Loop temp

[Pizzaman001]

Hi guys im new to the forum and a bit of a noob with the watercooling scene. here is my question
would a dual ek d5 pump replacement lower my pc temps with a quicker flow rate ?

 

[SirConfused]

Above a certain threshold, pump speed and associated flow rate will make barely any difference. Unless your fluid is barely moving then the pump isn't the problem.

Try posting a little more detail about your loop and let us know what you're trying to achieve if you want more than that.

 

[Mcnumpty2323]

As sirconfused said
Not enough information provided to be able to answer that really
But I use 2 x d5
Quite a complex loop 3x rads,gpu and cpu
Turning 1 pump off doesn't even affect temps
As long as the pumps at 50%+ or so
So my second pumps there for redundancy purposes
If 1 pump ever fails it runs fine just on the other

 

[therealdippy]

I have the EK dual pump. My reasons for choosing it are redundancy and noise reduction. Although my testing during build was not particularly methodical, I believe that if I were to crank up the flow to maximum it would reduce water temperature by perhaps 2C at load. Rad fan speed has a much bigger affect on reducing temperature.

 

[pastymuncher]

Pump speed makes little to no difference. My loop water temp is no different when my D5's are set to minimum (1) or full speed (5). More important is the choice of radiator(s) and if there is enough rad space to cool the components along with the choice of fans and airflow through the rads/case. Choice of block is less important these days as most will perform within 2-4 degrees of each other. It is going to take a radical change of design to make blocks cool any better.

 

[SirConfused]

Pump speed makes little to no difference. My loop water temp is no different when my D5's are set to minimum (1) or full speed (5). More important is the choice of radiator(s) and if there is enough rad space to cool the components along with the choice of fans and airflow through the rads/case. Choice of block is less important these days as most will perform within 2-4 degrees of each other. It is going to take a radical change of design to make blocks cool any better.

Like that snake-oil y splitter cpu block that came out? Watching reviews of that was hilarious

 

[V F]

Like that snake-oil y splitter cpu block that came out? Watching reviews of that was hilarious

This?

 

[Brizzles]

Simple answer - NO

 

[SirConfused]

This?

Yep, that's the one! LTT also did one on it recently too.

 

[Audioboxer]

I have 4 rads and 4 blocks.

3 x 360 and 1 x 120. CPU/GPU front and back and memory.

1 XD5 pump. Between 70% and 100% on the pump I get a 1 degree decrease on my GPU under a heavy load. I keep it at 70% as it's nearly inaudible. Rad space/quality fans (I use Noctua A12x25) makes much more difference to keep my GPU under 40 degrees on average loads, or around 40~44 when pulling up to 500w.

Diminishing returns with flow at a point because the D5 pump is far more powerful than it gets credit for online at times (people acting like if you have more than 2 rads and a few bends in your loop you're at risk of flow issues lol).

 

[V F]

I have 4 rads and 4 blocks.

3 x 360 and 1 x 120. CPU/GPU front and back and memory.

1 XD5 pump. Between 70% and 100% on the pump I get a 1 degree decrease on my GPU under a heavy load. I keep it at 70% as it's nearly inaudible. Rad space/quality fans (I use Noctua A12x25) makes much more difference to keep my GPU under 40 degrees on average loads, or around 40~44 when pulling up to 500w.

Diminishing returns with flow at a point because the D5 pump is far more powerful than it gets credit for online at times (people acting like if you have more than 2 rads and a few bends in your loop you're at risk of flow issues lol).

Do you know your flow rate numbers? I want to get a second pump at some point to take the possibility up to 1.5Gpm but at the same time to dial it back for lower speeds/noise with no decrease in flow.

 

[Drumroll]

Unless you’re using very restrictive radiators and blocks, don’t worry about.
When I tried 3 Corsair XR5 360 and 2 Alphacool blocks I noticed the flow was badly affected. Angled fittings will impact more if used straight at the output of the pump. Everywhere else, not as much.
The D5 is my favourite pump. Never had any issue and never had to run one at 100%.
You may play around and find exactly at which % your pump is quiet, as it changes from unit to unit, and leave static at that.
Used dual pump before and unless you’re struggling with flow, you won’t see any improvement.
Basically you need to find the correct balance where the coolant spends enough time in the block and then in the radiators to shift temperature.
Personally I like EK radiators, but not the slim ones. PE performed very well and aren’t restrictive at all. XE the same, but you need push/pull or high RPM to make the most of them.
EK blocks are fine. Just check they’re assembled correctly, as lately quality control have been a lottery.
Used a D5 for dual PE 360 + XE 360, monoblock and GPU + Active backplate and plenty of angled fittings. No issue.
Measuring flow at the time, as mentioned before, only when I used an angled fitting at the out port of the pump I noticed significant drop in flow.

 

[Audioboxer]

Do you know your flow rate numbers? I want to get a second pump at some point to take the possibility up to 1.5Gpm but at the same time to dial it back for lower speeds/noise with no decrease in flow.

Only per a Barrow flow meter, so can't suggest it's properly accurate outside of me being able to go "hey, the flow meter increases its reading when I turn pump speed up".

At 70% it reads about 3L/min (like 3.2x), at 100% it's like 5l/min.

 

[V F]

Unless you’re using very restrictive radiators and blocks, don’t worry about.
When I tried 3 Corsair XR5 360 and 2 Alphacool blocks I noticed the flow was badly affected. Angled fittings will impact more if used straight at the output of the pump. Everywhere else, not as much.
The D5 is my favourite pump. Never had any issue and never had to run one at 100%.
You may play around and find exactly at which % your pump is quiet, as it changes from unit to unit, and leave static at that.
Used dual pump before and unless you’re struggling with flow, you won’t see any improvement.
Basically you need to find the correct balance where the coolant spends enough time in the block and then in the radiators to shift temperature.
Personally I like EK radiators, but not the slim ones. PE performed very well and aren’t restrictive at all. XE the same, but you need push/pull or high RPM to make the most of them.
EK blocks are fine. Just check they’re assembled correctly, as lately quality control have been a lottery.
Used a D5 for dual PE 360 + XE 360, monoblock and GPU + Active backplate and plenty of angled fittings. No issue.
Measuring flow at the time, as mentioned before, only when I used an angled fitting at the out port of the pump I noticed significant drop in flow.

I have no 90 fittings in the loop apart from drain but it turns out the Heatkiller IV block did drop the flow rate some. It went from 212L/h with Velocity to 195L/h for Heatkiller IV with the High Flow Next 2. 205L/h under load. Though the Heatkiller is pulling better temperatures over the Velocity. 55 - 59C gaming. The XE did make a difference with push/pull running the fans at 1100 - 1200 alongside EK PE radiator and Hardwarelabs GTS. Water temperatures are around 31 - 33C under load. GPU is 41 - 43C. Hit spot 48C. Memory 46C.