Static Pressure vs. High Airflow Fans As Fast As Possible
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- čas přidán 25. 08. 2024
- There's more to choosing the right PC fan than picking a size, noise level, and bearing type! Linus explains the difference between high airflow and static pressure fans.
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my wife said "are you listening to that goofy dude again?" yes i am
Listening to Linus is one of my guilty pleasures. I put on WAN shows that I missed and fall asleep.
You should have said "I'm always listening to you, dear. Oh, you meant linus?"
haha, my wife hates his voice lol
Hahahahahahha gold
haha "goofy"
of course a video about fans comes out the day after I buy a set
Same except I bought mine a few weeks ago :(
+william Booth-Clibborn Did you buy the wrong fans?
Same except I bought mine 5 years ago ;(
+william Booth-Clibborn Heh I just bought some a month ago myself. I had always gone with included fans in the past. Aka, the fans that came with my case and the fans that came with my aio watercooling cpu cooler. I decided I wanted to replace some fans to improve the look of my rig, so I researched this just a few weeks ago.
For fellow noobs like myself, the exhaust side of the fan is the side that the motor is attached to usually, if the fan doesn't have an arrow to know for sure. Therefore, if you are attaching an intake fan, put the side the motor is attached to closer to the center of your case than the rest of the fan, if you are attaching an exhaust fan, put the side the motor is attached to closer to the outside of the case than the rest of your fan.
Also consider what is known as a "positive pressure" setup for your case. That means you have more air coming INTO your case, than getting blown OUT of your case. The reasoning behind this one is dust. You will know where all your dust comes from, specifically your intake fans. Therefore, you could put filters with your intake fans and eliminate a large percentage of the dust in your system. There are always other places dust can creep its way into your case. If you have positive pressure (more intake than exhaust), then those cracks and holes will be expelling air, instead of sucking in air, making it much harder for dust to enter those tiny holes.
I personally have 2 140mm front intake fans, 1 120mm bottom intake fan, 1 140mm rear exhaust fan, and 2 120mm exhaust fans attached to my cpu radiator in pull configuration. As I said earlier, I am not an expert because this is the first time I attached custom fans, but I'm hoping this info is helpful to people that were in the same situation I was in.
Trust this to come out 4yrs before i purchase mine
This seems like a very good topic for a "Workshop" type video - to see how much of a difference the types of fans would make in a congested vs airy case
Speaking of Houses made of Ice, lets talk about payment systems.
Lol
Yep
+Subash Chandra "This video was Sponsored by Cool Master!" :D
+Subash Chandra yeh for once that transition got me. lol
Speaking of iglos: Brainfreeze!
When TechQuickie has better content than LTT
+Matthew Kinney Because some of the videos should be TechQuickies...
Like how to install a FREAKING GPU
+Vinyl Scratch or ....
How installing GPU in FREAKING way.
lol ...
So its basically horsepower vs torque.
yeah actually that's a good way to think about it
As a car guy, nobody knows what that means! Lol no jk. It’s just a pain to explain
@@raymondjackI would love to say they are the same thing many would raise a spear against me but really, we are just missing the RPM part
Digging this video up because even 6 years later I needed an explanation for static pressure vs high airflows and I knew Linus would have that covered
Come on Luke I want to see a does it matter video about static pressure vs airflow fans lol
Preproto wait are you joking or...
I think that testing static pressure fans vs high airflow fans in a cpu heatsink and/ or a pc case would be a great video for your workshop series
Some of the transitions that the LMG team have to do between a topic and their sponsor are comedy gold. This is definitely one of the better ones!
i turbo charged my computer cooling, im getting about 20 psi of boost, with that i get both high airflow and high pressure
Stututuuu
2:25 AM in Italy here, tomorrow I'll have an important math exam, hope this video will help me
It won't!!
+DragoonDark97
9am here, haven't slept yet, hope this video will help.
+DragoonDark97 Please follow up with how the exam went when you're done
Best of luck to you.
+TheLofren lol. we all must know the outcome. the Internet is watching now
Drink every time Linus touches that thing in his pocket.
+Nicholas1984Autonomy I'm tanked
gigidy :)
Linus, can you do a video of building a CPU INSIDE an igloo??
+ZRovas117 Igloo-shaped CPU case. Made of genuine ice.
+ZRovas117 I don't think he has the equipment to manufacture a CPU. Much less inside an igloo.
+Crazy Canadian I think he means a pc
VoidCrafted Gaming He prolly should've said that, then.
+Crazy Canadian maybe ASML is kind enough to donate a multi million Euro machine for that....
That transition to the sponsored part in the ending was so damn smooth.
All I could focus on is whatever Linus kept touching in his pocket.
Ket
I find it quite irritating too!
+Liam Irwin I think it's the remote for the teleprompter...
+Liam Irwin prompter scroller
+Liam Irwin I think that is the audio equipment for his microphone.
Do a high flow vs static pressure test on a radiator and heat sink to measure the actual temperature difference. Could work as a workbench episode.
how can u tell if
a fan is Static Pressure or High Airflow Fan
you can actually tell by the number of fins on the fan and the angle they have more fins usually means its for airflow. overlapping fins have good pressure
@@Aleph-Noll OK thanks for the info
Fans like any other component in your system need to have SPECS (specifications). The information comes in what is called a "datasheet". If you are shopping on Amazon you will not get such information. If you are really serious you need to be shopping on a real electronics components site like Digikey. You must realize also that the specs given will be for a specific condition. So "200 CFM" is worthless all by itself. It needs to be something like "200 CFM at blah blah blah static pressure environment". Sorry, there is no simple answer here- that's why we engineers get paid so much money ; )
I would really love for Linus Tech Tips to do an experiment here. Could you do an experiment where you test AF vs SP fans as case fans and as radiator fans, measuring differences in case temps (for case test) and CPU temp (for radiator test)?
and if nothing else, this video is a good reminder to grab that duster and clean out your case fans and prepare for summer heat.
High Pressure type for Intake and CPU Cooler,
High Airflow type for Exhaust,
Balance Fan type for Both.
If you choose RGB Fan, those fans usually adjust to Balance type,
but more into RGB than Cooling Performance.
Witch one you think would cause less tinnitus
And which one for the top of the case?
@@SRC267 Intake, the back usually for exhaust
@@R3in_Ch I was gonna get one for top, but someone said 80mm fans are loud (case only has 80mm support for the top) plus, I don't think it will make a huge difference.
A thing i've noticed with pressure vs. flow discussions is that people think pressure is king on radiators and heatsinks.
But what they fail to get is that it is a complete balancing act.
Higher pressure just means that the air flow will take less of a hit if there happens to be restriction. <
But since HP fans have less air flow in the first place, depending on the amount of restriction, a lower pressure but higher flow fan might be better.
And since manufacturers present their best numbers, it is better to rely on reviews like thermalbench, those guys test the fans with restriction and give surprising results. For example, Noiseblockers eLoop has a very low static pressure (not more than some airflow fans) but absolutely kills every pressure fan on a slim radiator. Now on 60 or 80mm rads this might change, but it has to be tested at first.
They also have great charts showing airflow at specific static pressures (basically, when you increase restriction you also increase the static pressure behind the fan and airflow will be 0 at the fans maximum static pressure and 100% in non-restrictive air flow).
Hey, Linus and Luke, we always hear about using SP and AF fans for different purposes, but we also always heard about cable management and thermal paste application methods being important as well. How about a new Workshop episode on this topic to test it out by swapping fans out in different locations on the case. Like intake, exhaust, heatsink and maybe a radiator. So we see just how much of an impact it makes.
+Aarekk i like this concept. do it guys
Is this supposed to be a joke?
***** No. That's the entire point of The Workshop. They put a plushie in a case and it didn't do shit when we always heard that cable management is important to get the best cooling. They just plopped thermal paste in different ways when we were always told that the application method was important to, again, get the best cooling. Here we have another example of "do this to get the best cooling" and I would like to see a video quantifying that in order to see just how much of a difference it makes. What if the difference is one degree again. Maybe the _less optimal_ fan is far cheaper compared to the _more optimal_ one but the lack of temperature difference makes that a fair tradeoff for someone.
We got two Workshop videos in a row where we learned that nothing happens. I feel I am justified in wanting to know if this falls under the same category.
Aarekk OK, I get it now. You meant they should make a video about the effects of changing static pressure fans for airflow oriented ones and vice versa and the rest was examples of episodes they've already made. The way you phrased it was a bit ambiguous and I (and 5 other people, apparently) interpreted it as you suggesting they make episodes about cable management and thermal compound application techniques.
***** Oh, no yeah. I was trying to justify my pitch by making the claim that it would fit right in with the other videos they made. It may have been a bit weird to open my comment with the past examples. My bad.
Awesome! So glad you just posted this video! I'm going to microcenter tomorrow to get a couple fans and a network adapter. Now I know what I need!
Oh god, this has made the subject so much more understandable! Thanks Linus
Been wondering what the diff was between these two types of fans. Thanks LMG for yet another great video!
Thanks for that good explanation! I had no idea of this, so I'm with even more doubts about this topic everyday 😂. You only forgot to say how can we differentiate a kind to other, since most of sellers don't include such information.
Two thumbs way up Linus good job! It's all about blade design, number of blades and angles. The motor is more about noise level , longevity, rpm's and torque but is mostly negligible as the cheapest fan and the best fan operate so similar. A better electric motor with a better bearing will be more powerful, quieter and last longer. More blades will push more air but rotate slower and require more energy. Larger fans move more air have lower rpm's and are quieter as well.
I would assume a high static pressure fans would create more resonance in a case if the intake and outtake were not matched too well, I noticed that my case sort of had a vibration sound (like 10-20hz) when I did 2:1 ratio of fans, only when the cover was on. It feels like it might be best to have a high flow outlet fans near the CPU cooler and a high static near the hard drive cage, and let the outlet "adjust" to the inlet / CPU/GPU fan movement, instead of having them constantly fighting each other and create a pressure delta inside the case, plus having an opening without a fan that has positive outflow seemed to have best results for me in terms of noise.
Just go for SP fans. Most modern cases have dust filters or solid panels that restrict air flow. The only place I put an airflow fan is the rear exhaust position and I would put a SP fan there if I had another. The difference in open air performance is negligible. However, the difference in restrictive applications is very noticeably poor for HA fans.
laxmannate07 thx for sharing
Good stuff Linus! Thanks for the much needed info.
Linus did a High Airflow fan arrange your haircut. LOL :)
In fan data-sheets, the "static pressure" figure has been measured at no airflow = 100% air resistance and the "airflow" figure has been measured at 0 static pressure = 0% air resistance. If you plot those figures on a graph, you get only two points on the axes - not the shape of the curve that connects those points.
What you want to know is one point on the curve: the amount of airflow for the air resistance of the thing you want to get air through: a heatsink, radiator or just the perforations of your PC case (which could have everything from 30% to 75% resistance).
And don't think that fans have fan curves that look like straight lines.
This is very useful information for 3D printing fans for part cooling fan vs hot-end fan... Thank you for this.
If I had fans in push-pull configuration, would this be just as good as static pressure fans? (other than the obvious more fans and more space used)
when I upgraded my video card from a single to a dual i started getting over heat issues ,.. my solution ,..
I took off the side panel all together and set a 6 inch desk fan blowing directly into the open side ,my pc never ran cooler and surprisingly the sound did not increase in any noticeable way.
the only down side is once a month i need to use a compressed air can to blow a small amount of dust out of the corners of my case.
Have Luke do a Workshop video on this. It'd be interesting to see the real world results
this is like the whole big turbo low boost vs smaller turbo higher boost argument in the car community and if this is anything similar(which it is since we are talking about moving air) generally speaking a fan that moves more air will perform better than a smaller fan that moves less air at a higher pressure. now will it make a difference, probably not in either case but IMO the fan that moves more air will cool better as it's physically moving more air.
I've got a densely packed itx case. So I'm picking a Noctua NF-P12 as the primary air mover. Probably mount the secondary fan as an extractor on the side or top panel.
pls keep posting consistently, I love this channel, I learn so much.
Is it possible to tell the difference between the types of fan just by looking at them? For example by looking at the type/shape of blade?
+Riotlight sure. Airflow fans usually have a lot of blades 10-11-12 but narrow. Pressure fans have 5-6-7 blades but wide.
*****
Thanks for that.
+Riotlight Airflow fans also usually have kind of flat blades that are easy to look through. The static pressure fans usually have more curve to the blades.
@@TorresinhoLFC what if mine are medium width and 9 blades?
Static pressures completely critical in HVAC. How about a manometer for computer cases?
I just had to calculate duct work for all of our weld booths at work. It was a lot more involved than I thought.
+A D Or just have an HVAC system for the PC.
Hell I got a window unit about 4 feet away from my desk, run some coolant tubes from my CPU block through the condensemanator and I'm golden.
both fans have airflow when operational. the difference between the two is the capacity of air IN/OUT, to which you need to measure with anemometer to get the CFM/CMH volume of air output/ input. both fans have static pressure when operational. the difference between the two is the blade design. low static pressure fans are good for open area, free blow. for a specific higher static pressure only needs if the inlet/ outlet has air resistance. examples are vacuums. for a better PC ventilation, you need the right air circulation inside the box. fresh air/ air in should be less 10% to 15% of the exhaust/ air out. hot air always goes up so you need to consider the fan positioning too.
That was a godlike ad segway
Lol ikr
linus does ol ways good work on these videos.props to editors too :D
Great video. I will need this for when I build a computer later this year
Are dust filters really restrictive enough to warrant SP fans?
Scott A If your 'airflow' fans also have a decent static pressure rating then you should be fine. The most you will gain from switching to SP fans is a couple of degrees anyway. I would be more concerned about noise to be honest.
I knew a bit more about this than originally expected, but even still, thank you, I learned some new things, always useful, also, on a side note, I originally found you guys when you were ONLY ltt, and then found out quite late to the game, your other channels, I just wanted to stop and take a moment and say, although I do not always agree with how you guys do certain things, thank you for making all the videos you do, because regardless of my ability to agree or not, with some of the things you guys do, you always make these videos useful for learning new things, so thank you for all that you guys do!
Now do a workshop comparing static fans vs high airflow fans inside a big case with many openings and inside a "blocked vents" case.
Love your videos i always find them helpful, keep it up!
Verry well explained, thanks
thank you so much linus i learned so much from you . from philippines :)
Nice video. Was always wondering about why exactly these were better for certain things. I was just told that they were better for radiators, so I bought some for my Rads lol.
Loved this video a lot, I liked the randomness but keeping to the topic a lot.
I always use high static pressure fans because of the dust and dust filter I put on my chasis
wow great timing on this one
I am 100% expecting an Igloo build now
FINALLY, YAY!
Right now looking at the specs for Corsair AF120 Quiet Edition vs SP120 Quiet Edition at 12V:
Airflow: AF120 provides 5% more airflow than SP120.
Static pressure: SP120 provides 160% stronger static pressure than AF120.
Looking at the "Preformance Edition" of the fans at 12V:
Airflow: Less than 1.3% more airflow for AF120.
Static pressure: 180% stronger static pressure for SP120.
So why the fuck would anyone go for AF120?
MoreCowbellPlzKthx I need a second front fan for my rig and was actually debating on which one of these exact models to get (my case already came with an SP120 fan). Now I know which one to get. Thanks!
That face of just giving up and transitioning directly into the ad.
Linus can you make test, is the cooling of ps go better if we put case upside down but with old case where psu is on the top of case with 120mm fan and with high voltage gpu?
This couldn't be of any better time for me. I'm about to buy some more case and CPU cooler fans.
Was literally looking for a video about this a few days ago. Illuminati.
This is the info I need! Thank You!
Linus really has upped his game when it comes to presenting.......
0:14 "I'm talking about *air* style" FTFY
so i was checking fans on amazon for my first pc build and i saw that there are different types of fans so i checked out this video so i finally understand what are airflow and pressure fans but i still have one question what are air balance fans
just use the Wind-Tunnel Technique -.-' it seems to work fairly well to cool my rig off i basically created a short tunnel out of cardboard to house two fans running in the same direction to increase their effective airflow
Is the choice between high airflow and high static pressure an either-or choice or can one fan have both characteristics?
I am happy to have this confirmed.
i WAS SERCHING FOR THIS KIND OF VIDEO 1 - 2 WEEKS AGO !!
This is a great debate. Pressure vs cfm. On turbocharged cars there's lots of miss understanding about that.
I don't know if anyone has tried it but is there really a significant difference from using AF fans for the heat sinks and SP for the case, than the appropriate situations for them, or just compare the two types of fans (AF and SP) on the heatsink alone. If anyone hasn't done it, it could be another Workshop episode where the conclusion is always the thing we've known but hadn't got the chance to really test it.
So, you want some serious flow, let me tell about the CFM-56 or the GE90
Badum ts
smlbstcbr lmao
Should we tell past linus that future linus will have an award winning beard?
Real smooth transition there linus, gg
Great advices, thanks Linus!
This video needs further exploration in, Luke's workshop series. Just how much difference is there between an SP and AF fan doing the same job? I doubt an end user has personally tested each fan at home and just believes what he's sold, and this is how we end up with, Monster cables or Wireworld's $1000 HDMI cables, even though there is no huge price difference between SP and AF. Get on it, Linus/Luke. For science!
So how are you supposed to compare static pressure for the various CPU fans when most don't even provide that info. on their specs. page?
"speaking of igloo... braintree!"
i laughed harder than i should xD
I think videos like this could be re remade given now the LTT lab(tm) is a thing so a bit numbers can have a play into these :)
I learn ALOT out of teckquickie
I love your videos!! they are really well made and very informative but when you keep your voice at the same pitch for so long it's so hard to listen to XD
Make a video about the difference in temps about the two :)
Please
Do a CRAP fans VS Good Fans. The results would probably be negligible at best.
+Troy Graham For temperatures you may be right but I buy good fans mainly because of less noise and rattling noises...
+Troy Graham In performance maybe, lifespan, aesthetics and noise, are also quite important
I wonder how many other people will feel the need to point out the obvious. The adage of "You get what you pay for." must have been forgotten.
Or the free thinker guy who feels the need to show how much he wonder about things. Those are not obvious statements for the people bulding their first pcs or just didnt care for fans besides the ones already came with their case...
I just wanted to acknowledge your reply.
can we have a video testing the difference between the 2 fans in various configurations on the workshop or something?
i am a mechanical engineering student, i have a fluid mechanics lab project. soon, his words are gold.
how babies are made as fast as possible?
Rithik Kumar Im dieing
It's a race. As long as I come first, it doesn't matter. lol
u really need a fan for ur brain the air doesn't get into the brain to oxygenate i wonder does the air runs away from stupidity or wt lol
Don't you think 9 months is kinda slow?
Can you get the prompter to scroll automatically? Pressing those buttons is becoming more and more noticeable.
So top of case exhaust fans. Better to use Air Flow fans instead of Static Pressure?
Im trying to understand whether or not the airflow series of Corsair (AF140) would be a better bottom intake fan than an ML140, but the ml140 claims 97 CFM while the af140 claims 66. But the ML140 has significantly more static pressure?
power = force*velocity, by definition static pressure fans are not more powerful than high airflow fans. Static fans are more parallel to the heat sink than high airflow fans in order to prevent back flow of air when the air trying to get through the heatsink tries to bounce back out, not penetrating the heatsink.
so if i have 2 fans, one is high static pressure and one is(low static pressure)advertised as an airflow fan, but BOTH have the same CFM, wouldn't i just go for the high static pressure fan?
Building computers on the side of an igloo... the new Canadian Standard!
Challenge accepted.
There should be a Workshop vid on it. "Does building you PC in a igloo keep it cool?" Didn't work in a fridge.
Accepted*
+Justin Passfield thank god someone corrected that, it killed me
+Justin Passfield Thank you. I sometimes hate myself for my mistakes.
+LordDecapo Me too :)
So, let say I have 2 fans. The one has an airflow of 44 and air pressure of 0,7. The other one has an airflow of 51,2 and air pressure of 2,44. The first fan was mounted on a cpu cooler (let's say something similar with the 212 Evo), now that first fan is replaced by the second one. My logic tells me that since the airflow is more and the air pressure is more, better results should be seen.
The problem: Temps went from 30°C to 50°C when those fans operate at 100%.
What am I missing? Does it have anything to do with some kind of airflow to air pressure ratio?
I'm planning on buying the H100i RGB Platinum. But I want to buy RGB fans to pair with the fans on this AIO (as in connecting RGB effects in iCue like you see in all those nice builds).
I need one airflow optimized fan for the front (as I am going to mount the AIO radiator and the (included) ML120 RGB fans to the front) and two airflow optimized fans for the back of my case (one in the rear and one on top).
As I only have space for one 120mm fan on the top of my case, I want one fan there and I cannot mount my AIO radiator there. That's why I'm going to mount the radiator in the front.
As the ML120 PRO RGB fans are static pressure fans (so optimized for radiators and tight spaces, only applicable for me for the AIO radiator itself) I need in total 3 airflow optimized RGB corsair fans that will match the ML120's on the H100i RGB Platinum.
Because I need airflow optimized fans, I do not want to buy more ML120's as they're static pressure fans.
Any suggestions on airflow optimized RGB fans that'll match the ML120's on my H100i RGB Platinum?
I know Corsair has their AF line-up of airflow fans, but they're not RGB.
I do not know what the LL series do. Are they airflow fans? Or static pressure?
Does it matter if I would mount the static pressure ML120 fans as exhaust fans? Or doesn't it matter THAT much because the ML120's have better performance than the LL120's?
Should I go for the LL120 RGB fans? Or something else?
Also, if I would f.a. buy the H100i RGB Platinum and 3 LL (or ML) fans with a lighting hub/lighting node pro. Do I have to plug the ML fans of the H100i into that hub along with the other 3 fans?
Or do they connect separately into the H100i and can I choose whatever fans I want as they have their own hub? (I've read on some compatibility issue between different fan types and their hubs).
I could not find anything about the airflow/static pressure subject on these two fans. I already know that the LL fans have worse performance but look better but then again, the ML fans are for radiators and are the LL fans meant for cases and are they good enough?
All in all, a whole story. If you read this far, I appreciate it and if you would help me decide, you'd help me even more! Thank you in advance!
How about a full system of Delta PFC1212DE??
I needed this video
discuss usb-powered monitors! i saw something currently on sale for $70!
which fans are better Axial (desktops) or Centrifugal (laptop) if they were the same size and same RPM which would cool more?
this channel has evolved so damn much...