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When do you need to move to two D5 pumps?

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post #11 of 17 (permalink) Old 03-01-2019, 08:42 PM
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I have a CPU, VRM and 2 GPU blocks along with a 560 GTX 480 GTX and 280 SR2 plus 2 QDCs. With 2 D5's at full blast I get like 1.1 GPM.

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post #12 of 17 (permalink) Old 03-04-2019, 11:56 AM
 
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The generally accepted wisdom of water cooling is that your loop needs to maintain a flow of 1GPM or greater to be most efficient. So if you can get 1GPM or greater with the equipment you have you are fine. If you get less than 1GPM you need another pump in serial, or as others suggest you can run parallel loops. (I run all mine serial with dual pumps running less than 50% for noise and for aesthetic reasons).

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post #13 of 17 (permalink) Old 03-04-2019, 12:03 PM
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When you have the money

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post #14 of 17 (permalink) Old 03-05-2019, 08:28 AM
 
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Quote: Originally Posted by skupples View Post
When you have the money
Unfortunatly, custom loops are not a budget friendly hobby. Lots of data to support the 1GPM requirement. Wish Martin was still publishing but his data is still out there. There are stronger pumps available for a single pump configuration. Lots of ways to measure flow without a flow meter. A graduated home depot bucket and a watch will work as accurate as a flow meter.

That is what really determines the need for a second pump. All else is redundancy and preference.


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post #15 of 17 (permalink) Old 03-05-2019, 08:34 AM
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Quote: Originally Posted by MADworld View Post
My current plan

1x 560 Hardware Labs Black Ice SR2 560MP
2x 420 Hardware Labs Black Ice SR2 420MP
1x CPU Watercool Heatkiller IV Pro Intel Black Copper
2x GPU Watercool Heatkiller IV RTX 2080 Ti acrylic Ni-Bl RGB
1x RES Aqua Computer Aqualis XT
1-2 PUMP Aqua Computer D5 Next

All with hard tubing (brass) so quite a few 90 degree angels I imagine.

Would a single Aqua Computer D5 Next be able to handle this or should I look at a dual serial D5 setup?

TLDR When is it too much for a single D5?

That setup is borderline for a single D5 pump. It will be possible but the pump will need to run close to 100% in order to achieve just acceptable flow rate. In other words this calls for double D5.

Absolutely go single loop ! Your plan of maximizing 3D radiator space is awesome so make sure you use it by sharing all load over that combined volume. Splitting into 2 loops would be a mistake
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post #16 of 17 (permalink) Old 03-07-2019, 05:23 AM
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I read through this thread (and others) about using 2 pumps. My loop consists of a XRes 140 D5, 2 PE360s, a XE 360, 6 90 degree elbows and a Supremacy block. It is all soft tube. My temps seem fine at idle, but I feel they should be better than they are with 3 360mm rads, especially when bench marking or pushing it hard. I've seen other people using the same chip as I am (7900X) with more current and less rad space and they are running cooler than I am. Something has to be going on here.

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post #17 of 17 (permalink) Old 03-07-2019, 06:07 AM
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Quote: Originally Posted by RichKnecht View Post
I read through this thread (and others) about using 2 pumps. My loop consists of a XRes 140 D5, 2 PE360s, a XE 360, 6 90 degree elbows and a Supremacy block. It is all soft tube. My temps seem fine at idle, but I feel they should be better than they are with 3 360mm rads, especially when bench marking or pushing it hard. I've seen other people using the same chip as I am (7900X) with more current and less rad space and they are running cooler than I am. Something has to be going on here.

well their are a couple things most likely going on with your water loop, but a second pump may fix most of the issues.


https://www.overclock.net/forum/61-w...ter-block.html


as for the CPU water block itself, that is up to you on how to deal with that issue, if your CPU water block has the same issue mine has.(replace it)

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