Wieland Pumpless AIO CPU Cooler Tested

[btarunr]

Wieland AIO CPU cooler is a prototype closed-loop liquid CPU cooler that lacks a pump, or any form of active coolant flow between the heat-source (the CPU block), and the sink (the radiator). The cooler works on the principle of thermosiphon, where the temperature differential between the source and sink cause coolant flow. This is essentially how solar water heaters work, as they drive coolant (water) between the heating panels and a storage tank. It's not like the cooler is without any moving parts, the radiator still needs ventilation from fans.

Der8auer tested a prototype Wieland cooler, and compared its cooling performance to that of a typical 240 mm AIO CLC (with a pump), on a machine with an AMD Ryzen 9 7950X processor with a 170 W TDP. During a 20-minute Cinebench R23 multithreaded stress test, the 240 mm AIO held temperatures to around 70 °C, while the Wieland AIO managed 78 °C. The power draw with the regular 240 mm AIO was higher, as the processor probably utilized the lower temperature to hold onto higher boost frequencies.



View at TechPowerUp Main Site | Source

 

[Ferrum Master]

Typo

"Wielend AIO CPU cooler"

 

[A Computer Guy]

I'm looking forward to the day of a mass produced non-toxic zero pump noise solution. This looks interesting.

 

[Vladiczech]

Finally AIO to compete with my ultra quiet no-nonsense NH-U12A? AIO without pump is the way to go.

 

[BoggledBeagle]

Do not post in this thread, post in this one instead:

Pumpless AIO that actually works, tested by Der8auer

Fixes one of the main issues I have with AIOs - weak pumps that wear out and are noisy. Cools 200 W no problem, 36000 points instead of 36300 with a corsair 240 AIO, prototype, still room for improvement. Custom loop will still be much better, but this fixes the reliability and noise issues...

www.techpowerup.com

 

[Haile Selassie]

That's essentially tower air cooler performance, if not worse, nothing groundbreaking here. Single-phase thermosiphons simply do not work for the power flux emitted by modern day CPUs, regardless of the elaborate heat exchanger design.

As a secondary HX heat pump it does work well (as proven by solar where you normally get 1kW/m2), it just doesn't work with CPUs which have about 1500x higher heat flux (up to 150W/cm2).

 

[TheDeeGee]

That's essentially tower air cooler performance, if not worse, nothing groundbreaking here. Single-phase thermosiphons simply do not work for the power flux emitted by modern day CPUs, regardless of the elaborate heat exchanger design.

As a secondary HX heat pump it does work well (as proven by solar where you normally get 1kW/m2), it just doesn't work with CPUs which have about 1500x higher heat flux (up to 150W/cm2).

What part of "prototype" do you not understand?

 

[jesdals]

It was tested against a 360 mm rad because Der8auer didnt have a 240mm aio - he did tape the third of the rad over but it still had more rad mass

 

[Timbaloo]

It was tested against a 360 mm rad because Der8auer didnt have a 240mm aio - he did tape the third of the rad over but it still had more rad mass

Mass (more correct: thermal capacity) does not increase the performance in a steady state. It only increases the time to reach that steady state.

 

[Haile Selassie]

What part of "prototype" do you not understand?

Oh, plenty more than you might think. No amount of prototyping can overcome basic physics. Phase change is the key with high heat flux.

 

[DeathtoGnomes]

Much as I'd like to see this succeed, I doubt it will in the mass market.

 

[ZoneDymo]

"Aaah sh*t, here we go again"

 

[phanbuey]

It's extremely far behind... seems like even a basic air cooler crushes this thing.

 

[jesdals]

Mass (more correct: thermal capacity) does not increase the performance in a steady state. It only increases the time to reach that steady state.

Well He did say so as well but I would still perfer a 360 rad over a 240

 

[Nostras]

I read that as wireless and had to double check the date

 

[jesdals]

But actually it would be interesting to see a test of how much performance difference there is on a 360 AIO with 2x120 versus 3x320.

I am currently running 3x120mm in a push and 2x120 in a pull configuration, but it would be nice to know how much one sacrifyce with only 2x120 in e.g. a pull if there limited space for the GPU

 

[TechLurker]

I want to see this benched against the Ice Giant Prosiphon, which does well enough to compete with certain 360 AIOs due to its thick radiator core and its optimization for a push-pull config using rebranded Arctic fans.

As well, I wonder if radiator orientation matters too; the Ice Giant can only work in two orientations; vertically with the radiator allowing front-back airflow, and horizontally on a testbench, but can't work with the radiator facing up/down due to the flow design. I wonder if this will work in terms of being mounted on a front-intake, or even on a bottom intake (for those who still rotate/invert their mobos in certain case designs).

 

[Veseleil]

As much as I want this to became a mainstream, because I can't stand the high pitch noises, I'm afraid that any decent dual tower cooler will run circles around this.