AGESA 0.0.7.2
AMD Ryzen 7 2700X auto settings
Corsair RAM CMU16GX4M2C3200C16B 4x8=32GB XMP1 2933MHz
EVGA AOI CLC280
EVGA GPU 8GB 1080FTW v430.86
EVGA PSU 850 watt G3
WD SSD 512 GB M.2 PCIe Gen3 X4 Black (2018)
Windows 10 Home 1903 18362.145
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