running a pc in a mini fridge just doesn't work do you know what does
hooking up this 3 000 watt refrigeration cooler directly to a CPU at least i sure
hope it does by the end of this video with any luck brian the electrician will
have transformed this gutted mini split into a CPU cooler and pulled a core i7
down to what like negative 40 degrees celsius it's gonna be really stupid and
huge thanks to thermal grizzly for sponsoring it
first thing we need to do is figure out where the heck the thermostatic expansion valve is we've got our
condenser here it sends liquid to the evaporator that turns all of your liquid
into vapor with a u sends it back to here into the compressor and if liquid
gets sent back into the compressor well you put something that's incompressible
into a compressor things get really bad really fast that's why you need a tvx
turns out it's right here which is great because we were afraid it would be on the evaporator the second thing we had
to do is figure out how the heck this turns on and off so this part right here
goes into your house and it's responsible for like connecting to wi-fi
and sending a signal to the outdoor unit which actually does the real cooling
stuff i don't want to go down the electronics engineering rabbit hole for
the next 16 hours so we're just gonna take this out and
use it as is now i just need to go spend a lot of money on copper honestly this
is gonna be really expensive i'm sorry lines let's look at what we're going to turn
our 200 of raw copper into using the tormach you're probably familiar with
how CPU water blocks work and this is kind of like that but instead of using
water to cool down your CPU for using the phase change of a refrigerant via a
copper tube our refrigerant will be aimed directly at the CPU when it goes
from the small diameter and high pressure of the tube to the comparatively massive space in here the
refrigerant should go from a liquid to a vapor with the phase change absorbing
loads of heat in the process after that we've created a maze of copper for the
refrigerant to navigate before making its way back out the top to create this
maze we'll need to machine four copper layers and then solder them all together
sealing the whole thing and not allowing any refrigerant to escape which might be
a bit difficult given that there might be over like two 300 psi in here this is
my first time running the 16th inch so we'll see if we blow it up i guess
yeah that seems to be working that tool is great for chip evacuation
so i think we're good
never mind i'm almost wondering if we should
actually put a little bit of an orifice in the end of the tube because with this
sitting here we're still gonna have a pretty big opening we could just crush the end of that this is just the most
yolo evaporator one thing we are going to have to be careful to do is make sure
we put this through the top layer
before we solder it down to the lower layer because otherwise it won't go in it
wouldn't be great and i'm gonna have to get this to sit up a little tighter
because uh we're winding up with a bit of a gap so
i'll have to work on the end of this a little bit to make it all fit
yep this is why you double check everything when you're running new code
this was supposed to be a helix and it is there but there's not enough space so
it decided instead it was going to plunge the tool rate down to the final
depth and then do a cut which with a 16 inch cutter would have definitely blown
it right up so we're going to fix that ground the end down a little bit got the
end opened back up and okay that's gonna fit so once we get the
two major pieces soldered together here i can solder the tube in and that'll
seal it into this lower layer and then as we add layers i can solder the tube
where it passes through each layer
final piece of copper this one looks pretty good too the nice stepped edges
oh my tap just broke in there i guess this was a very shitty tap
that's cool now should do
oh it's finally time yeah
i might need the big head
this is way too hot for the flare to figure out what it is
shoot it's actually soldered to the bodies
uh we have fire bricks down there for when you figure out how to get it off
yeah i think we're going to need that i'll try to move it okay so wow it's
mold
so what have we learned brian firebricks are our friends
yeah don't solder it to the vice that's a first for me does anyone want
hearing protection what's that
have you ever seen a fire brick glow red it's been real hot oh yeah
is that straight close enough yeah you can feel the heat just
radiating off
the coolant spraying off of the thing and hitting this screw hole and coming
out need to fix that at some point what do you mean you fixed it there's a bucket
still really hot but the fire bricks are the hottest part
i dare you to lick it i'll give you 10 bucks i have an idea oh
yeah the top tool down
oh yeah it is working
alex there's enough thermal mass here you could use this thing as a heater i
just have to let it cool for a while and i can clean it up get some bare
copper again and then we'll solder on the last layer we can solder the hookups
and let it cool again and then we can pressure test it
definitely going to need to surface the bottom
done wow i don't think it's going to leak we did
go through about a quarter tank of acetylene that's a lot of potato cannon shots would you really want to use
acetylene for that i mean i i've seen potatoes shot with compressed air before
oh yeah i've i've used acetylene the first time we shot it my dad was like
you guys can't shoot that on the deck anymore because the Windows move too
much it's got some good weight to it that's
for sure we're in brian's truck to do the last bit here we just want to
pressure test this those jump
400 psi if there are any leaks that should
actually show up even just my pressures fairly fast just because it's such a
small volume we're good no bubbles
good freaking job on the solder lock's pressure tested now we just need to get
it ready to go on the CPU
most of the crap is gone now but during all the soldering heating up cooling
down and so on this might be very far from flat so fortunately we have a
lapping plate here we're just going to mix up some oil oh not that much
and a little bit of this stuff right here it's just
what would you even call this and now i just do this for quite a while
the lapping about halfway through made the bottom look like it was sandblasted
which reminded me that we have a sandblaster why does this thing look like garbage it should look like a 300
part that is so there we go look at that
out of the sandblaster the surface finish on this thing is incredible i
also went in lapped the bottom once more it's not a mirror finish but who cares
we have thermal grizzly that'll fill in all the little gaps there and now it's
time for the hardest part of this
this is truly awful what you're doing if you've never seen a motherboard
prepped for sub-zero before this is probably going to be real hard
to watch but i swear this is much better than not doing it
just see the vaseline squishing out this
poor 8700k i'd say that it didn't deserve this but
like it's gonna be a real fast 8700k by the end of the day so what are the
chances this dies i really don't think
we're going to kill this CPU especially given how much vaseline i just put on
here but there's a reason that we're doing this on not our best CPU the first
time i think it'll be fine though this is so gnarly brandon
oh this is so hard to turn everything so slippery from all the vaseline so we
have electrical it's right in here and now it's time to connect this up and
fill it with refrigerant well first we have to pull it all down into a vacuum
oh now it's time to pull it down to a vacuum we pull it into a vacuum to make
sure that there's no contaminants nitrogen doesn't compress very well at
least not in an ac system you will probably get some condensation on the
low pressure side yeah if it's a problem we can just insulate the whole thing
gotta use the sponsor of this video oh good old thermal grizzly cryo now make
sure it's reading really actually so the sensor needs to get taped there
but we also just need to insulate the whole thing
regardless so i'm going to use the insulation tape stuff
oh we need an allen key for those okay do you think the chances are that one
allen key we don't have is the one we need that's definitely too big
so i'm gonna say chances are probably pretty good
we have the electrical connected this is mostly a box now we also have our
electrical here running to it which maybe works maybe doesn't hopefully we
can get refrigeration into it all are we good yep all right let's hit it
oh is it on yeah
oh that's cold
oh e6 okay so it just shut down
but that definitely got quite cold do we
have a manual for this thing e6 malfunction of indoor fan motor
exactly what you thought all right let's plug that in
oh no i i was thinking just pull the motor itself out oh yeah that's more smarter i
was thinking we just chucked the whole thing on the table well i mean we could just for a quick test but it would be so
good to cool a whole computer with this i actually mounted in the front of a
tower oh my fan's coming on
so our controller isn't happy because it's 17 degrees in here and the lowest
this will go is 16 degrees so when do you heat up the temperature probe before
it'll kick on we don't want to melt the probe
it's on low there we go you can start to see the condensation on it negative
three negative four it's still going cool the lines are cool
this whole thing is frosted up well should we connect it to a CPU i think so
okay i'm very ready to
turn this off this is getting very cold very fast i'm negative eight now
this is really about as jank as this could ever get
oh wait jeez thermal paste yeah thermal grizzly would not have been happy if we
forgot to put it on so yeah thermal grazing sponsored this
video and we are going to be using their cryonot they do have liquid metal as
well but that will just be metal at
these kinds of temperatures the cryonop is good for down to what
like negative 200 degrees celsius something absolutely ridiculous like
that oh wow nice CPU temperature of negative three degrees celsius right now
not a bad start uh let's try what five
gigahertz 5.1 let's try 5.3 and just see
what happens we have so much cooling let's try 1.36
we'll probably just get a blue screen but whatever oh it kicked off sweating yeah it's
sweating pretty bad should have encased the whole board in
vaseline in case something drips down on it no and Windows is not happy it's not
even a stability error it's just stupid this drive has risen
on it it's not our jank cooling setup it's a driver issue
yay nope
your piece of sh well it definitely works although we're having trouble with
the electronics it seems to have some sort of like a defrost cycle or
something like that for our purposes it's terrible so preface absolutely do
none of this we have a professional electrician and electrical engineer but
uh basically we're bald steep in this we were hoping just the compressor
our hope was that the compressor just ran off of ac so we could just have a
switch turn the switch on compressor runs
we have coal to clarify we were hoping the compressor just ran off single phase
ac it's looking like it's actually a three-phase motor so what we've figured
out is that most of the electronics garbage is to just
feed it three-phase ac we have that here we could just plug it in and send it
full send on the three phase how do you improve it with this i'm legally
obligated to say no
this is lct we just we just send it and see yeah we're already way past that you
should not do this at home we'll learn for the day right
so we thought we figured it out but then 190 volts dc at 180 hertz
dc is like one of those marketing spunk things and it's actually just a
three-phase tesla motor not not tesla's in the company tesla is the inventor yes
but basically instead of making it dumb it might be easier to scoop the signal
at this point i mean you could just look up three phases and see what happens i
just really don't want to blow up the compressors
making it dumb was a lot harder than we thought it would be
either we can spoof all of the different thermal probes and just potentiometer
them until everything's happy or we can come to this board here and try to
figure out what the enable pin is so now i get to spend all of today spoofing
thermocouples hoping that works feed it whatever it wants and it'll run it's
probably going to be the only mini split in existence with thermal grizzly for
its chips this is the temperature probe that was on the evaporator and it seemed
to shut down when we hit about negative 20 degrees it might have been because of
this it might have been because of something in here but we're gonna test
it out with this just at ambient temperature and see what happens
oh there we go
yep so that temperature's dropping and quickly and how do we just give it a
minute wobble's concerning a little worrying hey jamie hi i dare you to
stick your belly in there so we're now into the negatives on the block this is
where we might be shutting down kind of soon but we'll see if it gets all frosty
like this and then shuts off all of this frost is immediately turning into water
because it warms up pretty fast that's really bad as you can probably imagine
the compressor also is starting to frost up so that's why i'm concerned that the
problem isn't our evaporator but one of the sensors in here is making a kick
into a defrost cycle this is where having a proper shroud on this probably
would help a lot we're having a lot of blowback it's at negative 14 degrees now
it seems to be struggling to get below 14 degrees yeah it's actually warming up
right now a little bit so that's probably the issue all right let's put
the shroud back on for better cooling and try this again
come on eat up kick on
come on do it that's a lot less sketchy with it
properly secured so we should now see the radiator temp go up as the
evaporator goes down which is exactly what's happening wonderful i wonder if
turbo will help us
if it's actually so stupid that just this sensor hitting negative 20 shuts it
off that would be amazing i think the way to get it colder would be to pull
down the radiator so we need to do two stages take our other air conditioner
hook it up to this that would probably work
we're close to the moment of truth if we're able to hold negative 20 that
means i can finally finish its project holy prank this has been a lot of work
thermal grizzly you really got your money's worth with this one geez
oh negative 20. there we go still dropping radiator attempts actually gone
up a little bit which is cool it looks like we're not dropping anymore
though we're probably just right at the limit of what this is able to do like i can feel a bit of the heat coming
through and that might be enough to stop it from going any lower it's looking
good if it's this dumb i'm really happy like they did a good job i guess because
like who wants something that's negative 20 inside of their house look at all
that frost i really hope this works if this is the
last time that i apply some thermal grizzly cryon huh i am so sorry roman
this is
going for the hard mount of course i just want to get ahead of the comments
here i do not the 8700k is still a very good chip especially when overclocked
like this one's going to be it's really fast still i'm going to turn
the ac on now
because it can take a little bit oh that kicked on
our nice safety shop towels
that's already very cold yeah that's sub-zero all right
so our CPU is currently at zero degrees that's that's pretty good to start off
with it's kind of weird that it isn't lower i
don't know if during a cinebench run if this has the heat dissipation to deal
with that but we're about to find out the temperatures it increased to 38
degrees oh my god that's so warm
4.8 gigahertz all core it seems like it's doing fine i don't see any
condensation it's holding at 38 degrees
that is fantastic well the overclock isn't holding quite like i'd like but it
still proves this works amazingly well i could fiddle with it more but i want to
save all of my fiddling for the 12th gen in another video that is cold
so huge thanks to thermal grizzly for sponsoring this video get some cryonot
or conduct or not i don't know chuck it in your laptop your GPU wherever you
want i don't know don't eat it probably i guess unless you want to
so if you like this video hit like get subscribed and maybe watch your video
where we subzero cooled the alienware area 51m with steve that thing was
insanely cool and very scary