What is the Best Fan Configuration for your PC

Your computers GPU and CPU temperatures depend on your cases airflow, but does your case fan orientation really effect how cool your PC components are?

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[troytaylor]

In my dusty workshop, I use positive pressure with filtered air. It helps keep the dust-out. When I vacuum the shop I do the dust filter on the PC fan. Those used Snuggle drier sheets work very well as a filter with just one layer, I started using a piece of that on all my desktops.

[michaelkertes]

Correct me if I’m wrong, but having positive pressure with the all in setup means you can have all the air speed in the world but you still won’t be able to dissipate any of the heat because there’s nowhere for it to escape.

[Wu-Forever]

I don't understand why people put both top fans sucking out the case, when front fans blow cold in the front top fan is sucking it straight out before it even reaches the ram and cpu etc, best way is front and front top blowing in rear and rear top exhaust In my opinion always worked well for me

[tobiewolfen]

I added 2 intake fans on the side panel of my Corsair Vengeance C70 case because the front intake fans get choked by the drive cages in the front. This helped bring down the idle temperature by 12C.

[mr.aleximer]

One question which bothers me for a few days. What if you make your top 2 fans in the next setup:
1. One near the front panel as intake to boost cold air and help 3 front fans get in the cold air instead of "taking out" that cold air before it reaches CPU?
2. Second top fan above CPU and near rear panel to serve as an exhaust and help rear fan with hot air?

Again that one top front fan near front panel if set as an exhaust i am 99% sure it will steal that precious cold air and push it out before it reaches CPU.

[kyo-nil]

ive watched a few vids on this and it seems the better setups are to have to 2-3 fans in front and 1-2 on top exhaust, 1 bacck exhaust, im goin to start with sometiing like that

[charlie]

I had a 2 degree drop on my cpu when I switched my top aio from exhaust to intake. I have 3, 120mm fans front pulling air into the case, a 240mm aio also pulling air into the case and a single 120mm fan at the rear for exhaust. I never see any videos on this orientation. Of course I have a high air flow case with tons of perforations at the rear of the case.

[VndNvwYvvSvv]

Bottom and front in, top and rear out is more common for custom builds now. It can pull slightly cooler air in, especially on a hard floor.

[diegoosierra]

So the best setup is using 3 front intakes, 2 top exhaust and 1 back exhaust??? (In my case I use 140mm for front and top and a 120mm for back)

[CamaroWarrior]

I have a Lian Li Landcool lll RGB case and keeps farely cool inside🤔, all case fans at 90%

3x140mm front intake (stock rgb case fans)
3x120mm bottom intake (Asus ARGB TF120)
3x140mm top exhaust (Arctic P14)
1x140mm rear exhaust (stock case fan)

Ryzen 5800x /DeepCool AK620 (max 75-78c)
32gb ddr4 G.skill 3600mhz
Evga 3090 ftw3 ultra (max 75c)
1000w Corsair rx1000 psu bottom tray

[Patbach]

The all in setup should have just nothing either at the back or top, so that all positive pressure escapes on the same side

[justeddm]

I recently learnt that air cooled builds don't require lots of fans at the top one is enough at the top ..then 3 front and 1 at the back..For aio builds it's a different story though...

This was tested showing several fan configuration in the new lancool 3 by a certain YouTuber

[AgoraphobicNews]

How many fans should I buy for Thermaltake Core P8 Full tower?

[siputai]

Me, top 240 aio pull, exhaust... front 3 and rear 1 as intake.. cause my ancient am+3 need vrm and NB cooled😂

[dunknow]

Good tests to answer questions of fan setup direction for some

[DjinnCrimsora]

You forgot two key variables - 120mm vs 140mm fan sizes, and the thickness of the fan housing (most fan housing is 25mm thick, with some being 28mm like the Lian Li Uni v1/v2 or even some as thick as 30mm).

I'm personally debating on whether I should upgrade my system to having two of the Lian Li 140mm Uni v2s for my front intake then using dividing a 3-pack of their Uni v2 120mm fans to be two top/one rear exhaust. Pitched the idea to my cousin who built my PC for me & he was concerned about the possibility of going 3-exhaust/2-intake not being able to maintain a positive pressure airflow inside the case.

[callisto]

How about rear and front in and top out with an AIO CPU cooler with radiator at the top?

[rickss]

After decades of pc building and use I have concluded that the orientation or number of case fans have little effect overall. One will never see a substantial temperature drop on individual components from case fans...it is the cooling solutions on said components which will have the greatest effect. The more you can do to mitigate dust intrusion will have the greatest impact overall in the end.

[virgiliussantos]

And back and bottom in, front and top out?
I ask this to the GPU don't push hot air in the CPU

[HipocratesR]

I have 3 Deepcool fans intake (2front and 1 front floor) 2 top Corsair with thinner blades exhaust and the cooler master that came with case as rear exhaust, my PC won't reach 3 months without fans getting a thick film of dust, any suggestions?