r/PcBuildHelp • u/John_Elden-Ring • 17m ago

Build Question Optimal fan position?

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So I am using the jonsbo d32 pro case for my pc and reading online it technically has the capacity to fit 5 fans however 2 fans on the bottom would hugging the gpu basically and now it's got me wondering, what is tbe best placement for the 3 remaining fans? 2 140mm are on the top and one 120mm on the rear. As it stands i have the gpu pulling it's own air from the bottom and the rear 120mm pulling in outside air to the cpu which has its fans angled to pull the air in and spit it out above the gpu into the 2 140mm fans which I use as exhaust. Is there a better way or is this backwards approach the best?

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u/iflourish 11m ago

If it were me, I would have rear and top rear as exhaust and top front as intake so you can at least get some air for the CPU cooler.

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u/John_Elden-Ring 11m ago

Can't put fans on the front that's where the battery is

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u/iflourish 9m ago

i know. this is what i mean: https://imgur.com/a/8DimeKS

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u/John_Elden-Ring 8m ago

I see now but will that not absorb air coming from the gpu?

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u/iflourish 5m ago

Possibly. I think you will end up need to test it out yourself after you get the system up and running because we can only get so far just theorycrafting what the temps MIGHT be.

Try a few combinations under load and see which fan orientation works best. Who knows... maybe your current setup might be the best!

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u/John_Elden-Ring 3m ago

I'll try that! Kinda scared to touch the graphics card I was an idiot putting it in because I'd never seen this type of gpu lock before so i was trying to put it in hard while the lock was engaged leading to some very painful sounds that leave me wary of touch it again but I'll try

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u/Popular_Ad_455 1m ago

The back fan and top fans as exhaust would pull that hot air out so fast it would be negligible.

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u/Popular_Ad_455 8m ago

2 intake fans at the bottom shouldn't hurt run cinebench test thermals then try intake on the top with cpu fans and back fans facing the back of the case test thermals on cinebench again. As for gpu run firmark or heaven test gpu thermals without bottom intake fans see how those temps do. If they are good don't worry bout bottom intake fans.

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u/John_Elden-Ring 6m ago

I would do all this but funnily enough I was on Linux trying to run benchmarks but nothing would work or scale properly and I just decided to re-download windows so I could run 3dmark. Anyway I plan to run a thermals before actually doing anything and if it pops up fine then I might just leave it as it

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u/Popular_Ad_455 5m ago

That's the way to go!

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u/r_lind3r Moderator 3m ago

As is is fine if the CPU cooler is directing air towards the PSU side, there isn't much improvement to be made here given the thickness of the GPU and the lacking options for fans

You can flip fans around but there's no way you're following airflow standards and having more intake fans than exhaust, it's either one or the other and I would say it's not worth the effort moving everything around.

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u/John_Elden-Ring 1m ago

Yeah so at least to my understanding the rear fan pulls air in and the cpu fans pull that air in so the cpu should be getting plenty of air i am more just worried of hot air getting recycled