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everyone's been waiting even very famous celebrities for the results

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of the one-year airflow test

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yes my friends we are still running them

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and we are doing the video but there's only one small problem

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luke doesn't work here anymore to do the stunning conclusion

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so we're gonna have to walk all the way over to Floatplane media's office

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hello and get luke to help me

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check out which one worked or if they all didn't work

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brought to you by tunnelbear tunnelbear believes the internet should

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be more open and private try it out for free at tunnelbear.com LTT we'll have

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that linked below

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i actually had very little involvement in this project what is going on here

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well there's any audi and in betweeny like there was before

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audi has more fans blowing out i think all the

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fans blowing out any has all the fans blowing in and in

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between e is fairly balanced they have all been running for over a

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year behind the old set but then we built this mezzanine

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that we're standing in and then we tore down that set so once the mezzanine was

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done and before the set got torn down they got moved up here to the office but

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they were out in the warehouse under the worst possible conditions literally

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construction zone let's not entirely dismiss the

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possibility that we will learn something today

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even if what we learn is that we're idiots and we don't know how to perform

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a controlled experiment so which one is supposed to be the worst by the

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conventional wisdom i think most people

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think that all in is the worst okay so let's get the other ones no wait wait

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wait no no all out is supposed to be the worst but all in these are these aren't

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so the top and back aren't this is supposed to be the bad one

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okay all out and then it sucks air into the crevices yes yes okay okay so this

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is the one we start with so the outside isn't really something

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to judge because they would have all had a bunch of dust settle on the top

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and it's not that terrible i mean like i'm gonna do one streak on

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the power supply yeah i mean it's not great it's not great um

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having a look at our fan though

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really makes me wonder how it is that people get their computers disgusting

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enough it's like to be like gummed up wow there's a there's cobwebs in here

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that bottom filter was definitely doing something

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and this is audi this is audi so that means this one isn't pulling through a

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filter it should have been sucking all the air in from elsewhere so this is

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another thing we have to be careful with this this is another thing where it's fairly case specific because a lot of

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cases don't have that huge filtered mesh on the bottom so you can also see here

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that with the audi case we've actually got a lot of dust build

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up here and you can assume that for every bit of dust on this mesh

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yeah more got pulled in yeah actually this is

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a good thing well sort of a good thing but it's a good thing to see so our

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graphics card does have a dust bunny inside it yeah

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so that's some build up so our CPU is good yep so on the top was good so it

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actually didn't suck that much in because it was blasting everything out

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which makes sense so the CPU is like sheltered almost because everything

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around it was like no get out yeah so you can actually you can see some dust

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streaks on these cable management holes and then but not much i bet you the

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graphics card was breathing through here and through here power supply is clean

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because it's through a filter actually that area of the filter is pretty concentrated

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any dust that's caught in this filter was already in the computer

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okay interesting so that's all pulled from

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inside and these fans have a fair amount of buildup in them actually i think the

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main takeaway with this one is that even in a construction zone

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where clearly there was a lot of dusty buildup on top

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most of your dust is coming into your case from the bottom

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so if you put your computer on the ground because we didn't have

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fans blowing out at the bottom that's right yeah you might have a bad time

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wanna do the other extreme the test is still bad we're already learning

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something hold on this is the one that is sucking everything in this is

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everything in yeah so theoretically yeah this isn't going to be good either

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well no okay let's start with the bottom okay

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ah interesting that's weird

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the power supply area doesn't have much dust no it doesn't

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because the air is blowing out of here getting

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filtered and then being sucked into here there's two fans like hold on there's

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one two three four five fans

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worth of pressure going out of here this effectively has a skirt around it oh

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yeah okay so there's dust on this but it's not on the inside it's on the top

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yeah it's definitely on the top that's so weird so the power supply

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is completely clean yeah

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how interesting that is interesting see we are learning things i did not see

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this one coming that is okay that's cooler than i expected i will definitely

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give it that i want to see the front okay

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it's filtering stuff this is telling us that this case's intake system is like

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not that great because these are about as dusty as the other one this stuff is

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on the outside because it's pulling through that makes sense

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oh some dust like flew away when you did that like and

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it's loose which is interesting

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our graphics card has no doubt that's a little more gnarly than last time

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definitely more dust just like CPU because there's okay there's also

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definitely more dust on the back fan CPU and the top

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so GPU is a little bit better power supply is better this case does

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not have filters on the top of the back so you don't get too experienced so the

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main takeaway from this one is that more

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airflow right around an area is going to give you a much much higher

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concentration of dust and that again poor planning

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is ultimately what's going to kill you yeah is the graphics card better or

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worse on this one oh it's way worse way worse

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so the GPU over there had to breathe in through this which was very apparent

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yeah and it breathed in junky dusty air that's right this one is actually

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breathing good air but that's the only piece and the power supply

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i wouldn't have thought that having a filtered fan like blowing towards the

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graphics card would affect the movement of the air inside like the currents

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inside enough to be the difference okay so this

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is sort of the um like the recommended

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way so it's neither one extreme nor the other most people would go with a setup

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similar to this so it's important to note that even though we've actually got

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four fans pulling in and two going out the ones coming in are filtered

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so these filtered ones coming in should have much less airflow than the

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non-filtered ones going out yeah so right off the bat our CPU is pretty good

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i would say almost as wow almost as good

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but not quite there is still no not

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quite at all there's definitely still noticeable dust

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and that one was like actually clean so this one what's interesting is that even

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though it's using a poor method of keeping dust out of

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your system what it does do is it focuses all the

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dust that it does pull in on the bottom and then sucked it all through that

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filter for this particular case and here a bit yeah and it's going to change with

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every case okay should we have a look at the filters yeah the bottom first yep okay i'll tilt

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it okay so as expected

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this one doesn't have an air curtain around it so the power supply does draw

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air through the filter filter didn't even stop everything nope filter didn't

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stop everything at all and there's a lot of dust on this yeah this is easily the

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most concentrated wow there's like hairs

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look at this there's like strands of wet okay there's a little bit of that on any

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yeah that makes sense because these are pulling in right

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yep yeah

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ugh and like it plumed

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okay so that's as expected so no dust bunny in the GPU

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GPU fan mostly clear this one had more

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fans and got slightly more total dust which

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kind of makes sense makes sense and the filters are slightly more clogged which

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makes sense but overall i'd say it's probably more balanced

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the CPU got hit but not as hard as it did

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on the really bad CPU case yeah but not as good as it did the other time

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but not as well as much as this one yeah internally so it ended up being in

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between which is kind of what we were aiming for we

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just didn't know it was actually going to work that way

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here you go then the main takeaways are

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on your intake fans you want to have filtered air to the

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greatest degree possible and the more airflow you have

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the more dusty buildup you are ultimately going to have yeah i think a

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balanced approach is good but you're gonna have to think about your

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particular case your particular setup like if you're on the floor then one of

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the big things we learned is you want a bunch of exhaust on the floor yeah to

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keep dust away from your system it actually works yeah yeah

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and then the other big takeaway is that freshbooks is the small business

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accounting solution for well small business owners and freelancers so

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whether you're running a plumbing business or you're running a house

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painting business or dust management doing cleaning people's computers for

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them for a few bucks on the side which by the way can be very lucrative

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freshbooks helps you stay more organized get paid faster and track your expenses

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log your hours and even do all of that stuff on the go with their fully

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featured Android and iOS apps try

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fishbooks for free at freshbooks.com

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LTT we're going to have that linked below just enter Linus tech tips in the

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how did you hear about us section so that was actually more enlightening

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than i thought i'm surprised i thought they were just all gonna be butchered

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because of the construction zone so guys if you dislike this video then like come

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on we finally did it you were all asking for it but if you liked it hit like get

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subscribed maybe consider checking out where to buy the stuff we featured no no

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no no whatever we've got our merch store linked in the video description and our

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community forum which you should totally join for those of you going hey luke's

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back where did luke go he's working on Floatplane yeah uh go check out

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floydplane when is this video coming out i don't know

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there might be the alpha up yeah maybe or not

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see ya bye