Flow sensor for Asus motherboard W_FLOW header

Avacado · Aug 2, 2021

Chili195 said:
Just an update on this. I did end up getting a High Flow 2 from Aqua Computer. Plugged it into my loop and the temperature sensor in WATER_IN and the 3-pin flow connector into W_FLOW. The temperature works as expected. The good news with the flow sensor is that it does seem to work - at least it provides a measurement of some sort. The problem is there is no way to calibrate this - it is just using whatever ASUS's assumption is to convert whatever is reported into litres per hour.

With the pump on max it shows as 6l/minute in the BIOS, with a much more accurate figure to three decimals in HWInfo. Once the pump lowers to around 60%, the reading disappears so presumably it then drops below the minimum detection of 40l/hr at that point. The number seems a little low, but then the flow in my loop always felt low to me anyway hence wanting to measure it.

The lowest reported speed at the cutoff point is 2.208 litres per minute. So if the minimum of the High Flow 2 is 0..66 litres per minute that would suggest that the board is interpreting the figures at 2 litres per minute higher than the actual value at this base level (with possibly a higher deviation at higher speed).

Would be great if the measurement could be calibrated in the BIOS but at least it is useful for comparing relative differences in flow at different pump settings. I might get the Aquaero anyway down the line which hopefully should provide the accurate flow figures.

My loop by the way:

TechN AMD CPU block
Corsair XG7 3080 block
EK 150/D5 pump/res combo

D5 can run for years. Unless you are against the D5 hum, let her fly and put this issue to bed.

Wishmaker · Aug 2, 2021

Due to some restrictions in my loop, I have placed a NEXT before the reservoir to see how cool the water is after passing through both rads.
I am plugged one USB header and using the 4 pin side as one is blocked. I had to pay attention to the ground. See the central cable on the bottom of the mobo.
I do not have any other sensors connected to it.

I then compare with my Glacial sensors on motherboard to check for differences.
You can see that before the res I have 32.9 centigrade on water whilst running Real Bench.
My Glacial water in sensor is 33C which is identical to the NEXT reporting. So the 3080TI does not make any difference on it.
Then my Glacial water out sensor is 34C degrees which shows that neither the 3080TI nor the 11900K makes a dent in the loop as long as flow is adequate and air pushes on the rads.

ttang · Aug 3, 2021

Sweet setup, that MB looks sick.

That's what I thought too then i retested with...
PRIME95 on CPU
FurMark/Crypto Mining on GPU
My temps went up

Coolant temp 26C @ ide (ambient temp 21C)
CPU stress add 5C
GPU stress add 8-10C
BOTH @100% add 15-17C, coolant hitting low 40sC

I have...
AMD ryzen 7 5800X
RTX 3090 FE + cosair wb
2 x 360PE Rads
1 x 240PE Rads
9 x Notuca IPP 2000prm Fans
5 x Notuca Slim Fans
In O11D Mini

Wishmaker · Aug 3, 2021

Your set-up is insane as well !!!
Yeah the moment you exceed ambient temps by 10 degrees you are generating more heat than the fans can push away.
I had the water as well at 39 centigrade because I was testing some settings.
For me the RTX 3080TI memory temps are the trigger for my loop fans and pump.
Its quite annoying to see the CPU at 45 centigrade and all in super silent mode while the Hot spot and memory temps have a 10 degree delta and the Memory hits 80 centigrade.
I will be honest, i was not expecting such temps with water rofl

ttang · Aug 4, 2021

thanks

You must be getting way better air flow that me, I cant seem to maintain 10C delta from ambient with both CPU & GPU @ 100%.

I know what you mean with the GPU memory temps, I hit 76C, on the return port on the res (there's 2 ports available on FLT Res) I have added a XSPC 10K temp sensor and connected to the T-Sensor input on the Mobo, my pump & fans are set via T-Sensor (33%@30C, 66%@35C & 99%@40C), this method seems better for me.

HWinNFO64 (CPU and GPU both stressed for 1hr) - Coolant reached 45C!

HWinNFO64 (CPU stressed for 1hr) - Coolant reached 30C (+3 from ambient)
I agree with you, the CPU doesn't seems to take much out of the the loop only 3-4C

So it looks like RTX 3090FE is the cause of my high temps, I may look into going 'Active Backplate' cooling.
Mine gets so hot you cant touch it for more than 1 sec.

Vinster411 · Aug 17, 2021

To add another product that works with the W_Flow plug is the Koolance ADT-FM03 Flow Meter Frequency Adapter and INS-PM-14 Flow Meter.

I'm running a D5 Pump and it's reporting the flow @50% is about 29l/m and @100% is about 88L/min. I know those values are false, but at least I have a reference in case issues arise.

I'm running standard 10K temp probes. one before the 1st rad and one at the Res (so before and after the rads), running 3x 360mm rads. Only getting a Delta of 2 degrees on water temp. GPU tops out at 51 Degrees, CPU at 70 Degrees when Stress Testing.

I have the Fans and pump running off the W_IN and W_OUT probes. Everything is PWM.

Hood Automotive tire Motor vehicle Automotive exterior Automotive design

Display case Gas Automotive design Machine Metal

Vin

Avacado · Aug 19, 2021

Vinster411 said:
To add another product that works with the W_Flow plug is the Koolance ADT-FM03 Flow Meter Frequency Adapter and INS-PM-14 Flow Meter.

I'm running a D5 Pump and it's reporting the flow @50% is about 29l/m and @100% is about 88L/min. I know those values are false, but at least I have a reference in case issues arise.

I'm running standard 10K temp probes. one before the 1st rad and one at the Res (so before and after the rads), running 3x 360mm rads. Only getting a Delta of 2 degrees on water temp. GPU tops out at 51 Degrees, CPU at 70 Degrees when Stress Testing.

I have the Fans and pump running off the W_IN and W_OUT probes. Everything is PWM.

View attachment 2521453

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Vin

Some interesting tube bends you have there.

GlasgowTigers · Nov 11, 2021

OK I'm trying to find compatible flow meter for months. Is that High Flow 2 from Aqua Computer really working? As I was having few and non of the was sending signal to computer all of them was having useless screen for me at least it's useless.

Wishmaker · Nov 19, 2021

It seems to be working for me.

Font Screenshot Software Technology Electronic device

GlasgowTigers · Nov 20, 2021

I can confirm it's working for me.

finas · Nov 28, 2021

This one seems perfect. Very small and with temperature reading integrated. Wonder if it works:

SEN-FM18T10 Coolant Flow Meter with Temperature Sensor, 10K Ohm

Koolance's inline flow meters provide electronic indication of real-time coolant flow rate. This model also integrates a thermistor coolant temperature senso

koolance.com

Avacado · Nov 28, 2021

Delete

RiffageGalore · Jun 18, 2022

Vinster411 said:
To add another product that works with the W_Flow plug is the Koolance ADT-FM03 Flow Meter Frequency Adapter and INS-PM-14 Flow Meter.

I'm running a D5 Pump and it's reporting the flow @50% is about 29l/m and @100% is about 88L/min. I know those values are false, but at least I have a reference in case issues arise.

I'm running standard 10K temp probes. one before the 1st rad and one at the Res (so before and after the rads), running 3x 360mm rads. Only getting a Delta of 2 degrees on water temp. GPU tops out at 51 Degrees, CPU at 70 Degrees when Stress Testing.

I have the Fans and pump running off the W_IN and W_OUT probes. Everything is PWM.

View attachment 2521453

View attachment 2521455

View attachment 2521456

Vin

If you use AIDA64 sensors section, you'll get an accurate conversion to l/h for your Koolance. The rpm signal is essentially ml/min, too. So 4000rpm is 4000ml/min, or 4L/min, or 1 gallon per minute.

You can have hwinfo64 do the conversion correctly as well -- I entered a custom multiplier that works and now it reads in l/minute.

You can see what your delta between inlet and outlet (hottest and coldest parts of loop) should be with this equation: 0.86 * P/F = delta. P is watts, F is flow rate in L/H. So, the more watts you pump in at the same flow rate, the higher this delta will be. For those getting only a 1c delta, their watt heat load must be right in line with their flow rate (i.e. 250 watts and a 250 l/h flow...this would be .86c delta).

Reverus · Jul 29, 2023

what sort of device I would need for this to work.

I just got the Bykski digital one and it is 3 pins, I have an Asus board too (x670e Extreme) and it has that one but also two 2-pin in a stack like you could have a 4-pin square plug... or... 2x 2-pin plugs? It says flow_in and f_out It's not easy to decipher. Plus I heard that you can put a a flow sensor on a fan header and perhaps the fan software can be set to read flow?? Anyway, the big block shaped flow/temp sensors seem to have 3-pin plugs from what I have seen. As long as they are relatively newer models

Flow sensor for Asus motherboard W_FLOW header

Avacado

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ttang

Wishmaker

ttang

Vinster411

Avacado

GlasgowTigers

Wishmaker

GlasgowTigers

finas

SEN-FM18T10 Coolant Flow Meter with Temperature Sensor, 10K Ohm

Avacado

RiffageGalore

Reverus

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