WEBVTT

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the world was absolutely Blown Away pun intended when fro systems came out of

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stealth after 4 years of building a

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solid state cooling system that sucks

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sucks a lot of air look at this thing

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and here we are 6 months later with everything basically fully uncovered

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they've got multiple solid state cooled PCS torn down airjet minis for us to

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peek inside and they're even teasing a more powerful version with double the

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cooling capacity and here's double the segue to our sponsor segue to our

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production tools check them out at the link below and use code Linus for a very

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nice 69% off your first purchase or subscription at risk of sounding

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offensive it doesn't really look like much they've got a flat copper bottom

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that sits on your CPU or S so any heat generating component on the top you've

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got these kind of paper filters over the intake flexible PCB that goes into their

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drive system and then at the back there's a tapered section that leads to

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a skinny little exhaust and it's there

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that the unimpressed completely disappear I mean this thing hauls butt

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they are blowing air at over 200 km an

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hour through those filters and Blasting it onto the copper plate but here's the

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thing moving air is just a means to an

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end it's only part of the battle we don't really want to move air what we

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want to do is remove heat let's take it

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apart to see if we can get a better understanding of just what's going on

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here I cannot believe they're letting us do this here's the completed cooling

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module which I've shown you already and here it is completely torn down into its

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constituent components it starts with

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yeah this really is just a sticker four little paper filter Windows in it okay

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and then we get into what I would call the cooling engine it uses pzo electrics

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and we did a full video about this recently but basically a pazo el

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electric material vibrates when you apply an alternating current to it so

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what you're looking at in the top is these intake slits that pull air through

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those filters okay then out the bottom

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they've got all these little jets that blow down onto two here's the last

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component this kind of crappy flat

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copper spreader I mean okay I get it you

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want to keep this thing thin it's just 2.8 mm and that's critical for getting

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the design in thin and light devices like like laptops but every cooling

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plate that I've ever seen that doesn't totally suck has got fins or other

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structures to help increase the surface area what is going on here to find out

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we need to go back to the cooling engine or the cooling chip as they call it on

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the underside there are 80 small openings called impingement Jets they

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were only willing to let us open up an older prototype that has twice as many

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but you should still be able to get the idea here and these jets are a huge part

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of the Special Sauce that makes this cooling solution so unique we've shown

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many times in the past that there are diminishing returns as you blow air

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faster and faster over a heat sink this is because of something called called

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The Boundary layer check out this illustration from Wikipedia see no

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matter how fast your air is moving sort

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of near a heat SN fin the speed of it is

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always going to approach zero as it reaches the actual Fin and this is due

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to friction what happens then is this

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creates a blanket of insulating air that

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prevents heat from being removed from the fin efficiently well what FR has

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done is they've used these bets of super

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high velocity high pressure air to completely obliterate the boundary layer

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this increases effective heat dissipation by about five times for the

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same air flow and functionally saturates the air with heat bringing it up to

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nearly the same temperature as the copper heat spreader now an airjet mini

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is good for about 5 watts of cooling at room temperature assuming the dye is at

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about 85 degrees so naturally I ask them

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well could you just take a bunch of these throw them on a vapor chamber

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and and of course they've already done

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that this Samsung thin and light right here has been modified with three airjet

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minis for a total of 15 watts of active

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cooling on top of the passive dissipation through the chassis now they

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could have put a fourth one on here but this machine wasn't designed in

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collaboration with FR so they had to improvise a little bit and as you can

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see there's some PCB there that wouldn't very much like to be chopped off this is

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such a good demo here because they've got their four modified laptop here

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running right next to an unmodified one showing some key benefits so first up

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check this out using our thermal camera we can actually see that if we look at

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the exhaust temperature behind the system our fro is at about

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41° while the regular cooler is at about

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35 five this can be partially explained

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by the heat saturation of the air like I talked about before but part of it is

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also that our FL laptop is running about

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10° hotter wait but that's a good thing let

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me explain in many laptops the

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performance limitation is actually not the temperature of the CPU or the S so

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rather it's because of the external temperature of the device anything above

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about 45° c will eventually burn the

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user so thin and light laptops will already throttle performance if the hot

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spot on the bottom exceeds this level

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that is where the air Jet's second big party trick comes in aside from not

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needing a fan it is extremely high

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static pressure Roar systems claims that an airjet mini manages about 10 times

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the static pressure of a MacBook Pro cooler over 1,700 pascals that allows it

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to suck air through restrictive openings

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much more effectively than a conventional fan which improves cooling

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not just of the CPU that it's installed on top of but of the entire system so

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because the skin temperatures of our two laptops are so different the floor

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system CPU is actually operating at 33%

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higher power that is going to have a dramatic impact on

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performance that's why the chip is running hotter another advantage of the

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high static pressure is dust resistance typically a laptop can't be both

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actively cooled and dust proof unless you create a separate compartment for

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the fan and heat sink kind of like what they do in some rugged machines that is

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not a great solution for a thin and light but with the air jet there's the

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dust filter that's on the air jet module itself and you can also use that

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pressure that that suction ability to install dust filters on the intake of

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the device without trashing your air flow so you could have it pull air

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through a filter here put air through another filter here and blow it out the

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back cooling the entire device and the best part they built in a reverse like

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blast out cleaning solution for the filters so they should Last 5 Years and

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Beyond without getting gummed up even though they're just basic paper dust

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filters this dust resistance is what made the airjet perfect for their first

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commercial product the Zotac ZBOX Pico with airjet this Mini PC is intended to

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be used on Factory floors where dust and debris could easily clog up a normal fan

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cooled device now in the past Zotac got

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around this by just passively cooling the CPUs in these devices but that

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limited them to a 5 watt Celeron Processor with this dual airjet mini

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solution though they can now use a 15 W core I3 which takes them from two cores

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to eight that is a massive performance uplift and we can see the difference

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right behind me where they've got one of these systems running passively this is

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with the core I3 showing how it's thermal throttling to hell and then

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they've got the for systems cooled model where you can see the performance is a

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lot better and this is still early stages they're expecting to be able to

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get CPU power up a fair bit by improving the efficiency of the rest of the device

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that is all really impressive and changes my question from why did you

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guys need to be in stealth for 4 years to how did you do this at all as we saw

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in our pazo electric fan video ensuring that you hit the resonant frequency can

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have a huge impact on performance and

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the thermal expansion of the vibrating membranes is enough to knock it out of

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whack meaning that they have to constantly change the input frequency

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between 23,000 to 24,000 Herz to ensure

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that it's always operating at Peak efficiency that brings the full power consumption

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of each chip to just one watt at Full

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Tilt that's not bad for 5 watts of cooling each for context that would

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allow you to handle a 15 watt system with two air Jets and would cost you

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only about 2 watts of power for heat dissipation that's almost identical to a

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small fan like the one on the steam deck which is 2 and 1/2 watts and takes up

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more space but hold on a second here lonus when you guys showed off that

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expensive pazo electric fan a while back it had low power consumption sure and it

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was dust proof but it had none of these other benefits where was the high

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pressure okay I'm getting there you've heard me a couple of times refer to the

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air jet as a chip well I asked them what

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makes it a chip like does it have some onboard processing or something the

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answer is no but that doesn't make them

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big Liars achieving the kind of oneway

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value valve operation that gives this cooler such high static pressure it

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takes a lot more than just a vibrating tongue depressor like we saw last time

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so like a chip the airjet is precisely

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manufactured using photo lithography the same process as you would use to build a

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CPU or a GPU you coat the cooling engine

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layer by layer with photo resist then

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expose it to light and etching chemicals and remove the unneeded material this is

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inherently a two-dimensional process so the air jet gets built up one layer at a

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time until we have our final little air Blaster now the manufacturing process is

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a big part of the reason that the air jet is only going to be found in premium

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devices at least for the time being where you can justify that additional

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cost with the additional performance that it can unlock cuz see the thing is

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while photo lithography is a well understood and fairly mature

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manufacturer ing process especially at a relatively macro scale like this F is

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working with entirely new non-silicon

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materials that required extensive R&D and brand new Machinery to manufacture

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at any sort of scale and high cost isn't

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the only bad news while their demo here does a really good job of showing how

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the for system outputs less overall

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sound than the conventional fan I found that the quality of the noise that is

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that it's at a bit of a higher pitch made it significantly more noticeable

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the good news is that there are clear paths to resolving at least some of

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these problems in the future while the airjet mini outputs laminer airf flow in

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order to make it quieter this laptop wasn't designed with the airjet mini in

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mind and it's blasting that air at the bottom of this hinge and the bottom of

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the screen increasing turbulence and increasing noise they can actually

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adjust the nozzle in a device that's built for their cooler to help alleviate

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this issue and there's more the road map

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these guys are showing looks extremely promising when they went out of Stealth

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at CES they showed what the airjet mini

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but there's more even at their current manufacturing node so to speak they can

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already build higher performance solutions the airjet pro is twice the

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size and manages to remove twice the heat about 10 watts at only 1.7 times

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the power consumption so divice like laptops could easily have a bank of like

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four of these sitting along the back cooling up to a 45 watt chip as long as

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you've got a vapor chamber to spread the Heat and oh the best part man you

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wouldn't even like need a bottom intake anymore so you can put your laptop down

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on your bed and it's not going to overheat cuz you could just draw air in

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from anywhere that is so cool and it can

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be used on just about anything aside from computers they're showing off LED

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lights fixtures at like oneth the overall volume they've got uh oh check

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this out actively cooled ssds that are

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operating it ow okay that one's really hot the the not for a cooled one uh

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smart like iot devices like want to

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overclock your ring doorbell with an airjet mini they figure you could do

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about eight watts compared to the 3.3

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Watts that is allowed with the passive stock configuration I mean what's next

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I'd love to see this thing modded into an Rog Ally or a steam deck two Min

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should do the trick right Alex oh yeah is that a project you guys want to see

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oh what about in a phone I mean there's gaming phones with fans and water

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cooling in them already why not this black shark RG phone team you guys up

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and what's really wild is this is all just with the current gen their Material

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Science folks do see a path to doubling their performance per unit area every

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couple of years for the next little while we could see thin and light gaming

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PCs with 70 class NVIDIA Graphics in

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just a few short years and I'm not talking the cooling limited ones that we

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see today I'm talking full performance the main levers that they're

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going to be using to do this are higher amplitude vibrations and higher

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frequency vibrations which makes sense

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and so that combined with if they can bring costs down I mean they wouldn't go

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as far to say it see they're not going to say it right now but when I asked are

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you guys trying to make fans just obsolete I caught one of their technical

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guys nodding in the background huh yeah

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it's not impossible that they could even get the cost competitive you see the

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thing is a motor Hub is always going to have a fixed cost because of like

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magnets and stuff but if they're able to scale in a Mo's law kind of way well let

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me put it this way the hard drive industry thought it would always be safe

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from low capacity ssds and they cost so

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much and where are they at now for says

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that their process is similar to TV panel manufacturing where the larger

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they can get the motherg glass the bigger the panels they can build at

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lower costs well that sounds pretty good

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given TVs have been one of the only thing that's been inflation proof lately

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so right now yeah the costs are high but

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that's because they're operating at a very small manufacturing scale because

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it's so new but that could all change if

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you guys enjoyed this video go check out our video on the pzo electric fan that

00:16:04.920 --> 00:16:13.279
cost us $1,100 how far we've come in like six months was that six months ago

00:16:09.880 --> 00:16:13.279
a year wow