Air Flow

Does this fan placement make sense? Post yours

Jesus christ. Only two intakes? You built an oven

no retard hot air rises

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How the fuck do you have you fans blowing downward, is your mobile upside down? You hot air is vented from the sides and up, or if it's a blower, out the back. Bottom of you is always intake.

You never, ever, blow heat downwards.

You fucking retard the GPU and PSU don't blow downwards those are fucking intake fans.

Not OP but my PSU intakes air from the back and blows it out the bottom

aren't most PSUs like this?

I don't know about your PSU in particular but most intake air using the fan and exhaust it out the back, just like a reference GPU.

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I use an H440, it cripples fan placement anyway but I try my best.

Thanks, I think I'll set it up in this arrangement

Had one user. Radiator was crippling because of the shitty blocked entrance.

Anyone using this case?

>not falling for the positive pressure meme

>All those drive bays

What an atrocity.

Intake and outtake fans are redundant. You only need one or the other. That's a good PC case for you because it prevents you from indulging in your natural tendency to do something wasteful and retarded.

Some people actually use them.

Hot air rises only because hot air is a lower density than cold air. If you have high pressure fans you can make the air go anywhere you want with no loss of efficiency. It's the same principle as with water, buoyant force. Think of it this way: his plan is also just as good because he plans on having cold air FALL into his case.

so... you are shooting hot air INTO your machine?

I have a haf 912, almost the same but no bottom fan

Filters on all intakes. Side fan to blow air on gpu and keep it passive for all but gaming (easier to change than a gpu fan) and to keep positive pressure, rear fan to cpu so there is never any stagnant air around the vrms even if chassis fans haven't ramped yet. Been running cool enough even on the real hot days (no a/c)

That's retarded.

>coolant is hot
>coolant goes to radiator
>coolant is cool
>coolant goes to resovoir
>resovoir is heated by radiator exhaust
>coolant is hot
>coolant goes to processor
smart

Stunning rebuttal. The forces for hot air to "rise" and cold air to "sink" are equal. Either way you're fighting one or the other.

>he doesn't alternate hdds and powerful electromagnets in the drivebays with a kill switch to nuke the hdds

This. Always put radiators in the front too because you want your cpu the coolest anyway and also if they leak they don't get on anything.

If you can get your radiator out of the case do it.

Also fans with sleeve bearings (sometimes) like to have a horizontal spindle so their oil lubrication doesn't fall out. Hopefully GPU and PSU fan manufacturers have dealt with this since most of those fans are vertical spindle. But normal case fans better to just mount the radiator vertically. Check any USB dongle protrusions - the frame could be a good thing for protection, could be bad and not fit.

I have 5 intakes and 0 out (except the GPU cooler). 2 top, 2 front, 1 rear. All fans have filters. I live in a very dusty environment so I like as much positive pressure as possible so dust doesn't get pulled in all the random openings in the case.

less intakes is better. low pressure system will suck out hot air faster than high pressure.. that will build hot pockets

EK has mounts for this type of thing.

>doesn't want his PC to build him pepperoni hot pockets

>putting that garbage in your body
fat fucks

Running it negative pressure so all of the cool air is passively induced while the hot is actively removed. Strangely enough it's the most effective method of cooling this case with three fans. It is unfortunately somewhat of a dust magnet, but it was also built to be one in the first place so I can't really complain given that it runs silent.

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idle

>having to fight the natural upward force of hot air
>"no loss of efficiency"

You're an idiot.

If convection is that powerful, where are all the convection chimney cooled PCs?

The convection that takes place inside your case is negligible at best.

I was thinking about getting a top exhaust and maybe side intake. Should I?
Temps go to ~78C on prime95 + AVX, but it's summer here.
Also it's a 6700k at 4.5/1.29V, not delided.

Convection is irrelevant in a computer case UNLESS your system is entirely passive.
A single 40mm fan spinning at 500RPM will completely overpower convection.

naw, it just gets hot as cold air from outside goes over the radiator and into the case to be ejected out the back fan

It's a good case, used for like 5 years

exhaust? its a closed system with a little pump and a fan..

t. Amerifat

Computer components get very hot, that hot air rises very quickly.

Stop being ignorant.

That hot air rises because it's pushed by fans.

You're an idiot.

No.
Your PSU sucks air in from the bottom and exhausts out the back. Your GPU either pushes air out hte back or just moves air around the case.
Hot air rises.

>that hot air rises very quickly

It rises quickly when there's metric fucktonnes of it floating around in the atmosphere, when there's a barely measurable weight of air drifting about in your PC the effect is negligible.

Where are all the Chimney PCs taking advantage of this amazing motive power?

Stop this bullshit.

There is as much air proportionally in your computer case as there is in your house or outside. Maybe a tiny bit more or less depending on how you set it up.
But it is a confined space, so air movement has to be regulated correctly to emulate open air.

Stop posting. Right now.

Planning your airflow inside the case while keeping convection in mind is like planning a trans-atlantic while keeping flat-earth theory in mind.

It's amusing, but you're not making best use of the information available to you.

Components in your computer can easily reach about 70 to 90°C. Have you ever seen air rise off surfaces that hot?

You're a retard if you think the effect on air flow is negligible.

Sure, your computer might work and actually cool, but it's simply inefficient and entirely unnecessary.

radiator is noticeably more effective when it sucks in fresh air. the higher the temperature gradient, the faster the exchange.

>Have you ever seen air rise off surfaces that hot?

No, because we're blowing cool air over those surfaces, no convection has a chance to get going.

Are you about to post a picture of a thunderstorm and be all "Still think convection is weak brah?"

Because we all run case fans at 100% duty. What about when the pc is idle and air flow is reduced because I use proper cooling with fan curves?
>laminar airflow is stoopid
only on Sup Forums

Warm air is ALWAYS trying to rise. You have to fight against that. For no reason whatsoever.

That means a loss of efficiency.

A negligible one.

Unless you have the numbers on this, it's up for debate.

The point is that it's completely and utterly unnecessary to work AGAINST basic laws of physics when you can simply position the fans to work WITH them.

Antec 300, cheap arctic cooling fans controlled by speedfan, $15 cpu cooler on 125W cpu.

Runs very nice, 30C ambient idle/light load fans are at 6% which is lowest possible setting and inaudible. Playing BF4 fans get to 50%, still reasonably quiet.

Wrong pic...

Will a case that supports 240 mm radiators be able to use a 120 mm water cooler?

Pleaze be gentle I am beginner :3

Fans moving air have much more influence than warm air rising, you're free to disprove this. Either way, the difference is certainly negligible.

Car engines have much more influence than inclines, but it still takes more power to get up a hill in a car.

With computer air flow, you have the ability to go downhill literally 100%, so why choose to go uphill?

Meanwhile your PC will be filled with dust. High pressure is better, temperature difference will be negligible.

Not him, but there might be a situation where you would prefer to have an intake at the top. For example, if you really want the coldest radiator temps, and the only place for the radiator is at the top. The comparison of a car versus convection is skewed as well, the difference in needing to move a 2 tonne vehicle and not is much larger than needing to push hot air down or up.
If you can avoid it, sure, work with convection. But if there's any reason why you'd prefer to not work with convection, then there's no problem with working against it.

>the difference in needing to move a 2 tonne vehicle and not is much larger than needing to push hot air down or up
Because that was the point of the comparison, right?

I wouldn't think so, I thought the point was that they're similar, not different.

Listen here, knucklehead; the point of the comparison was that you can force hot air down just like you can force a car uphill, but that it's better not to have to force anything if you don't have to.

I knew that, I added to that that there's a real benefit with cars while there's no real benefit (a negligible one) for convection. So the comparison is a bit skewed. I didn't say it was wrong or incorrect.

The proportional force is completely irrelevant to the comparison.

I disagree because the whole reason people say that convection is irrelevant is because of the proportional force. If you ignore the one part that makes it negligible, then yeah it's not negligible. But that's like saying a car's a plane (if it could fly).
Unless you just wanted to throw out a completely irrelevant comparison, in which case you can just make the stupidest comparisons you want I guess.

Anyone else here using ambient case temps to control their case fans?

You can make an incline require the EXACT same proportional force as whatever "downward intake" airflow setup you have.

You could always lay it on it's side

Hello little brother

Okay, make the following experiment: heat something to 70°C (doesn't have to be your CPU) and see how fast air is rising above it. Then take your smallest fan and let it run at minimum speed and check again. There will be magnitudes between pressure and air flow. If the buoyant force of convection is 1% of the fan power, you're arguing that 102% is better than 99%. It is, but no one gives a shit.

With a shitty small incline or incredibly lightweight car maybe, but I assumed you mean representative inclines/cars. Even so, at that point it's negligible as well.
>There will be magnitudes between pressure and air flow.
Bullshit.

>If the buoyant force of convection is 1% of the fan power, you're arguing that 102% is better than 99%. It is, but no one gives a shit.
I think you got that the wrong way around. I'm arguing that the difference is negligible, not that one's better.

>With a shitty small incline or incredibly lightweight car maybe, but I assumed you mean representative inclines/cars
It doesn't matter; regardless how small the incline, the engine has to work harder. Over time it does add up.

Proportionality has NOTHING to do with the comparison between forcing warm air down and forcing a car up an incline.

>I assumed you mean representative inclines/cars
What the hell is a "representative incline"?
Pretty much 99.99999% of all road surfaces are on a slight incline.

>It doesn't matter; regardless how small the incline, the engine has to work harder. Over time it does add up.
But with cars it's not really negligible, and with fans it is. There's a distinction here, one is a valid comparison while the other is hardly related.

>Proportionality has NOTHING to do with the comparison between forcing warm air down and forcing a car up an incline.
Again, it does if the important part is if something is negligible or not. The fact that one's a bigger difference means you can't compare how negligible they are to each other.
>What the hell is a "representative incline"?
Something significant. Like 10-15 degrees I guess?

>Pretty much 99.99999% of all road surfaces are on a slight incline.
Obviously not all, since then it wouldn't make sense to define them as inclines. Something that's inclined enough compared to "normal" roads to be justified to be called an incline and not a normal road.

Is there a case like spec-02 where you just throw your hdd in the slot without any tools? Preferably under $100. I've tried two other cases with pic related and this crap makes my hdds vibrate like crazy

Old style mounting with screws is also good for me

I built a tower for family several years back using it.

It works alright, airflow is decent. Not dust filters though so it gets dirty quick

no

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whats your fanspeed in summer ?
do you open the case or leave it closed ?

The design of the fan will have a much bigger impact on the stress and power usage of the system than which ever way the air is being pushed. A sleeve bearing fan will be more stressed horizontally, no matter if its pushing air up or down.

Pretty dusty setup then.
You'll want positive or even better neutural pressure to prevent dust

this is so wrong, shitpost alert.

Good luck with the dust.

/thread

fuck off nigger OP

This x6 gorillion. Always run more intakes with dust covers than exhaust. Top mounted fans/rads are a meme 9/10 too.

>But with cars it's not really negligible, and with fans it is.
That depends entirely on the incline.

>Obviously not all, since then it wouldn't make sense to define them as inclines.
Virtually zero roads are perfectly level.
Hence: they nearly all have some incline to them.

This discussion was never about proportionality, it was always about efficiency. See And regardless how small the loss of efficiency, there is still loss of efficiency.

And the biggest point of all is that it's completely unnecessary.

All else being equal, having to force hot air down is less efficient than simply following the flow.

Same setup in my case

I'm and top mounted aren't bad, you just have to have more intakes than exhausts or fans that push more air in than out.

3x GT-AP15 as front intake
4x GT-AP13 as side intake
3x GT-AP11 as exhaust at the top.
1x Corsair AF 140mm that has been changed since pic was taken.

Fractal Define S. Historic case.

See that giant ass (relative to the rest of the case) fan? I have it in an intake position. Would there be any benefit to having it in an outtake position?
I've seen what you guys are saying about hot air rising, but the only thing here is that it's the *only* proper fan other than the fan on my GPU, so now I'm really not sure

>That depends entirely on the incline.
Yes, I know. Which is why I said and tried to define representative.

>Virtually zero roads are perfectly level.
>Hence: they nearly all have some incline to them.
Yes I know, however that doesn't qualify them to be qualified as inclines towards regular roads. I already posted this, please read before you reply. This is a shitty semantic discussion which implies that your example is so loosely defined that it doesn't mean shit.

>This discussion was never about proportionality, it was always about efficiency. See
We're discussing if the efficiency is relevant, by discussing if the proportionality between examples is similar. I think the efficiency is irrelevant, and that your example is skewed because it ignores how relevant the efficiency can be. The relevancy of the efficiency is the only deciding factor in if convection is relevant or not.
>And the biggest point of all is that it's completely unnecessary.
In a perfect situation, yes. However, I already posted an example of a non-perfect situation. It's the post that I entered this argument in with. So no, it's not "completely unnecessary" per se.

I'll just repeat my original point: If you can avoid it, sure, work with convection. But if there's any reason why you'd prefer to not work with convection, then there's no problem with working against it.