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post #1 of 25 (permalink) Old 07-15-2020, 02:42 PM - Thread Starter
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Flow rate?

For a custom loop; D5, 420 rad, CPU block only, 1/2 I.D. tubing, what should I expect (ballpark range) for flow rate?

I realize there are many variables for rad and block restrictions, but I am only looking for a general idea.

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post #2 of 25 (permalink) Old 07-15-2020, 04:54 PM
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Assuming it is a modern cpu block with low psi drop and given radiators are not restrictive..flow should be 2gpm..ish with D5 full speed. D5's on speed 4 much quieter, still should at least 1.75gpm ish. As long as at least ~1gpm, doesnt affect temps much.

You can play with martins liquid lab flow estimator linked below, also has temp changes per flow rate for 200W load. Just plug in D-tek fuzion V2-stock as it simulates avg flow of more modern cpus blocks, EkVel, heatkiller IV, koolance 390, etc. Then can choose D5 vario pump on chart and see how much estimated flow from various components and speed, have to have excel though.

http://martinsliquidlab.petrastech.c...Estimator.html

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post #3 of 25 (permalink) Old 07-16-2020, 02:57 AM - Thread Starter
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Quote: Originally Posted by opt33 View Post
Assuming it is a modern cpu block with low psi drop and given radiators are not restrictive..flow should be 2gpm..ish with D5 full speed. D5's on speed 4 much quieter, still should at least 1.75gpm ish. As long as at least ~1gpm, doesnt affect temps much.

You can play with martins liquid lab flow estimator linked below, also has temp changes per flow rate for 200W load. Just plug in D-tek fuzion V2-stock as it simulates avg flow of more modern cpus blocks, EkVel, heatkiller IV, koolance 390, etc. Then can choose D5 vario pump on chart and see how much estimated flow from various components and speed, have to have excel though.

http://martinsliquidlab.petrastech.c...Estimator.html
See my sig for components. 1/2 inch soft tubing.

I bought a Koolance INS-FM17N Coolant Flow Meter and ADT-FM03 Flow Meter Frequency Adapter.

I plugged the adapter into my Corsair Commander.

Both AIDA64 and HWiNFO report ~700mL per minute. I thought that seemed a bit low.

In no way should it be misconstrued that I do not disagree.
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Last edited by Arctucas; 07-16-2020 at 03:02 AM.
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post #4 of 25 (permalink) Old 07-16-2020, 03:35 AM
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Quote: Originally Posted by Arctucas View Post
See my sig for components. 1/2 inch soft tubing.

I bought a Koolance INS-FM17N Coolant Flow Meter and ADT-FM03 Flow Meter Frequency Adapter.

I plugged the adapter into my Corsair Commander.

Both AIDA64 and HWiNFO report ~700mL per minute. I thought that seemed a bit low.

That’s WAY to slow. 700ml=0.185 gallons. The bare minimum is 0.5GPM so you’re not even half of that. Ideally you want 1GPM, you need to look at adding a second pump.

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post #5 of 25 (permalink) Old 07-16-2020, 04:00 AM
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Quote: Originally Posted by Arctucas View Post
For a custom loop; D5, 420 rad, CPU block only, 1/2 I.D. tubing, what should I expect (ballpark range) for flow rate?

I realize there are many variables for rad and block restrictions, but I am only looking for a general idea.
I honestly think you can achieve 2GPM easily with that D5. I'd wager at pump 80% maybe 1.5 GPM.

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post #6 of 25 (permalink) Old 07-16-2020, 04:56 AM
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Or the Corsair Commander is completely screwing up the data. Because, you know.....buggy Corsair hardware with buggy Corsair software and Corsair being completely incapable of doing anything correctly in liquid cooling.

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post #7 of 25 (permalink) Old 07-16-2020, 06:00 AM
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rate is about what you want it to be, and you want it to be around 1 gallon per minute, which is somewhere around 220 liters per hour if I remember correctly.


note you'd want higher overall flow if you're splitting your flow to multiple GPUs and cooling your board/memory. Hell, at that point you'd even maybe genuinely benefit from a split loop, idk. still seems unlikely.

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post #8 of 25 (permalink) Old 07-16-2020, 06:44 AM
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Quote: Originally Posted by Arctucas View Post
See my sig for components. 1/2 inch soft tubing.

I bought a Koolance INS-FM17N Coolant Flow Meter and ADT-FM03 Flow Meter Frequency Adapter.

I plugged the adapter into my Corsair Commander.

Both AIDA64 and HWiNFO report ~700mL per minute. I thought that seemed a bit low.
Like ciarlatano said, something is off. you have 1 rad (not restrictive), same cpu block as me heatkiller IV (pressure drop only 0.87 psi at 1gpm ie not restrictive) and D5 pump/res.

I have same cpu block (heatkiller IV), 2 rads, D5 setting 4 and gpu block. My flow is 1.2 gallons per minute measured the most accurate way ie inlet tubing draining gallon of distilled over time, which I test with new builds.

So either as ciarlatano pointed out your corsair commander and adapter is very inaccurate or you have a blockage somewhere or your pump has severe issues, even at setting 1 or pwm pump at lowest setting should not be that low with just cpu block/pump rad loop.

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post #9 of 25 (permalink) Old 07-16-2020, 01:36 PM - Thread Starter
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OK, thanks guys, I thought something seemed wrong.

Guess I am tearing it down...



EDIT: I was monitoring it in HWiNFO, went from minimum of 526mL/min to max of 1,159 mL/min. Sounds like failing pump to me. Agree/disagree?

In no way should it be misconstrued that I do not disagree.
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Last edited by Arctucas; 07-16-2020 at 01:40 PM.
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post #10 of 25 (permalink) Old 07-16-2020, 01:57 PM
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Quote: Originally Posted by Arctucas View Post
OK, thanks guys, I thought something seemed wrong.

Guess I am tearing it down...



EDIT: I was monitoring it in HWiNFO, went from minimum of 526mL/min to max of 1,159 mL/min. Sounds like failing pump to me. Agree/disagree?
I would bet the Corsair Commander can't make heads or tails of the input from the flow meter, or that the flow meter or frequency adapter is bad. If that was your flow, your temps would have likely increased very noticeably. When you turn the pump up to full speed to you see movement in the res? Because you probably wouldn't with the flow rates that are being reported.

Yeah....the little girl hentai avatar is really creeping me out....
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