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Question: Max acceptable coolant temp?

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tangoseal

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What is the general consensus about what the "Max allowable/acceptable, coolant temp should be in a water cooling rig no matter what hardware is running".

I'm asking about coolant temp, not individual hardware. Lets pretend that this is the perfect water cooling loop perfectly tailored to your hardware, just to cut down on all the what if's.

I'm sure others are interested in this question as well.

Thanks!
 
I'm bad with that air to water delta stuff, but it should be close to whatever your room temperature is IIRC.
 
Well, DDC pumps have a maximum rated operating temperature of 50c, and tubing might become soft at higher liquid temps. Water that hot is actually dangerous as well, since it can scald flesh in a few seconds.
 
My coolant temps seem to be in the range of 38-42c under heavy load with my GPU and CPU running hard.
 
How many rads are you running? This is on your sig rig? You have quite the amount of GPU's lol. I think the air to water delta is measure after it's been cooled, but I could be wrong since I don't know much about it.
 
AdvanSuper said:
How many rads are you running? This is on your sig rig? You have quite the amount of GPU's lol. I think the air to water delta is measure after it's been cooled, but I could be wrong since I don't know much about it.
Click to expand...

Yup that is measured in the Resovoir where it is returning directly from the Rad already cooled down. I havent been running my AC either so the amibient in my office is quite higher than most people would be comfortable with.

Im guessing that I can stress the water as high as the pump safely allows which for me is 60c. But I do not want to pass 45c if I can afford it.

Of course this 6990 is new to me for 2 days now so I guess im just not used to the amount heat this card makes.

edit: My sig had a typo that is supposed to be 1 6970 and 6990 not 2 6970's. My 1155 doesnt have the lanes for 3 cards. Sorry to mislead. I do have another 6970 though. Just not installed its getting RMA;d from Sapphire right now.
 
does the coolant temperature even matter? the temperature you are trying to control is the CPU or GPU or other component. who cares if your coolant water is 30C or 60C if your CPU/GPU/other is within their acceptable limits. those are the numbers you should be concerned with.

you are not "stressing the water". and also the "in" and "out" temperatures of your radiator is likely to be within 1 or 2*C of each other, so it wouldnt really matter where in the loop you take the readings.
 
Stressing water lol .... im worried about stressing pump since it is rated for 60c max. Im no where close but I wanted to find out what the consensus was for finding that wall where water cooling is not efficient any longer.
 
Coolant temp doesn't really matter, except when you're getting too high temps for your hardware.

The larger the water delta, the more heat the radiators are able to exhaust per unit time. So the higher the delta, the more efficient the radiators are.
 
Tsumi said:
Coolant temp doesn't really matter, except when you're getting too high temps for your hardware.

The larger the water delta, the more heat the radiators are able to exhaust per unit time. So the higher the delta, the more efficient the radiators are.
Click to expand...

Yeah this is what I thought. I guess it would be considered application specific on the max acceptable temp.

I guess as long as I keep the temperature under the water pump's m,ax allowable then the system is working as designed.
 
Ideal would be readings before and after the radiator. Near as I recall keeping your temps (water, gpu, cpu) within 5 C of ambient is considered good.
 
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