Question 360mm vs 420mm - - - there's only 1% difference in performance?

[cyprusxx]

im trying to decided between these two Radiator sizes but performance wise its only 1% difference but limits you greatly for case choice. Is this true i thought the difference would be greater for the i9-14900K

according to this video

View: https://www.youtube.com/watch?v=VDB3ZBHh5Rk&t=523s&ab_channel=HardwareCanucks

 

[hotaru.hino]

Most of the cooling in an AIO is done where the first fan is at, simply because of the thermodynamic principle that the greater the temperature difference between two systems, the faster the heat transfer is between them. So the water going into the radiator is the hottest at that point, which has the highest temperature difference between it and the air being blown over the radiator fins. In addition, since the cooled water goes through the same side as the hot water coming in, it's going to take on some of the heat from the hot water, but it can't be cooled as much as the hot water will be because its temperature difference from the surrounding air isn't as large.

In addition, if something is water cooled, its maximum temperature is going to be capped at 100C until the water boils off.

EDIT: Also the amount of air that the 280mm and 360mm fans are moving at max speed and the amount of stuff the radiators can hold is within 10% of each other. But depending on the construction of the radiator and how the fans are tuned, that 10% may not really matter.

 

[ilukey77]

yes a 420mm would be better than the 360mm on a 14900k ..

there is diminishing returns on using a 420mm on say a 14600k over a 360mm..

the 420 will cool better but so slightly on a lower CPU its not worth the extra cost on little to no gain !!

 

[cyprusxx]

my issues is the choice of cases is soo much less on a 420. Does anyone know any cool 420 cases?

 

[Why_Me]

my issues is the choice of cases is soo much less on a 420. Does anyone know any cool 420 cases?

https://pcpartpicker.com/search/?q=LIAN+LI+Lancool+III

LANCOOL III

<ul> <li aria-level="1">Mid-tower modular chassis for all kinds of configurations</li> <li aria-level="1">Equipped with 4 × 140 PWM fans (ARGB or non-RGB)</li> <li aria-level="1">Featured airflow optimized mesh structure and hinged side panels</li> <li aria-level="1">Supports up to 420...

lian-li.com

 

[CountMike]

"Choke point" on any cooler is core to IHS to cooler contact. Most liquid coolers use same heat exchange and pump with all radiator sizes so that part is a constant. Larger radiators can handle more heat energy because of larger surface and liquid volume but that helps only with long, continuous high loads. In most applications such loads are rare so no much difference in temperatures with smaller or larger coolers/radiators. If you expect prolonged high loads, larger radiators and fans are way to go.

 

[ilukey77]

my issues is the choice of cases is soo much less on a 420. Does anyone know any cool 420 cases?

depends on which 420mm AIO you use the generic ones should fit in most cases that support 420mm rads the arctic freezer ii 420 has a thicker rad so less options !!

 

[TerryLaze]

im trying to decided between these two Radiator sizes but performance wise its only 1% difference but limits you greatly for case choice. Is this true i thought the difference would be greater for the i9-14900K

according to this video

And as you saw in the video the "big" difference is in the temps, if the additional price and case issue is worth it to you to have 85 instead of 90 degrees at 35 decibels then it's worth it.

 

[cyprusxx]

And as you saw in the video the "big" difference is in the temps, if the additional price and case issue is worth it to you to have 85 instead of 90 degrees at 35 decibels then it's worth it.

any cases recommendations?