200mm vs 120mm on Radiator configuration

[Darziak]

I've got a 3090 card which has a radiator and 2 120mm fans connected to it. I've also got a aio for the cpu which also has 2 120mm fans, but my case has 2 200mm fans.

My question is should I keep the 120mm fans attached to the radiator and remove the 200mm fans or do the opposite?

I know I can't use both because of the that would mess with the fan speed and such.

The Top of the case gets taken by one and the only space left is the front.
New GPU not installed yet as shown in this picture.

 

[Darziak]

Really interesting question; why not test it??

I wanted to see peoples opinions before doing it.

I can't see what the mounting is like but could you keep the top 200mm and mount the graphics cooler in the bottom position?

The front is 200mm, I could mount the GPU radiator to the bottom but airflow would be bad and with the heat that it generates it would probably kill off my PSU on long gaming sessions.


I'll have a go with mounting the CPU radiator to the front keeping the two 200mm fans. it kept to 30c with the two 120mm fans.

Interesting, 200mm provides 24c on idle instead of 30c from 120mm. I thought it would be more hotter because the fans aren't purely concentrating through the radiator.

 

[Darziak]

How about keep the 200's in place and have the 120,s in pull config on rad mounted behind your 200's

I've seen multiple tech channels say that's not a good idea because of the different fans giving different airflow speeds.

 

[Darziak]

I've mounted the CPU radiator (240mm) to the front, using the two 200mm fans which gives a idle 25°c from the pump.
The GPU Radiator (240mm) I mounted to the top with an idle of 28°c. The two 120mm fans attached to the GPU radiator have the wires going into the GPU itself so I'm unable to remove them without having to take apart the GPU.
PSU is facing down.

Fans are set to pull in from front and out from back and top.

Setup looks to be working fine, staying below 70°c when running a game.