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Data On Coolant Flow Path Versus Temperature?

post #1 of 14
Thread Starter 
Hi All,

I'm wondering if anyone can share specific data or experiences on how the order of components in the water flow affects CPU and/or GPU temps?

I find theories fascinating, but here I'm looking for actual data--ideally temps with components in one order, then temps with the flow path changed. Personal experiences and links to reviews/data would both be grrrrrreat!

Thanks, and happy cooling!
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post #2 of 14
I've always bee told Pump - Rad - CPU - GPU - Res - Pump

Some people say rad before the pump, but it all actually levels out to the same in the entire system +/- 1C.

Go to google for test setups...I'm not breaking down my setup 4 different times to give you an answer
    
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post #3 of 14
IMO, Pump, CPU, VGA, RAD, RES, Pump... I dont have any data though...
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post #4 of 14
Quote:
Originally Posted by Snerp
I've always bee told Pump - Rad - CPU - GPU - Res - Pump
Some people say rad before the pump, but it all actually levels out to the same in the entire system +/- 1C.
Go to google for test setups...I'm not breaking down my setup 4 different times to give you an answer
I share the same info as above.
This would be air vs water.

I'm using the DD5 pump
Flow rate set to 5 on the pump.
My temps before:
CPU 32-34c idle
CPU load 45-50c and on hot days 55c
GPU 36-38c idle
GPU 52-56c load

Now
CPU 24-26c idle
CPU never over 41c @ load
GPU 30-34c idle
GPU Guessing never above 40c @ load
Hope this helps
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post #5 of 14
Quote:
Originally Posted by DrDeville
Hi All,

I'm wondering if anyone can share specific data or experiences on how the order of components in the water flow affects CPU and/or GPU temps?

I find theories fascinating, but here I'm looking for actual data--ideally temps with components in one order, then temps with the flow path changed. Personal experiences and links to reviews/data would both be grrrrrreat!

Thanks, and happy cooling!
Like Snerp has said above me, the best flow path usually goes Pump->Radiator->CPU Block->GPU Block->Miscellaneous->Reservoir->Pump. The idea is to have the coolest water possible, (Directly from the radiator, no heat added by the pump or other waterblocks), to go the most heat critical component, the CPU. After that, most people put the GPU block. Some put a chipset block before that, mainly because chipsets add very little heat to the loop (in comparison to the other components), mainly because it is easier to rout the tubes that way. After that, if you have them, miscellaneous blocks come in, such as HDD blocks and such. After that, the water goes to the reservoir, so that the pump can get air free water. Then it repeats itself.
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post #6 of 14
Quote:
Originally Posted by pauldovi
IMO, Pump, CPU, VGA, RAD, RES, Pump... I dont have any data though...
I 2nd that.
Most efficient setup IMHO.
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post #7 of 14
It seems like there is some disagreeance between the best setup. Maybe we could have someone check it out. But, regardless I don't think the difference would be significant.
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post #8 of 14
Quote:
Like Snerp has said above me, the best flow path usually goes Pump->Radiator->CPU Block->GPU Block->Miscellaneous->Reservoir->Pump. The idea is to have the coolest water possible, (Directly from the radiator, no heat added by the pump or other waterblocks), to go the most heat critical component, the CPU. After that, most people put the GPU block. Some put a chipset block before that, mainly because chipsets add very little heat to the loop (in comparison to the other components), mainly because it is easier to rout the tubes that way. After that, if you have them, miscellaneous blocks come in, such as HDD blocks and such. After that, the water goes to the reservoir, so that the pump can get air free water. Then it repeats itself.
agree with these guys and hence thats how mine is setup

allthough in all actuality the difference in temps may only be 1 or 2c but then again thats the difference between 1 or 2 c and when your setting it up if all you have to do is change the order stuff is lined up then why not do it (right)

rad before all cooled components as stated above gives the garunteed coolest water to the cooled components, your pump is more then likely water cooled so therefor it will ad some heat (although minimal) to the water

cpu next becuase thats the one thing your usually pushing the limit of and when your pushing the limit a 2c difference can be just what you need however in all actuallity you could line it up to any block just put the one you want the coolest first and so on and so forth

now next wiould prob be the reservoir and there are 2 main reasons for this- one if you have it mounted at a higher point then the pump the weight of the water actual helps the pump and as stated above it helps to rid air from the system if theres any (although there shouldnt be unless you have a leak at the pump suction or something)

so yeah pump-rad-cpu-other blocks-reservoir
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post #9 of 14
When using a peltier for cooling then you do see a difference in the water going in and out of the water block, I havent measured this but you can feel the difference significantly. In this case having the rad in the loop just before the water block is the only way. When running a TEC the water block gets very hot so the liquid going through the lines to the res is also very warm so its important for the res to do its job well. Put your hand behind your rad and you will feel the warm air. On the other hand with-out using a pelt the differences are fairly little but I still use the same principle. This has been argued for many a year so the only way to be sure is give it a go on your own and see your own results. For me when running Water- cpu block\\ pump\\ rad\\ and so on, if there is a res I put it after the cpu and before the pump.
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post #10 of 14
Thread Starter 
Quote:
Originally Posted by lohoutlaw
I share the same info as above.
I'm using the DD5 pump
My temps before:
CPU 32-34c idle
CPU load 45-50c and on hot days 55c
GPU 36-38c idle
GPU 52-56c load

Now
CPU 24-26c idle
CPU never over 41c @ load
GPU 30-34c idle
GPU Guessing never above 40c @ load
Hope this helps
Hey Outlaw,

Very helpful, thanks. Those are relatively big changes. Can you clarify what the "before" and "now" cases are? Different water flow path? Or air cooling versus water cooling?

Gracias
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