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the world was absolutely Blown Away pun
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intended when four systems came out of
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stealth after four years of building a
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solid-state cooling system that sucks
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a lot of air look at this thing
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and here we are six months later with
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everything basically fully uncovered
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they've got multiple solid-state cooled
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PCS torn down air jet minis for us to
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peek inside and they're even teasing a
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more powerful version with double the
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cooling capacity and here's double the
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segue to our sponsor segue to our
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sponsor xsplit looking to take your
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is a software company that provides
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simple yet effective broadcasting and
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video production tools check them out at
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the link below and use code Linus for a
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very nice 69 off your first purchase or
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subscription at risk of sounding
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offensive it doesn't really look like
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much they've got a flat copper bottom
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that sits on your CPU or SOC any heat
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generating component on the top you've
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got these kind of paper filters over the
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intake flexible PCB that goes into their
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drive system and then at the back
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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
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disappear I mean this thing hauls but
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they are blowing air at over 200
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kilometers an hour through those filters
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and Blasting it onto the copper plate
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but here's the thing moving air is just
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a means to an end it's only part of the
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battle we don't really want to move air
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what we want to do is remove heat let's
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take it apart to see if we can get a
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better understanding of just what's
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going on here
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I cannot believe they're letting us do
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this here's the completed cooling module
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which I've shown you already and here it
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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
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little paper filter windows in it okay
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and then we can get into what I would
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call the cooling engine it uses
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piezoelectrics and we did a full video
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about this recently but basically a
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piezoelectric material vibrates when you
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apply an alternating current to it so
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what you're looking at in the top is
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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
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blow down onto here's the last component
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this kind of crappy flat copper spreader
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I mean
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okay I get it you want to keep this
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thing thin it's just 2.8 millimeters and
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that's critical for getting the design
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in thin and light devices like like
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laptops but every cooling plate that
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I've ever seen that doesn't totally suck
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has got fins or other structures to help
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increase the surface area
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what is going on here to find out we
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need to go back to the cooling engine or
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the cooling chip as they call it on the
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underside there are 80 small openings
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called impingement Jets they were only
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willing to let us open up an older
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prototype that has twice as many but you
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should still be able to get the idea
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here and these jets are a huge part of
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the Special Sauce that makes this
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cooling solution so unique we've shown
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many times in the past but there are
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diminishing returns as you blow air
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faster and faster over a heatsink this
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is because of something called The
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Boundary layer check out this
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illustration from Wikipedia see no
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matter how fast your air is moving sort
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of near a heatsink fin the speed of it
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is always going to approach zero as it
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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
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the fin efficiently well what Roar has
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done is they've used these Jets of super
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high velocity high pressure air to
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completely obliterate the boundary layer
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this increases effective heat
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dissipation by about five times for the
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same airflow and functionally saturates
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the air with heat bringing it up to
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nearly the same temperature as the
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copper heat spreader now an airjet mini
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is good for about five watts of cooling
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at room temperature assuming the die is
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at about 85 degrees so naturally I asked
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them well can you just take a bunch of
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these throw them on a vapor chamber and
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and of course they've already done that
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this Samsung thinning light right here
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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
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dissipation through the chassis now they
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could have put a fourth one on here but
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this machine wasn't designed in
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collaboration with thror so they had to
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improvise a little bit and as you can
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see there's some PCB there that wouldn't
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very much like to be chopped off this is
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such a good demo here because they've
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got their four modified laptop here
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running right next to an unmodified one
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showing some key benefits so first up
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check this out using our thermal camera
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we can actually see that if we look at
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the exhaust temperature behind the
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system our floor is at about 41 degrees
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while the regular cooler is at about
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35. this can be partially explained by
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the heat saturation of the air like I
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talked about before but part of it is
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also that our Ferrar laptop is running
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about 10 degrees hotter
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wait but that's a good thing let me
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explain
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in many laptops the performance
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limitation is actually not the
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temperature of the CPU or the soc rather
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it's because of the external temperature
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of the device anything above about 45
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degrees Celsius will eventually burn the
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user so thin and light laptops will
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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
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party trick comes in aside from not
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needing a fan it is extremely high
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static pressure for our systems claims
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that an airjet mini manages about 10
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times the static pressure of a MacBook
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Pro cooler over 1700 pascals that allows
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it to suck air through restrictive
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openings much more effectively than a
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conventional fan which improves cooling
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not just of the CPU that it's installed
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on top of but of the entire system
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so because the skin temperatures of our
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two laptops are so different the floor
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system CPU is actually operating at 33
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percent higher power that is going to
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have a dramatic impact on performance
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that's why the chip is running hotter
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another advantage of the high static
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pressure is dust resistance typically a
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laptop can't be both actively cooled and
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dust proof unless you create a separate
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compartment for the fan and heatsink
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kind of like what they do in some rugged
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machines that is not a great solution
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for a thin and Light
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but with the air jet there's the dust
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filter that's on the airjet module
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itself and you can also use that
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pressure that that suction ability to
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install dust filters on the intake of
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the device without trashing your airflow
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so you could have it pull air through a
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filter here put air through another
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filter here and blow it out the back
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cooling the entire device and the best
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part they built in a reverse like blast
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out cleaning solution for the filters so
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they should last five years and Beyond
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without getting gummed up even though
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they're just basic paper dust filters
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this dust resistance is what made the
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airjet perfect for their first
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commercial product the Zotac z-box Pico
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with airjet this Mini PC is intended to
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be used on Factory floors where dust and
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debris could easily clog up a normal fan
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cooled device
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now in the past Zotac got around this by
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just passively cooling the CPUs in these
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devices but that limited them to a 5
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watt Celeron Processor with this dual
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airjet mini solution though they can now
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use a 15 watt core I3 which takes them
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from two cores to eight that is a
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massive performance uplift and we can
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see the difference right behind me where
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they've got one of these systems running
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passively this is with the core I3
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showing how it's thermal throttling to
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hell and then they've got the four
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systems cooled model where you can see
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the performance is a lot better and this
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is still early stages they're expecting
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to be able to get CPU power up a fair
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bit by improving the efficiency of the
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rest of the device
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that is all really impressive and
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changes my question from why did you
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guys need to be in stealth for four
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years too how did you do this at all
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as we saw in our piezoelectric fan video
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ensuring that you hit the resonant
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frequency can have a huge impact on
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performance and the thermal expansion of
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the vibrating membranes is enough to
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knock it out of whack meaning that they
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have to constantly change the input
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frequency between 23 000 to 24 000 Hertz
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to ensure that it's always operating at
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Peak efficiency that brings the full
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power consumption of each chip to just
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one watt at Full Tilt
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that's not bad for five watts of cooling
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each for context that would allow you to
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handle a 15 watt system with two air
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Jets and would cost you only about two
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watts of power for heat dissipation
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that's almost identical to a small fan
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like the one on the steam deck which is
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two and a half watts and takes up more
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space
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but hold on a second here Linus when you
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guys showed off that expensive
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piezoelectric fan a while back it had
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low power consumption sure and it was
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dust proof but it had none of these
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other benefits where was the high
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pressure okay I'm getting there you've
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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
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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 one-way
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valve operation that gives this cooler
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such high static pressure it takes a lot
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more than just a vibrating tongue
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depressor like we saw last time so like
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a chip the air jet is precisely
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manufactured using photolithography the
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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
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and remove the unneeded material this is
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inherently a two-dimensional process so
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the air jet gets built up one layer at a
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time until we have our final little air
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blaster
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now the manufacturing process is a big
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part of the reason that the airjet is
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only going to be found in premium
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devices at least for the time being
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where you can justify that additional
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cost with the additional performance
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that it can unlock because see the thing
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is while photolithography is a well
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understood and fairly mature
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manufacturing process especially at a
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relatively macro scale like this Ferrar
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is working with entirely new
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non-silicate materials that required
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extensive r d and brand new Machinery to
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manufacture at any sort of scale
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and high cost isn't the only bad news
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while their demo here does a really good
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job of showing how the fur system
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outputs less overall sound than the
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conventional fan I found that the
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quality of the noise that is that it's
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at a bit of a higher pitch made it
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00:12:00,721 --> 00:12:02,760
significantly more noticeable the good
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00:12:02,761 --> 00:12:04,500
news is that there are clear paths to
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resolving at least some of these
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problems in the future while the airjet
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00:12:08,221 --> 00:12:11,100
mini outputs laminar airflow in order to
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make it quieter this laptop wasn't
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designed with the airjet mini in mind
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and it's blasting that air at the bottom
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00:12:18,601 --> 00:12:19,980
of this hinge and the bottom of the
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screen increasing turbulence and
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increasing noise they can actually
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adjust the nozzle in a device that's
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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
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promising when they went out of Stealth
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at CES they showed what the airjet mini
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00:12:40,071 --> 00:12:42,380
but there's more even at their current
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00:12:42,381 --> 00:12:45,240
manufacturing node so to speak they can
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00:12:45,241 --> 00:12:46,860
already build higher performance
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00:12:46,861 --> 00:12:51,000
solutions the airjet pro is twice the
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00:12:51,001 --> 00:12:53,630
size and manages to remove twice the
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00:12:53,631 --> 00:12:57,360
heat about 10 watts at only 1.7 times
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the power consumption so devices like
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00:12:59,701 --> 00:13:03,120
laptops could easily have a bank of like
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four of these sitting along the back
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00:13:04,921 --> 00:13:08,450
cooling up to a 45 watt chip as long as
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00:13:08,451 --> 00:13:10,070
you've got a vapor chamber to spread the
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Heat and oh the best part
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you wouldn't even like need a bottom
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00:13:15,121 --> 00:13:16,620
intake anymore so you can put your
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00:13:16,621 --> 00:13:18,830
laptop down on your bed and it's not
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00:13:18,831 --> 00:13:20,100
going to overheat because you could just
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00:13:20,101 --> 00:13:22,380
draw air in from anywhere
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so cool
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and it can be used on just about
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00:13:25,561 --> 00:13:27,830
anything aside from computers they're
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showing off LED light fixtures at like
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one tenth the overall volume they've got
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00:13:33,481 --> 00:13:36,420
uh oh check this out actively cooled
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00:13:36,421 --> 00:13:39,540
ssds that are operating it out okay that
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00:13:39,541 --> 00:13:41,630
one's really hot the the knot for a
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00:13:41,631 --> 00:13:44,700
cooled one uh smart like iot devices
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00:13:44,701 --> 00:13:47,760
like want to overclock your ring
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00:13:47,761 --> 00:13:48,830
doorbell
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00:13:48,831 --> 00:13:51,000
with an airjet mini they figured you
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00:13:51,001 --> 00:13:53,450
could do about eight watts compared to
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00:13:53,451 --> 00:13:56,700
the 3.3 Watts that is allowed with the
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00:13:56,701 --> 00:13:58,920
passive stock configuration I mean
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what's next I'd love to see this thing
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00:14:00,771 --> 00:14:03,480
modded into an Rog Ally or a steam deck
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00:14:03,481 --> 00:14:05,390
too many should do the trick right Alex
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00:14:05,391 --> 00:14:07,320
oh yeah is that a project you guys want
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00:14:07,321 --> 00:14:10,200
to see oh what about in a phone I mean
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00:14:10,201 --> 00:14:12,240
there's gaming phones with fans and
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00:14:12,241 --> 00:14:14,330
water cooling in them already why not
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this black shark RG phone team
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00:14:17,631 --> 00:14:19,440
you guys up
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00:14:19,441 --> 00:14:22,010
and what's really wild is this is all
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00:14:22,011 --> 00:14:24,540
just with the current gen their Material
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00:14:24,541 --> 00:14:27,240
Science folks do see a path to doubling
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00:14:27,241 --> 00:14:29,760
their performance per unit area every
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00:14:29,761 --> 00:14:31,440
couple of years for the next little
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00:14:31,441 --> 00:14:33,890
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
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talking the cooling limited ones that we
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00:14:42,001 --> 00:14:45,420
see today I'm talking full performance
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00:14:45,421 --> 00:14:47,040
the main levers that they're going to be
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00:14:47,041 --> 00:14:49,260
using to do this are higher amplitude
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vibrations and higher frequency
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00:14:51,421 --> 00:14:55,260
vibrations which makes sense and so that
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00:14:55,261 --> 00:14:57,300
combined with if they can bring costs
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00:14:57,301 --> 00:14:58,320
down
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00:14:58,321 --> 00:15:00,770
I mean they wouldn't go as far to say it
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00:15:00,771 --> 00:15:02,390
see they're not going to say it right
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00:15:02,391 --> 00:15:05,270
now but when I asked are you guys trying
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00:15:05,271 --> 00:15:08,630
to make fans just obsolete caught one of
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00:15:08,631 --> 00:15:10,130
their technical guys nodding in the
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00:15:10,131 --> 00:15:13,680
background huh yeah it's not impossible
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00:15:13,681 --> 00:15:15,360
that they could even get the cost
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00:15:15,361 --> 00:15:18,060
competitive you see the thing is a
371
00:15:18,061 --> 00:15:20,160
motorhub is always going to have a fixed
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00:15:20,161 --> 00:15:22,500
cost because of like magnets and stuff
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00:15:22,501 --> 00:15:24,890
but if they're able to scale in a
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00:15:24,891 --> 00:15:26,880
Moore's Law kind of way well let me put
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00:15:26,881 --> 00:15:28,620
it this way the hard drive industry
376
00:15:28,621 --> 00:15:30,950
thought it would always be safe from low
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00:15:30,951 --> 00:15:34,010
capacity ssds and they cost so much and
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00:15:34,011 --> 00:15:35,450
where are they at now
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00:15:35,451 --> 00:15:38,330
fur says that their process is similar
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00:15:38,331 --> 00:15:40,680
to TV panel manufacturing where the
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00:15:40,681 --> 00:15:42,890
larger they can get the mother glass the
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00:15:42,891 --> 00:15:44,880
bigger the panels they can build at
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00:15:44,881 --> 00:15:47,760
lower costs well that sounds pretty good
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00:15:47,761 --> 00:15:49,070
given TVs have been one of the only
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00:15:49,071 --> 00:15:50,820
thing that's been inflation proof lately
386
00:15:50,821 --> 00:15:54,420
so right now yeah the costs are high but
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00:15:54,421 --> 00:15:56,330
that's because they're operating at a
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00:15:56,331 --> 00:15:58,130
very small manufacturing scale because
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00:15:58,131 --> 00:16:01,070
it's so new that could all change
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00:16:01,071 --> 00:16:03,830
just like the Segway changed from what
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00:16:03,831 --> 00:16:06,890
we wrote to our sponsor Sweetwater when
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this video go check out our video on the
411
00:16:47,221 --> 00:16:49,070
piezoelectric fan that costs us eleven
412
00:16:49,071 --> 00:16:51,120
hundred dollars how far we've come in
413
00:16:51,121 --> 00:16:53,220
like six months was that six months ago
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a year wow
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