[SOLVED] 8 fans in gaming case, which fans should blow air in and out ?.

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slippers1690

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Sep 29, 2016
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I have 8 fans, 3 at front blowing air in, 2 top blowing air in,1 back blowing air out. and 2 bottom blowing air in.

My thinking is that with 2 at bottom and 1 at bottom front would blow cold air that would help the graphic card keep cool.
The other 4 fans would help keep motherboard, cpu and ram cool.

What your thoughts on this guys ?
 
Solution
Phaaze88
UGH, who cares, as long as stuff isn't overheating.
The debate gets silly at times.

"I have 12-18 fans in my chassis", or whatever.
^AirFLOW over airBLOW. As already said, just because the space is there, doesn't mean it's practical/ideal; it's possible to make things worse by way of creating pockets of stagnant air.

@slippers1690
Just looking at your picture... almost half of those fans aren't even necessary; more for show than anything else.
1)Looks like those front fans are against a glass front panel, plus they're LED... I doubt they're bringing that much air in.
2)I'd bet the bottom fans are weaker than the fans on the gpu. This leads to the bottom fans just 'getting in the way'.
3)Adding to point 2: the psu, psu shroud...
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You're gonna want the bottom to blow air out, and the rear to blow air out so you can pull fresh air from the front and top. Your GPU pushes air away from the heatsink so trying to push fresh air into it is going to be working against it.
 
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Hi here is an image of my pc.
My rig

As you can see the bottom front one helps the air flow for the bottom two inside the case that also helps the graphic card keep cool because of that air flow between the 3 fans.
The other 4 two from the front and two from the top help keep motherboard ram ect cool.
I am gonna try the one on the top left blow air out instead of in so instead of 7 fans blowing in air i will have 6.
With 7 fans it does make the case feel like a fridge until i start playing games but that normal.
 
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ZeroDollarBudget said:
You're gonna want the bottom to blow air out
Click to expand...
huh? shouldn't the bottom fan act as an intake so it blows fresh air into the graphics card(s)?

ZeroDollarBudget said:
pull fresh air from the top
Click to expand...

This is sort of against physics, hot air is lighter so it tends to rise, therefore the top fans should help this hot air rise and get outside the case fast, blowing more air into the case from the top traps heat inside.

My rule is:
front and bottom = intake
top and rear = exhaust
 
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Good info i will check them idea's out and see what i come up with in temp wise ect.
my stats atm with 6 fans installed with 5 blowing air in and one at the back blowing air out.
Cpu temp 30c, motherboard 25c & graphic card 28c
 
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USAFRet said:
Fan direction isn't rocket science.
All you're trying to do is move air through the case.

In the front and bottom, out the top and back.
Fresh air in, old air out.
Click to expand...

This is it. ^

I've got 3 140's blowing in front... 1 140 blowing in bottom... 1 140 blowing out back... 3 120's blowing out (thru 360mm rad) top.

Not rocket science.
 
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UGH, who cares, as long as stuff isn't overheating.
The debate gets silly at times.

"I have 12-18 fans in my chassis", or whatever.
^AirFLOW over airBLOW. As already said, just because the space is there, doesn't mean it's practical/ideal; it's possible to make things worse by way of creating pockets of stagnant air.

@slippers1690
Just looking at your picture... almost half of those fans aren't even necessary; more for show than anything else.
1)Looks like those front fans are against a glass front panel, plus they're LED... I doubt they're bringing that much air in.
2)I'd bet the bottom fans are weaker than the fans on the gpu. This leads to the bottom fans just 'getting in the way'.
3)Adding to point 2: the psu, psu shroud, psu cables - and probably the HDD cage - make those bottom fans even more useless.

The 2 top and the 1 rear fan are the bare minimum that would work fine in that chassis. The other 5 aren't contributing that much to overall cooling.


But again, "Who cares, as long as stuff isn't overheating."
You do you, mate.
 
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Solution
Phaaze88 said:
2)I'd bet the bottom fans are weaker than the fans on the gpu. This leads to the bottom fans just 'getting in the way'.
3)Adding to point 2: the psu, psu shroud, psu cables - and probably the HDD cage - make those bottom fans even more useless.
Click to expand...

Heh... that's exactly why I only have 1 bottom fan... at the front end of the case. There's space for 2 more... but cables and PSU stuff get in the way so why bother...

I skipped the RGB though... everyone knows RGB raises temps and lowers FPS so that was definitely a no go. 😆😆😆
 
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@TravisPNW
Front-bottom intake should be more useful than bottom intake simply because there's more breathing room for the fan in that area.

I've played around a lot with fan setups in the following chassis:
CM H500P Mesh - even did a top panel mesh mod for it
NZXT Phantom 820
Phanteks Enthoo 719

With those last 2, I figured just how useless* bottom intake fans are.
*Useless is too strong a word here,but for them to be of any real help:
-they need to be high SP and audible. If they're running around the same rpm or noise level as the other fans, I can bet they're not doing much.
-the chassis needs to be of a reasonable height off the floor. Ex: one the best bottom intake chassis is CM's SL600M.
 
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Phaaze88 said:
@TravisPNW
Front-bottom intake should be more useful than bottom intake simply because there's more breathing room for the fan in that area.
Click to expand...

Mine is on a glass desk with about 1 inch bottom clearance... and running the same rpm as the other 140mm fans. Hard to say how useful it is... but it's definitely more useful than trying to put one where the PSU cabling... etc... is.

l0vODZd.jpg


I removed the front shroud to allow for that fan placement. As you said, as long as it's not overheating... who cares. :)

On a side note... I was pleasantly surprised a week or so after the build to watch Gamers Nexus "best cases of 2020" and this Fractal Design Meshify 2 made the list. I chose it because of the size and the mesh front/top... and not only did it make the best of 2020 list it won their "best mechanical design" for the ease in removing the panels.

I love it when others confirm I made a good choice... LOL
 
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TravisPNW said:
Mine is on a glass desk with about 1 inch bottom clearance... and running the same rpm as the other 140mm fans. Hard to say how useful it is... but it's definitely more useful than trying to put one where the PSU cabling... etc... is.

l0vODZd.jpg


I removed the front shroud to allow for that fan placement. As you said, as long as it's not overheating... who cares. :)

On a side note... I was pleasantly surprised a week or so after the build to watch Gamers Nexus "best cases of 2020" and this Fractal Design Meshify 2 made the list. I chose it because of the size and the mesh front/top... and not only did it make the best of 2020 list it won their "best mechanical design" for the ease in removing the panels.

I love it when others confirm I made a good choice... LOL
Click to expand...
wow... 20º CPU, where do you live in? Antarctica? 🤣
 
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carocuore said:
wow... 20º CPU, where do you live in? Antarctica? 🤣
Click to expand...

Heh... nah. The Pacific Northwest... Seattle metro area. I keep my place in the 60's F so the end result is PC and GPU both are generally in the 20-25C range at idle... GPU was running a little hot in this pic. 😆 The 20C (68F) CPU is a little above ambient temp. Lowest I've seen it is 19C.

LOL
 
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My fans are running as same as cpu fan.
Yeah led is just showing off but me likes led :).
Also the two fans at the bottom are on top not under were the psu is.

Well having these temps is normal for having 6 fans installed
Cpu temp 30c, motherboard 25c & graphic card 28c
max temp when playing games
Cpu temp 41c , motherboard 31c & graphic card 77c


I guess at the end of the day the air flow the way i want it and keeps the pc cool
 
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