PC Airflow Explained for Beginners 👉 Tips & Common Mistakes to AVOID!

[@theTechNotice]

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[@magizzaofficial6260]

I have a 240 mm radiator at the top pushing air inside from the top and 1 exhaust at the back and 3 exhaust fans at the side of the pc pushing air outside. What is the best fan placement i can do to get the best airflow in my pc. My PC casing is 011 dynamic. Please Help!

[@creed5248]

When I started buliding there was hardly any airflow on cases at all . Most people would overheat and take the side panel completely off and some like myself would fabricate front and top fan locations ourselves .

[@AlexButler10]

Yep, back in the 90’s we made our own haha. I’d used a hoover once to force air over a cooler to try and overlock higher 🤦🏻‍♂️. Was fun in those days, all you needed was a drill and a bunch of old fans.

[@ericshutter5305]

nonsense, you just bought the wrong cases...

[@chipsalom]

​@jacekmakesyep. The cases with airflow like we have today weren't existent in the 90s. You were lucky if you had even a small side panel fan port. Cases were coffins with solid front, top, and bottom panels, PSUs at the top that had nowhere to really breathe except their exhaust... So yep, we would fabricate our own aftermarket case components or cut new airflow points. Even graphics cards in their early days had poor heatsinks and no active cooling (looking at cards like the Voodoo series, etc, lol).

[@asysjr]

Those old ( and ugly ) cases from 90s have only one fan to exaust, and thats all.

[@corpingtons]

Right

[@Mr_Matt_Lee]

Great video buddy! Enjoyed hearing your thoughts and addressing some of the common misconceptions about cooling in general. In depth, well explained and easy to digest. Thanks for the channel mention too, much love 🙌

[@theTechNotice]

Glad you enjoyed it! I just need your smoke machine now haha!

[@WR3XKA]

Can you tell me what pc case is used in this video ??

[@Sokol10]

@@WR3XKA Ir you mean the case in Mr. Mat Lee video showing airflow with smoke it's Fractal design Pop Air Mini. It's their video: "The MATX Master of All?! | Fractal Pop Mini Air Gaming PC Build | AMD Ryzen 7600, Radeon RX 6750 XT"

[@kevinsubarta5159]

@@theTechNotice I watched a lot of videos, and none of them explain as detailed and easier to understand than you did, thank you!

[@alrizo1115]

Just to add: negative pressure is mostly beneficial to crammed components like in a mini ITX system. You want the heat to get out asap and not stay inside especially if there is no space. There is also the nzxt h500 with an almost restrictive front panel which benefits from negative air pressure. You can also force cases to have positive pressure even if there are more exhaust fans than intake. Just decrease the rpm of all exhaust fans and increase the rpm of intake. Vice versa if you opt for negative pressure.

[@mikemadske946]

to make it more complex. you need the capacity of each fan.. fresh air should be 85% to 90% of the exhaust fan capacity. and also get the air change require as per volume of casing😂

[@corpingtons]

That’s right

[@corpingtons]

Yes

[@RiverReeves23]

Love your videos man. I worked in a PC shop, building PCs from 15-20yrs and then stopped using PCs for 20 years. Coming back to it, it really helps to watch your videos. A lot has changed and you have educated me in a really clear and fun way. Keep it up, absolutely excellent content. Cheers man.

[@tminusoftexas3224]

A lot of people do these videos but it’s important to revisit as the cases change Thank you for this video sir.

[@theTechNotice]

True!

[@JacobGagoOfficial]

Digging the afro record. Wish it was lower a bit when you spoke. Great video.

[@garyrichards6079]

You forgot to mention that with AIR tower cooler like your NOCTUA D15 the fans can over hang the tower fins providing AIR flow over your VRM's, RAM and NVME heatsinks which a AIO CPU block normally doesn't do .. That can also help keep your system run cooler . btw good video thou , nice and simple to the point :)

[@el.G.]

Some AIO provide cooling for VRMs, an example is arctic liquid freezer 3, also 2 but less

[@matthewheben6161]

Finally! Someone who does an on-depth and easy to understand explanation about airflow in a PC case! I feel like there are so many unanswered and unsolved questions regarding airflow. This is a big piece of the puzzle for me! Thank you!

[@theTechNotice]

Glad it was helpful!

[@brianoconner3090]

This is one of the most detailed explanation for this topic on KZbin. Great work and thank you.

[@VicharB]

Logic and physics dictates, the best is Front=intake, Back=out, top AIO (if you have)=out. I accordingly chose the case (Cougar Uniface 4 fans) and went with this setup. All the extra is not needed. Tunes the fans per CPU% and MB%. The result, my Ryzen 7700 with PBO+CO with TjMax=88C, gives me close to 5.25-5.35Ghz All-core, 5.5Ghz Single core, idle = 45-50C, load max as per TjMax 88C, with AIO fans running dynamic with max set @80% and case fans max at 70%, with lower temps they get slower. Where I sit, ear level: idle/browsing/video 25-30db, full load 33-38db. Close to perfect performance/noise/cooling.

[@wiktorbednarz229]

short version, possitive preassure good, negative preassure bad (not in all cases), 1 more intake then exhaust and you should be fine 3 fans is minimum, 5 is good best balance, 7+ is Enthusiast dont make air do sharp turns make it as straight as possible

[@ThePCExpertAmateur]

Very good, but you may not be aware that there's more to it than LxWxD and fan rotation. There are a small number of fans that actually use the convex side of the fan to push air, like the Geometric Future Squama. There are fans that have the blades with the *convex* side opposite where it is normally but STILL move air in the expected direction because they are actually designed to push air towards those arms that connect the frame to the hub, and there are reverse fans, of which I've seen both combinations. Also, even now, there are a significant number of fans that do not show direction of flow and rotation, or it's located in a hard-to see-location. So, in order to determine direction of flow and rotation, you have to look at the blades - for most fans the convex side is the BACK and the other side is pushing the air through. If, however, the back (convex) side is modified with a pattern that is not on the other side, it may be that the convex side is pushing the air instead of the concave side. 99% of the time, you won't see this and can rely on concave being the push side and, thus, whichever direction the blades are scooped in (concave) also indicates the direction of rotation. I wish you had been explicit about what the problems are with negative pressure: dust will build on on the inside of dust filters, on heatsinks and radiators, among many other places, more rapidly (depending on the room), which will require that cleanings (with a decent speciaiized vacuum/blower) than in a positive-pressure case. Also, if you have pets, their hair and dander will be pulled in. If you have positive pressure, though, most of that will be trapped in the dust filters where air is pulled in, simplifying clean-up. I'm glad you pointed out about neutral pressure, but it would've been useful to go into more detail on the non-curve aspects of configuring the case fans. It is really hard to optimize a case to eliminate turbulence and recirculation, and sometimes a more complex fan config will do a better job. Overall, though, and considering just how many variables there are that affect airflow this was quite good!

[@giorgosapo4508]

Incredible video! Thank you

[@theTechNotice]

Our pleasure!

[@ralkey]

I have learned everything there is to know about airflow for the last month. One thing I don't see people teach is: How many fans do you need, And how do you handle the situation when you have more fans than your motherboard supports.

[@greenmarine5]

if you have the correct CFM fans you only need one intake and one exhaust, everything else is not needed and is for bragging rights only

[@ralkey]

@@greenmarine5 what if the fans you got are largely different in CFM. I got 3 x 90 CFM (from the case), 1 x 72 CFM, and 3 x 56 CFM (from the AIO). front, back and top in order. This is really hard to balance out without scrapping ALL the fans I get with my purchase and just getting 7 custom fans.

[@slevinlaine]

4:10 THANK YOU so much, I was looking for the orientation of the fan, and finally I found someone who can tell me. Cheers mate! You earned a subscriber.

[@antonioiozzi291]

As an ex gliderpilot and aerodynamic teacher in my flying club I agree with all your explaination. Good job! I see so many terrible fans layout because people don't know what turbolence are.

[@smartbull6382]

Fantastic video, I’m looking at building my first pc. And this video has really helped me with deciding if/how many/where to add extra fans to my case. I was thinking about adding an extra exhaust fan, but now I know I’ll probably be better served to supplement the two intake fans pulling through the filter.

[@micahhurley4146]

actually helpful, i flipped some of my fans because they werent in the optimal position and dropped my cpu temps by 5c and gpu by 2c

[@vh9network]

Airflow works better if you use a ATX mid tower case and not those little Micro-ATX or even worse ITX cases. My Fractal Design Torrent case is an Airflow master coupled with a push-pull configured Noctua NH-U14S heatsink fan for my 2990WX.

[@theTechNotice]

Torrent is the best for airflow!

[@stephenxs8354]

you forget rgb = 100% boost.

[@muszeuhs]

what a tiresome joke

[@LeGeeked.]

@@muszeuhsur tiresome, let the man have his rgb joke

[@pumkin610]

​@@LeGeeked.Roasted 😂

[@ELCrisler]

Good video but surprised you did not discuss the difference between Static Pressure and Air Flow on fan choice. For general case fans you want to focus more on air flow than static pressure. These fans are about creating air movement. When you want to focus on pressure is when the fan is against a cooler or radiator and you need to overcome the air flow restrictions these create.

Static on the motherboard is bad.

[@suhy9861]

Not at all what that comment meant😂 static pressure means "how much air can the fan push through something like a radiator or a filter" not static electricity, very, very, very different things

[@suhy9861]

Thats the only mistake i made, all 13 of the fans in my case are Corsair SP120 RGB Elites, all static pressure fans😂 but hey my temps are amazing anyway so I'll be changing that when i huild a whole new system i guess

[@greenmarine5]

what you are referring to as "air flow" is called CFM "Cubic feet per minute". Many new builders just buy fans that look cool or are RGB, always look for the Highest CFM with the lowest DB value

[@cheekster777]

Thank you Lauri.

[@ChairmanMeow1]

Honestly I just keep it simple. Air pulled in from the front (3x120mm), and one 120mm from underneath. One 120mm and one 80mm blowing it out the back. It all blows over the CPU and GPU and out the back (two more 120mm fans attached to cooler tower). I have heard people say thats a "negative pressure" build but tbh I dont know exactly what they're talking about. All my temps are more than acceptable so idk, works for me. As for telling what direction to orient fans, the back (exhaust) always has the bracket.

[@SaltetDweeb]

Really nice video! Had my case built around positive pressure because of different recommendations, but this really helped me understand the logic behind it better!

[@whateveryoucall7031]

best video explanation airflow on ytb. Thank you man. Keep up the good work

[@theTechNotice]

Glad it helped

[@furioustester4056]

The dimensions of a fan do directly change the amount of air it pushes, but, it can also push the same amount if the pitch is changed accordingly, you need to look at the pitch, amount of blades, the change in pitch, depth, radius or diameter, and speed. And the dependant variables are the static pressure, air speed, total amount of air passing through the fan and noise. Go check out major hardware, he does cystom fan competitions that kinda show how it works

[@sc0or]

Just unmount a fan behind a dust mesh/filter and you'll get an idea where is all the dust. That mesh simply does not work (obviously because dust particles is WAY smaller than a 1mm filter hole). Or rather it works in a not expected way (just shapes an air flow)

[@greenmarine5]

excellent point, the only thing mesh does is collect dust and limit air flow over time, in addition plastic and glass cases are a dust Magnet because of environment static.

[@reloadingdontshoot1]

As someone with an open frame case, this video does not apply to me. I'm so glad I switched; less fans, less cost, easier swapability. Overall the info in this vid are great though well done. Esp taking the filter off exhaust; people don't realize you only need those for intake People don't realize these new Lian Li cases with all the glass nonsense is hurting cooling, as you have less fans, and fans not in the correct spots. The OG 011 is the best and always will be Also, intake on the bottom is fresh air for the GPU; the GPU isn't blocking it, it's using it. Then it exhausts it itself. So the GPU isn't "in the way" at all. You want quiet? Use a headset. Turn the fans up, get better temps/performance, and you won't hear a thing

[@dreyga2]

GPU produces more heat than any component. Where is the exhaust for the GPU? Big L The backplate traps heat under it, causing higher temps for the GPU. Another L That's ok, it has cool RGB:)

[@Anthony-fd8mh]

I have a Corsair 7000D case. I have 3-140mm intakes on the front 1-120mm on the side. 3-140mm intake on top which is the 420mm AIO and 1-140mm exhaust on the back. So far after 6 months of running every day (turned off at night) I have just a fine light dusting of dust inside which is whatever makes it past the filter and is easily blown out. I have cleaned the filters like 2 times. I should also say that my hvac register is on the ceiling behind me and the computer is on the floor on a tile. When the air comes in it blows across the room right on my computer so it stays pretty cool. In the winter I just close the vent a bit and the computer help heats the room. So far seems to be working pretty well.

[@dalek.6171]

I have that case too. So incredibly Heavy.

[@Anthony-fd8mh]

@@dalek.6171 yup it’s a biggie, but was fun to build in due to all the room.

[@dianaalyssa8726]

@@dalek.6171 Also have, It's heavy and huge but was easy to cable manage.

[@hermit1255]

I have three big intakes at front, one exhaust fan top of the back of the case for exhaust. Simple and gives me very good temps for both GPU and CPU. Might add another small exhaust fan at the bottom back to aid air flow along the bottom of the case (thus feeding the GPU fans with more cool air and maybe one at the rear of the top of the case. I don't need either honestly though. Sometimes keeping it simple works best. Some good advice is to use a piece of paper and see where your air is already flowing then add fans where it'll aid weaker flow. Or stress your system and feel with your hand where your case is trying to vent heat and again add where it'll help.

[@emilcost8613]

Excellent video!!! Wow, you covered so much here... thank you very much! Subbed

[@bryanpascual3543]

I recently built my PC with H5 flow. I set on slight positive air pressure so the GPU fan is pulling cool air from the bottom case 😎

[@rogier75]

Nice video again. Nice Jacket too, half way the video i thought "did he just won the Golf Masters on Augusta between all these fans?"

[@marcinszukielojc2874]

Yep i am running 13 fans, 3 120 mm bottom fans intakes 1 120 mm fan exhaust 3 120mm top fans exhaust and 6 side fans with my AIO CpU Cooler with the push pull confirmation on NZXT H9 Elite case

[@VS-px2qt]

Thanks for all this info, is very easy to understand!

[@creed5248]

Wonder why Whokeys triggers memories of Dr. Suess ? LoL !!

[@j_shelby_damnwird]

"Norton hears a Whokey" Dr. Seuss

[@damnbrosky]

Hey boss, I was watching tons of ventylation videos and finally I decidet to stay with positive preasure and i figure out it just same way you explained it here, I have 6 fans pushing air in but with mesh and 4 pushing out but without mesh, to justifying this choice I have say that my house is kind a dusty, I work on construction side and I bringing home everyday some dust with me, this is cleaning nightmare, but.... Some how my PC inside is super clean and that is miracle, so lets say little bit of positive is always better than negative, in life and in PC

[@Viewable11]

Basics of air PC case flow: All air that goes in must come out. This means intake fans are useless or even harmful. Warm air rises upwards on its own. Laminar air flow has less internal friction than turbulent air flow. Turbulent air flow is caused by obstacles in the air flow which can be hardware or air overpressure regions. Turbulent air flow is louder and slower and rather random in its direction than laminar air flow. Practical applications: No intake fans. Place as many exhaust fans as possible as high as possible at the case while ensuring that the cool air flows in a straight line through the hot components GPU and CPU. Optimal solution: A) Many large bottom air intake case openings, air gets sucked upwards by GPU fans, CPU fan and three big case exhaust fans at the top of the case in a straight line. Slightly less optimal solution B) Back side case air intake opening, air gets sucked through the case towards front by the CPU fan and three big front exhaust fans. The GPU fans have air flow orientation orthogonal to the overall air flow which is bad because it causes turbulence which means reduced cooling efficiency and increased noise.

[@C-M-E]

Side rant on technicality, but this is coming from a 'the more you know' end effect. In atmospheric air movers, there's no negative pressure, only High and Low pressure areas. Fans work on creating a Low Pressure Zone, where higher ambient pressure is being pushed into the area of effect; popular case study, jet engines are often attributed to having 'suction', whereas this is a misunderstanding of physics. This is true of fans, 'vacuum' cleaners, turbojet intakes, etc. The closest you can get to Zero pressure is in outer space, simply because there is no air (as we know it; not going into dark matter disputes). Pulling inches of mercury is a different scale, but even though the gauge has a - symbol on it, it is still measuring the Absence of air pressure, not a negative value. For metrics, a less advanced meter will read either positive pressure or 'vacuum', but it's _barely_ relaying that the device is minutely lowering ambient pressure directly at the site of induction, whereas on the back side, ambient air pressure is still applied and you're merely creating airflow. If you want a bit more hard proof, invest in a decent manometer and put the probe/sensor on the inside of the pc case and then again on the outside. To save a bit of disappointment, atmospheric pressure won't change, as the PC case is still open to atmospheric pressure inside and out (vents, exhausts, etc). At least after acquiring a manometer, you can still use it to calculate how much flow your fans and such are actually producing, especially useful for eliminating bottlenecks or seeing how you can optimize static pressure fans for hard obstructions like radiators.

[@NotAGrandMaster]

Wow, great in-depth video on airflow. I really enjoyed it.

[@Kapono5150]

I just did a build in this case and it’s soo freaking Sexy!!!

[@MandeepSZN]

Just realised my pc has the most optimal airflow as possible as he described

[@RedHotUzumaki]

recently purchased the msi velox 100r, installed a pair of intake fans on the inside fan mount, it has a total of 8 fans in the case. 3 out and 5 in

[@panosru]

The video is good, but the background music is VERY loud, I believe that you should lower the db of bg music so that your voice will sound better and clearer.

[@VinylRescue]

Thanks! Great info as I'm about to build a Intel i9 14900k non-gaming system.

[@Syphirioth]

This why I like the NZXT H5 Elite. That bottom cooler that blows outside air onto the GPU works realy nice with rad on front for CPU. And helps the airflow going trough back/top out.

[@Dexx1s]

It would also be good to note that obstacles such as a radiator decreases the amount of air that goes in or out of the case. It's much more than just the number of fans.

[@theTechNotice]

Yes true!

[@cdmikelis]

Oh yes, I forgot to mention when people smoked cigarettes around PC, those machines were nightmare to clean. Tar from cigarettes made stinky asphalt from dust and it was all thick covered, the only solution was do break down PC to components and clean everything with isopropil alcohol. Also golden rule finding a case like this was "do not touch RAM, let alone pull it out" or PC won't boot anymore - unless totally cleaning was planned. Every pin was dirty, covered with layer of gunk and reinstalling ram slightly changed pin position, and it wont get proper contact anymore. At least ram had to be cleaned (the pins), a lot of times also slot ... a nightmare.

[@JoeBourbon-en3qw]

When talking about how quickly air can be exchanged, you can calculate "air changes per hour". Essentially figuring out how long it takes for tge volume of air in the case to be completely exhausted and replaced, and how many times this happens per hour.

[@ceuser3555]

Timely video. Thanks for this one.

[@nicktayloriv310]

I added two more 140mm fans to my Montech King 95 by switching to the front mesh mode and added the fans to the front of that. So I now have 6 intakes and 2 exhaust (rear and rear top). My thermals didn't improve at all (HWiNFO) but my noise level dropped a few decibels as I don't have to spin the 4 front intakes as fast to get the same thermal performance. My PC sits about 6 feet away from me (I have a very large and long desk, the Ikea PC desk hack times two!) and you cant hear it at all. So I guess sometimes More (fans) is less (Noise). 😎

[@mainsource8030]

haha, me to, 8ft ikea desk times 2, but i covered mine with vinyl plank flooring so it looks like grey wood and no seams

[@SimeonKolev]

17:05 on that topic what I did is to make it in reverse :D. I made my case take air from the back and let it out from the front. In this case it is ugly from the outside but the temperatures dropped a lot. Almost 10 degrees with the same components. It was back in the desperate crypto mining days when I had 2 GPUs in the case constantly mining. I had one fan reversed to take cool air directly to the CPU and one under the main GPU pushing again fresh air in. Than I reversed the 3 fans on the front of the case for taking the hot air out and I am still using it that way. It is cooling the hottest parts best because the cool air enters right next to them and than it goes around the RAM, HDDs and other stuff. It is a closed case under the desk on the floor with 2 filters on the intake fans and now when I am not mining anymore all the fans are on low almost all the time. My 5900x is cooled by a Noctua NH-U12A and can't go over 65 degrees with PBO.

[@alex16870]

Self i got : Cooler Master MasterBox 520 Mesh with 3 front fans and 1 exhaust and my 240 aio as top and pull air thu rad and out = Neutral airflow. BUT i have change so the 3 front fans that take air via the mesh has little higher RPM than the rear fan due to its more easy for the rear fan to just exhaust it ,the front fans have harder to take air in.

[@goldfries]

I use a thin ply of issue to identify intake and exhaust areas.

[@theTechNotice]

Good idea, but won't show the little intake areas if negative air pressure.

[@goldfries]

@@theTechNotice correct, it is just the fast way to ensure there is airflow. Not a detailed view.

[@DecnicoPici]

Hi! What case model is at 00:23? Thanks

[@MrSamadolfo]

🙂 on two of my cases i have all the fans pointing inwards because they are argb fans and the case is a fishtank design, only recently some companies are starting to sell argb blades in reverse direction which i imagine with time will be more common

[@Khrenan]

Dust filter or cover on top makes sense for when the PC is turned off

[@Ytinasniiable]

I always determine airflow direction based on the curve of the blade, i generally assume the direction is the side of the blades curved to scoop when the fan is spinning, it's hard to explain with words

[@northern.adventures]

I remember my 1.1 Intel took my side panel off and had a huge house fan on it. lol good old days

[@TheMMadmaXX]

you could use a riser mount for the gpu and push air out through the radiator in the o11. so pull air in via 3x140, push out on the side and back

[@CriticalThinker-42]

Well Said! But you forgot the PSU fan also pulling air out of the case, when the PSU fan input opening (face) is inside the case.

[@theTechNotice]

Depends on the case.... :)

[@nflnrfwz6256]

And sometimes people forget that the majority of the pc is not always on, that means ur top exhaust fans is not blowing air up, and the dust could get into the pc, that's why u put filter on the top too, right?

[@daddybotz]

Good content. Just want to add another factor in airflow and that is turbulence in the pc case. Sometimes, more airlow does not mean it is better.

[@theTechNotice]

Did you see me talk about that in the video? :)

[@Nthlionfury]

I have been looking for a tutorial for something like this so I can build my pc.

[@MyDamnYouTube]

👍 Thanks for the tips Lauri! I really like your videos and builds, they look great. As a matter of fact whats the color you use for your logo and fans? I like it. You got the hex#? Thanks!

[@panic_2001]

Two Elite 140 mm at the front, one Elite 140 mm at the rear + Elite CPU cooler which blows air to the rear. Topic settled ✌

[@theTechNotice]

Pretty much, except people buy these random shaped PC cases :)

[@myamaha62]

I bought the old cases that could hold extra drives just to remove the cages and front pieces for fans.

[@alexyu6928]

You are wrong about positive air pressure being a good thing. When the rate of air coming into the case is higher than the rate the air being vented out, this now warmed air is not exhausted fast enough and it creates turbulence and circulates all over every components. Not a good way to cool the computer. Negative pressure will allow fresh cool air being sucked into the case from all openings, holes, and slots. So this is quite effective but be sure it is only slightly negative i.e., three fans blowing out and two fans blowing in. Neutral pressure is wonderful that a constant air flow across the components. However the lay out of the inward blowing fan and outward blowing fans arrangement/placement is important so as not to create a void where fresh air does not flow across the components require cooling.

[@jimspc07]

I have just started using the Masterbox q500L which is the cheaper version of the one you start the program with. I find it a very interesting case with masses of flexibility, quite small for its capability. It also enabled me to make the build upside down and get the IO on the right, not the left, as I look at the window, some thing I want. I normally use AIO cooling but am using air at present. The PSU hangs off the left side drawing in outside air and exhausting upwards through top 1200 fans. The 1400 bottom fans feed the air in. The case openings on left and right I have sealed off with ABS sheet. This leaves the GPU fans actually fighting the air flow but they are rarely on, as I don't play games and has not been detramental. I have 4 gen 3 and 4 nvme drives fitted and the the standard AMD cpu fan (at present). All temperature are well in control and the fan speeds are quite low and quiet. My 2tb WD black was running quite hot, as they all do, but a thermalright HR-10 2280 pro heat sink fixed that, the other 3 are fine on their own. I try with all my PC builds and case changes to create a bottom to top flow. The top exhaust usually being the AIO 1200 fans and the input being 1400 bottom fans to put more air in than out. Another thing I do to force this flow is blank off all openings in the front and rear. Despite your dire comments on air running round in circles and getting lost my method forces the air to go in a single direction It has no alternative. What goes in must get out and only the top is available. I note with the second case you have, that the 3 side fans are largely a waste of money, (looks alright though) the top one in particular is ideally placed to feed the top right exhaust fan thus losing case flow generally, including exhaust. Also when showing the smoke air flow part a lot is seen coming straight from the front inputs and venting out through the adjacent unfanned top without actually doing anything. That part of the top should be blanked off forcing the air through the case.

[@cyber_flame]

Nice video... However, if you can choose some different PC cases and show us practically by installing fans i.e. Negative, Positive and Neutral Air Pressures inside the case as well as if you can advise more suitable Fans Settings for Past and recent (Popular PC Cases) then it will help us to understand more in deep... Like I have Corsair Crystal 570x but getting Dust (3 Intake and 1 Upside & 1 Rear as exhaust)... Front are at full speed. Cooler is Noctua NH-D15 Black Chromax... I really need to understand.

[@lillnemo1]

Positive pressure is when more air gets pushes inside the case Negative air is exhaust fans pull more aire than intake. Neutral doesn't exist really. That's standing still air

[@cyber_flame]

@@lillnemo1 You are right but area is bit dusty now and due to that Dust Intake with Air is more than usual. I have installed 3x120mm front (Intake) and 1x20mm rear and 1x20mm top (both exhaust)... Don't know if this is OK or not as I don't have things to measure it.

[@rahulkamath6984]

I have got the fractal torrent case which I feel is the best air cooling case ever That come after watching you video made long back. Thanks for that

[@theTechNotice]

Yeah, it's one of the best!

[@rahulkamath6984]

@@theTechNotice thanks to you. Due to it I actually got to know about that case and the NH D15 else I was on a diff line altogether. Due to some misguidance off course. Thank you for educating my PC side to the correct direction Much appreciated

[@RendySinoman]

the problem is your cpu liquid cooler is blocking the hot air in going out from the top of your case.

[@andrewgoshal2478]

22 minutes for air flow !

[@ozcanozcan9681]

I m vaping inside to the pc for checking air flow :D

[@ggogaming7441]

7:35 That flex on the desk scared me. Please check it out.

[@vensroofcat6415]

Universal rule - air moves from convex side of blades to concave one. Air gets grabbed like a sand in your palm. Can't grab much with the wrong side of your hand. Positive negative air pressure - overhyped chat warrior topic. Open case, clean 2x a year. Except you have 5 cats. There is no neutral pressure. Like never. Filters, fan performance being rated +/-10%, etc. Plus hot air expands and thus exhaust always has higher volume. Ignore, keep it close enough. And seriously clean your bachelor cave once in a while. Turbulences actually improve cooling. Air not just has turbulences. It naturally also forms layers. Which isn't great for cooling since air is quite good insulator. So you want those layers to mix. The problem with turbulences is "recycled" air. So keep it turbulent, but remove all of it for fresh one. Also conflicting turbulences may add noise a bit. We have flow through GPUs and yet pretty much everyone still uses rear fan for exhaust even with CPU air cooler in between. Thus putting hot GPU exhaust air through CPU cooler once again. But thinking out of the box and reversing rear fan (and CPU) is so hard, right? Best cooling would be tunnels within case. There is some OEM history with those for 20+ years. Optimum Tech did a great video about 3D printed tunnel optimized cooling. Cooling is not about adding air. It's about removing heat from the system. Quickly, directly, least interfering.

[@Ureroll]

Cheapest wait to improve airflow? get rid of the glass, is a thermal insulator. Spending 200 Euro on pretty fans just to have em strugle under glass make no sense. Especially in Summer

[@Plaer1]

Then remove the whole case...yeah that wouldn't help airflow

[@Ureroll]

Rgb lover detected. And that is ok. Anyone can do with their budget whatever they want. How about a lil aquarium in your custom loop ?! 🤪

[@archvile1313]

Ok, who can help? So which case can be good for air cooler cpu? And so you're saying to have a single direction for airflow while J2C tested the H6 and had 3 intakes from the front right side I should say (because that's how the case is, the intakes are at the front but front right sided than a complete right side) then he also had 2 bottom intakes. There was no exhaust at the rear, he instead put 2 or 3 at the top as the exhausts then when he made the test with smoke it was pretty good how the airflow would be directed. So obviously there was 2 circulation ways with that case, what's your opinion about that airflow using his setup fans? The H6 is highly praised too by many.

[@lanoche]

18:50 Thermal Take did that. Their CTE T500 does exactly that.

[@HeavyComponent]

Glad you made this video. My current setup which I want your opinion on or anyone reading this opinion. I have a Lian Li O11D Evo RGB case and the way I have my fans set up is like so... I have 3 fans bringing in air from the side/front, 3 AIO cooler fans that are exhaust on top, 3 exhaust fans on the bottom and 1 exhaust fan in the back. Everything stays nice and cool every since I built this computer this way. Even with gaming I have good cooling with no overheating issues, but what do you think?

[@milordas]

put bottom to intake

[@magnusnilsson9792]

Perspiration chimney don't really matter and as I rule of thumb, calculate 50% flow through a filter or radiator and 67% flow when turning 90 degree angles.

[@kosie3897]

Great video. I'm curious though, I just built a PC with the Lian Li O11D case. I have 6 intake fans (3 on the side and 3 on the bottom) and 4 exhaust (1 at the back and 3 up top which are also my radiator fans). Given I have 6 intake and 4 exhaust would this be classified positive? Also in terms of tuning fans, should I also be tuning the intake fans a little faster so I have more air coming in or given that I have 6 intake and 4 exhaust already should I just leave all fans running the same rpm?

[@Egirlstuff]

BTW The clickbait is showing positive not negative pressure. If diagrams are accurate. More air coming in that out is positive pressure. Suction is negative pressure. So more fans out than in.

[@1q3er5]

nice video!

[@zPepeTrash]

You would be such a great physics teacher mate 😂

[@M8YM8]

Great video thanks Cobber 👌🏻

[@ballchuzai8951]

Love you video, it’s informative . But my pc airflow gets stuck by my cat on the top of the case😊

[@estebanaguilar99]

I want to change my current case for the lian li vision or the NZXT H9 Elite. What would be the best fan configuration for those cases?

[@evoemperor3776]

I bought a pc case solely because of its minimalist design and small form which was an aerocool cs111 it only has 3 fans 2 at top, 1 back it was a bad mistake because my gpu was running too hot because of bad airflow even reaching 90c and because my gpu is hot my cpu aircooler is also getting its heat and ramping the temperature even more. I had the 2 top fans on intake and 1 fan at the back exhaust and when i change all fans to negative pressure it improve my gpu temp at whopping 10 degrees less and my cpu was still hot but i change the stock cooler to a bigger one and it improve cpu temp to only 76c rather than 90c. Negative pressure works well on small cases with less airflow.

[@jianliu9420]

Less is more. You need "Cross Ventilation" similar to the effect when two windows are open at the same time in opposite direction. This pulls in fresh air collumn, and gets draged out. Straight line = Less disturbance of airflow traffic aka. Turbulence. Front intake fans pulling in, and powerful rear fans position in a straightline is much better than all the cool stuff looking crap with fans sticked all over the place! Less is more! More fans creates more turbulence. You need straight in and out, not in dance around and out.

[@Vialli100.]

I have 6 x intake and (4 x out, including the 3 on the AIO) Lian Li Dynamic Evo.. Intake 3 side, 3 bottom. Out 1 back, 3 AIO top.. CPU 5900x Idle 33c, Load 60-63c..

[@ThisOLmaan]

Mister couldnt find the video on this timestamp 19:23 so many videos on ur Ch... would have liked to watch it.

[@DominikV235]

So I bought a bundle that has Arctic III 360 AIO and I bought Be Quiet 802 Silent base with 3 stock 140 mm fans. How should I place it then to cool off R9 7950x3d and cool off MSI 4070 Super Ventus? Add or keep that is the question?

[@Bigpopp1]

I’ve switched to a positive air pressure strictly due to clean dust free pc case. However I’m running my a closed loop.

[@nozgul3865]

Im thinking of getting an aquarium case. I want to know if its possible if i put my AIO radiator at the side and 3 exhaust top. For my intake can i fix 3 below and 2/3 rear?

[@_Jouzo]

whats the background music in this video it sounds nice.

[@stonecold91]

"A typical case" and he shows a case with the psu mounted on the front of the case🤣🤣

[@HmmChunkyLizard]

I have my radiator in the front with three intake fans. I also have my top two fans intake. With only one exhaust fan at the back of the case. Case is the Corsair 4000D. Is this an okay fan setup?

[@DontMansion]

Everybody makes a huge mistake building a case vent system. Even in this video