Original subtitles

the world was absolutely Blown Away pun

intended when four systems came out of

stealth after four years of building a

solid-state cooling system that sucks

a lot of air look at this thing

and here we are six months later with

everything basically fully uncovered

they've got multiple solid-state cooled

PCS torn down air jet minis for us to

peek inside and they're even teasing a

more powerful version with double the

cooling capacity and here's double the

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very nice 69 off your first purchase or

subscription at risk of sounding

offensive it doesn't really look like

much they've got a flat copper bottom

that sits on your CPU or SOC any heat

generating component on the top you've

got these kind of paper filters over the

intake flexible PCB that goes into their

drive system and then at the back

there's a tapered section that leads to

a skinny little exhaust and it's there

that the unimpressed completely

disappear I mean this thing hauls but

they are blowing air at over 200

kilometers an hour through those filters

and Blasting it onto the copper plate

but here's the thing moving air is just

a means to an end it's only part of the

battle we don't really want to move air

what we want to do is remove heat let's

take it apart to see if we can get a

better understanding of just what's

going on here

I cannot believe they're letting us do

this here's the completed cooling module

which I've shown you already and here it

is completely torn down into its

constituent components it starts with

yeah this really is just a sticker four

little paper filter windows in it okay

and then we can get into what I would

call the cooling engine it uses

piezoelectrics and we did a full video

about this recently but basically a

piezoelectric material vibrates when you

apply an alternating current to it so

what you're looking at in the top is

these intake slits that pull air through

those filters okay then out the bottom

they've got all these little jets that

blow down onto here's the last component

this kind of crappy flat copper spreader

I mean

okay I get it you want to keep this

thing thin it's just 2.8 millimeters and

that's critical for getting the design

in thin and light devices like like

laptops but every cooling plate that

I've ever seen that doesn't totally suck

has got fins or other structures to help

increase the surface area

what is going on here to find out we

need to go back to the cooling engine or

the cooling chip as they call it on the

underside there are 80 small openings

called impingement Jets they were only

willing to let us open up an older

prototype that has twice as many but you

should still be able to get the idea

here and these jets are a huge part of

the Special Sauce that makes this

cooling solution so unique we've shown

many times in the past but there are

diminishing returns as you blow air

faster and faster over a heatsink this

is because of something called The

Boundary layer check out this

illustration from Wikipedia see no

matter how fast your air is moving sort

of near a heatsink fin the speed of it

is always going to approach zero as it

reaches the actual Fin and this is due

to friction what happens then is this

creates a blanket of insulating air that

prevents heat from being removed from

the fin efficiently well what Roar has

done is they've used these Jets of super

high velocity high pressure air to

completely obliterate the boundary layer

this increases effective heat

dissipation by about five times for the

same airflow and functionally saturates

the air with heat bringing it up to

nearly the same temperature as the

copper heat spreader now an airjet mini

is good for about five watts of cooling

at room temperature assuming the die is

at about 85 degrees so naturally I asked

them well can you just take a bunch of

these throw them on a vapor chamber and

and of course they've already done that

this Samsung thinning light right here

has been modified with three airjet

minis for a total of 15 watts of active

cooling on top of the passive

dissipation through the chassis now they

could have put a fourth one on here but

this machine wasn't designed in

collaboration with thror so they had to

improvise a little bit and as you can

see there's some PCB there that wouldn't

very much like to be chopped off this is

such a good demo here because they've

got their four modified laptop here

running right next to an unmodified one

showing some key benefits so first up

check this out using our thermal camera

we can actually see that if we look at

the exhaust temperature behind the

system our floor is at about 41 degrees

while the regular cooler is at about

35. this can be partially explained by

the heat saturation of the air like I

talked about before but part of it is

also that our Ferrar laptop is running

about 10 degrees hotter

wait but that's a good thing let me

explain

in many laptops the performance

limitation is actually not the

temperature of the CPU or the soc rather

it's because of the external temperature

of the device anything above about 45

degrees Celsius will eventually burn the

user so thin and light laptops will

already throttle performance if the hot

spot on the bottom exceeds this level

that is where the air Jet's second big

party trick comes in aside from not

needing a fan it is extremely high

static pressure for our systems claims

that an airjet mini manages about 10

times the static pressure of a MacBook

Pro cooler over 1700 pascals that allows

it to suck air through restrictive

openings much more effectively than a

conventional fan which improves cooling

not just of the CPU that it's installed

on top of but of the entire system

so because the skin temperatures of our

two laptops are so different the floor

system CPU is actually operating at 33

percent higher power that is going to

have a dramatic impact on performance

that's why the chip is running hotter

another advantage of the high static

pressure is dust resistance typically a

laptop can't be both actively cooled and

dust proof unless you create a separate

compartment for the fan and heatsink

kind of like what they do in some rugged

machines that is not a great solution

for a thin and Light

but with the air jet there's the dust

filter that's on the airjet module

itself and you can also use that

pressure that that suction ability to

install dust filters on the intake of

the device without trashing your airflow

so you could have it pull air through a

filter here put air through another

filter here and blow it out the back

cooling the entire device and the best

part they built in a reverse like blast

out cleaning solution for the filters so

they should last five years and Beyond

without getting gummed up even though

they're just basic paper dust filters

this dust resistance is what made the

airjet perfect for their first

commercial product the Zotac z-box Pico

with airjet this Mini PC is intended to

be used on Factory floors where dust and

debris could easily clog up a normal fan

cooled device

now in the past Zotac got around this by

just passively cooling the CPUs in these

devices but that limited them to a 5

watt Celeron Processor with this dual

airjet mini solution though they can now

use a 15 watt core I3 which takes them

from two cores to eight that is a

massive performance uplift and we can

see the difference right behind me where

they've got one of these systems running

passively this is with the core I3

showing how it's thermal throttling to

hell and then they've got the four

systems cooled model where you can see

the performance is a lot better and this

is still early stages they're expecting

to be able to get CPU power up a fair

bit by improving the efficiency of the

rest of the device

that is all really impressive and

changes my question from why did you

guys need to be in stealth for four

years too how did you do this at all

as we saw in our piezoelectric fan video

ensuring that you hit the resonant

frequency can have a huge impact on

performance and the thermal expansion of

the vibrating membranes is enough to

knock it out of whack meaning that they

have to constantly change the input

frequency between 23 000 to 24 000 Hertz

to ensure that it's always operating at

Peak efficiency that brings the full

power consumption of each chip to just

one watt at Full Tilt

that's not bad for five watts of cooling

each for context that would allow you to

handle a 15 watt system with two air

Jets and would cost you only about two

watts of power for heat dissipation

that's almost identical to a small fan

like the one on the steam deck which is

two and a half watts and takes up more

space

but hold on a second here Linus when you

guys showed off that expensive

piezoelectric fan a while back it had

low power consumption sure and it was

dust proof but it had none of these

other benefits where was the high

pressure okay I'm getting there you've

heard me a couple of times refer to the

air jet as a chip well I asked them what

makes it a chip like does it have some

onboard processing or something the

answer is no but that doesn't make them

big Liars achieving the kind of one-way

valve operation that gives this cooler

such high static pressure it takes a lot

more than just a vibrating tongue

depressor like we saw last time so like

a chip the air jet is precisely

manufactured using photolithography the

same process as you would use to build a

CPU or a GPU you coat the cooling engine

layer by layer with photo resist then

expose it to light and etching chemicals

and remove the unneeded material this is

inherently a two-dimensional process so

the air jet gets built up one layer at a

time until we have our final little air

blaster

now the manufacturing process is a big

part of the reason that the airjet is

only going to be found in premium

devices at least for the time being

where you can justify that additional

cost with the additional performance

that it can unlock because see the thing

is while photolithography is a well

understood and fairly mature

manufacturing process especially at a

relatively macro scale like this Ferrar

is working with entirely new

non-silicate materials that required

extensive r d and brand new Machinery to

manufacture at any sort of scale

and high cost isn't the only bad news

while their demo here does a really good

job of showing how the fur system

outputs less overall sound than the

conventional fan I found that the

quality of the noise that is that it's

at a bit of a higher pitch made it

significantly more noticeable the good

news is that there are clear paths to

resolving at least some of these

problems in the future while the airjet

mini outputs laminar airflow in order to

make it quieter this laptop wasn't

designed with the airjet mini in mind

and it's blasting that air at the bottom

of this hinge and the bottom of the

screen increasing turbulence and

increasing noise they can actually

adjust the nozzle in a device that's

built for their cooler to help alleviate

this issue and there's more the road map

these guys are showing looks extremely

promising when they went out of Stealth

at CES they showed what the airjet mini

but there's more even at their current

manufacturing node so to speak they can

already build higher performance

solutions the airjet pro is twice the

size and manages to remove twice the

heat about 10 watts at only 1.7 times

the power consumption so devices like

laptops could easily have a bank of like

four of these sitting along the back

cooling up to a 45 watt chip as long as

you've got a vapor chamber to spread the

Heat and oh the best part

you wouldn't even like need a bottom

intake anymore so you can put your

laptop down on your bed and it's not

going to overheat because you could just

draw air in from anywhere

so cool

and it can be used on just about

anything aside from computers they're

showing off LED light fixtures at like

one tenth the overall volume they've got

uh oh check this out actively cooled

ssds that are operating it out okay that

one's really hot the the knot for a

cooled one uh smart like iot devices

like want to overclock your ring

doorbell

with an airjet mini they figured you

could do about eight watts compared to

the 3.3 Watts that is allowed with the

passive stock configuration I mean

what's next I'd love to see this thing

modded into an Rog Ally or a steam deck

too many should do the trick right Alex

oh yeah is that a project you guys want

to see oh what about in a phone I mean

there's gaming phones with fans and

water cooling in them already why not

this black shark RG phone team

you guys up

and what's really wild is this is all

just with the current gen their Material

Science folks do see a path to doubling

their performance per unit area every

couple of years for the next little

while we could see thin and light gaming

PCs with 70 class Nvidia Graphics in

just a few short years and I'm not

talking the cooling limited ones that we

see today I'm talking full performance

the main levers that they're going to be

using to do this are higher amplitude

vibrations and higher frequency

vibrations which makes sense and so that

combined with if they can bring costs

down

I mean they wouldn't go as far to say it

see they're not going to say it right

now but when I asked are you guys trying

to make fans just obsolete caught one of

their technical guys nodding in the

background huh yeah it's not impossible

that they could even get the cost

competitive you see the thing is a

motorhub is always going to have a fixed

cost because of like magnets and stuff

but if they're able to scale in a

Moore's Law kind of way well let me put

it this way the hard drive industry

thought it would always be safe from low

capacity ssds and they cost so much and

where are they at now

fur says that their process is similar

to TV panel manufacturing where the

larger they can get the mother glass the

bigger the panels they can build at

lower costs well that sounds pretty good

given TVs have been one of the only

thing that's been inflation proof lately

so right now yeah the costs are high but

that's because they're operating at a

very small manufacturing scale because

it's so new that could all change

just like the Segway changed from what

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at the link below if you guys enjoyed

this video go check out our video on the

piezoelectric fan that costs us eleven

hundred dollars how far we've come in

like six months was that six months ago

a year wow