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post #21 of 35 (permalink) Old 05-17-2020, 03:27 PM
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post #22 of 35 (permalink) Old 05-17-2020, 04:17 PM
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Pumps and fans are variable, and both can be linked to any temperature, or combination of temperatures you please with either software (argus) or more expensive hardware (aquaero). You should have a system that takes care of itself and increases fans and pump when it needs to.

The only way I can see it not working is if you're already at max cooling capacity on a cold day with nothing in reserve - You always need a few rpm's in reserve


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post #23 of 35 (permalink) Old 05-18-2020, 12:23 AM
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I live on the beach and have 5 radiators + 2 pumps.

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post #24 of 35 (permalink) Old 05-18-2020, 01:45 AM - Thread Starter
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Quote: Originally Posted by broodro0ster View Post
Nothing. If my GPU works fine at 38°C during the winter, it also works fine at 43°C in summer. Same for my CPU.
That 5-8°C increase in temps shouldn't matter. If that throws of your stability, then you have other problems.

During winter, my ambient around my computer is always 2-3°C higher than roomtemp, because hot exhaust air stays around the case. If I open a window in summer or put a fan on, that hot air can't circulate around the case anymore and my intake temps drop by 2-3°C. So that might helps if you don't have an AC that regulates air circulation in your room.
Things are quite different with the 2080 Ti, they run hotter than the 1080 Ti... But you are right the difference between summer and winter temps at the components is about 5C.

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post #25 of 35 (permalink) Old 05-18-2020, 01:57 AM
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Quote: Originally Posted by Astral85 View Post
Things are quite different with the 2080 Ti, they run hotter than the 1080 Ti... But you are right the difference between summer and winter temps at the components is about 5C.
Yes, I know. The 2080TI uses a lot more power than the 1080TI. Undervolting should help quite a bit on this.
I can run my 1080TI at 925mV at about 2000mhz. This lowers power consumption to about 60-70% TDP while gaming. If I overclock it to the max, I'm only achieving 2088mhz at 1093mV and then I'm constantly hitting the power limiter of 117% (I have mine always maxed out).

Lowering the voltage lowers the delta between the GPU core and water temp by about 2°C. And because my GPU isn't dumping that much heat into the loop, the water temps also drop by 2°C.

I like the manual undervolt better than lowering the powerlimit because it gives better clocks for the same voltage. And the core frequency never dips because the powerlimit is never exceed. My mate tried this on his 2080TI and the effect of this was even bigger than on my 1080TI.

And the difference between 2000mhz and 2088mhz, is about 3 fps in Assassins Creed Odyssey on 1440p. I dropped from 87fps to 84fps while I was switching profile in Afterburner when standing still. No the impact is not that big. Something worth trying if you like to mess around with After Burner.

But still, even if you go for the max OC, it shouldn't be an issue on water. These cards run at 80°C without any issues when being aircooled. So worst case you hit 55°C on a 2080TI in summer.

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post #26 of 35 (permalink) Old 05-18-2020, 04:43 AM - Thread Starter
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Quote: Originally Posted by broodro0ster View Post
Yes, I know. The 2080TI uses a lot more power than the 1080TI. Undervolting should help quite a bit on this.
I can run my 1080TI at 925mV at about 2000mhz. This lowers power consumption to about 60-70% TDP while gaming. If I overclock it to the max, I'm only achieving 2088mhz at 1093mV and then I'm constantly hitting the power limiter of 117% (I have mine always maxed out).

Lowering the voltage lowers the delta between the GPU core and water temp by about 2°C. And because my GPU isn't dumping that much heat into the loop, the water temps also drop by 2°C.

I like the manual undervolt better than lowering the powerlimit because it gives better clocks for the same voltage. And the core frequency never dips because the powerlimit is never exceed. My mate tried this on his 2080TI and the effect of this was even bigger than on my 1080TI.

And the difference between 2000mhz and 2088mhz, is about 3 fps in Assassins Creed Odyssey on 1440p. I dropped from 87fps to 84fps while I was switching profile in Afterburner when standing still. No the impact is not that big. Something worth trying if you like to mess around with After Burner.

But still, even if you go for the max OC, it shouldn't be an issue on water. These cards run at 80°C without any issues when being aircooled. So worst case you hit 55°C on a 2080TI in summer.
I'm finding the power consumption to be the driving factor of the GPU temps with my 2080 Ti, voltage (strangely) doesn't seem to (I think) matter. The card can be boosting full clock speed (2000MHz+) @ 1.087V in a game menu and still be at 37-38C because there is just 38% load. I find there is a definite 2-3, occasionally 4C rise at the GPU core when it hits 100%+ power. The power spikes are dynamic though because normally I am not constantly on the power limit. Capping my frame rate prevents that. Your voltage should also be dynamic, usually it only boosts max voltage if it needs too... This is what people say but I still voltage control on Turing a strange being... My card likes to settle at around 1.050V while holding a good overclock. I will try what you are doing and see what results I get. Thanks.

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post #27 of 35 (permalink) Old 05-18-2020, 07:12 AM
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Quote: Originally Posted by Astral85 View Post
I'm finding the power consumption to be the driving factor of the GPU temps with my 2080 Ti, voltage (strangely) doesn't seem to (I think) matter. The card can be boosting full clock speed (2000MHz+) @ 1.087V in a game menu and still be at 37-38C because there is just 38% load. I find there is a definite 2-3, occasionally 4C rise at the GPU core when it hits 100%+ power. The power spikes are dynamic though because normally I am not constantly on the power limit. Capping my frame rate prevents that. Your voltage should also be dynamic, usually it only boosts max voltage if it needs too... This is what people say but I still voltage control on Turing a strange being... My card likes to settle at around 1.050V while holding a good overclock. I will try what you are doing and see what results I get. Thanks.
Voltage matters because power = voltage*amps.
Resistance is calculated by voltage/amps. So if the voltage goes up, the amperes go up and the total power consumption goes up.

A card sitting at 40% load will always be a few degrees cooler than a card sitting at 100% because the amp draw is lower which means a lower total power draw.
But if you compare a GPU loaded at 100% that runs are 900mV and then at 1093mV, the setting at 900mV will always be cooler under the same scenario.

To lower GPU usage, you could setup a frame limiter. This will also result in lower temps. That in combination with undervolting, can gain you at least 5°C temp wise (but at the cost of a lower frame rate)

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post #28 of 35 (permalink) Old 05-18-2020, 07:28 AM
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post #29 of 35 (permalink) Old 05-19-2020, 03:31 PM
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Quote: Originally Posted by Astral85 View Post
Just wondering if you guys change up your cooling configurations in any way to better cope with summer temperatures. If so how or what do you do? Has anyone found additional radiators helped? What sort of temps do you experience in summer? It's actually coming into winter where I live but I am still on a mission to figure out how to beat the summer heat during that season...
I generally drop the AC 2F on days I game and have a oscillating fan on low to be quiet blowing hot air towards the top of the open door. Never ate me to keep mic from shut wind noise away like so many have in the summer. Seems to suck in the cool air around and move heat out better. Generally the room is plus 5F and the machine runs 10F higher doing this for 3-4 months. It also adds all of like 15 buck to electric bill a month and still keeps my room and fans quiet.
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post #30 of 35 (permalink) Old 05-19-2020, 04:08 PM
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My triple barrel 13,500k fans are plenty, but for 4.6GHz I use the 240 AIO in a 4U case.
The 1U also works but the fans re so damn loud.
Depending on heat these open frame racks are sweet and catch any breeze.

But these PCs are used for outdoor festivals, fairs and corporate events.






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