Our DIY CPU Chiller From AliExpress is RIDICULOUS

[@tronique5736]

The TECs did not draw the full amount of power expected because the supply voltage was too low. Looking at the data sheet for TEC1-12710, these modules will need up to 17V, but the supply used was only 12V.

[@RedRingOfDead]

Makes sense indeed. I was sure something was off. This was it. Thanks for confirming

[@Coolfwip]

Holy shit, theres more

[@allenfunstuff]

Shall we talk about the failure to place the reservoirs above the tubing so that all the air naturally would migrate out or how about the use of metal bolts between the rails holding the peltier modules between pieces of metal shouldn't plastic nuts and bolts have been used to reduce the transfer of thermal energy through them oh well it was fun 😄

[@panospapadopoulos]

@@allenfunstuff HAHAHA I was sure something was tickling my brain when the water could not reach the top and the answer *MORE PUMP* looked dog

[@jaysengstacken2118]

What, you think these guys are experts or something?

[@tayloraldridge3063]

Alex's cooling ideas are honestly my favorite videos

[@andrelascasas3156]

When he actually tries and don't just half ass it, they are nice

[@achaerna.6662]

His video ideas are the most interesting thing on the channel for sure. I'd be way more into the boring "we bought a mansion" videos if Alex was doing all the HVAC.

[@KirkLazurus]

Still not as ambitious or cool as whole room water cooling.

[@squareacid]

next time they just dump the whole pc into ln2

[@hmello3250]

agreed

[@IAmCoopa]

As an engineer I absolutely love all of this whacky engineering content, I would 100% love to watch longer format videos that keep dive into some of this stuff more.

[@xovouaed]

Really hoping they release more on Floatplane for things like this! Would love more details.

[@glxytoni]

Floatplane probably

[@rherydrevins]

"Engineering". Michael Reeves is more of an engineer than Alex is. So is Electroboom, Adam Savage, Simone Giertz, Integza, Joel Creates... heck, even Dan, on this very channel, is a better engineer.

[@Lullabbbyyy]

@@rherydrevins well ofc. This is just a whacky project and nothing to serious

[@nickel36]

@@rherydrevins maybe, but also Alex does have an engineering degree.

[@Daniel-hj5jt]

I spent a couple of years playing with TEC's, successfully building out a universal whole case cooler that dropped the CPU temp by 20c while maintaining a case temp of around 10c. So a few things, mounting pressure on the TEC plate is EXTREMELY important, you need even pressure across both sides or performance takes a serious hit. We ended up threading out own bolts with a very high thread density, counting the turns and confirming with calipers. You also need to have a neoprene gasket (cut a hole for the TEC and sandwich between the heatsinks) we used quarter inch high density neoprene, but your application may need something different. We also used 600w TEC's (24v @ 25a) which required a special switching PSU (30v@30a), and HUGE melcor nickle plated copper heatsinks that were cooled with 120mm 120cfm sillverstone fans. The HS's were 120x120x90mm, and each weighed about 5 pounds, with each tec using TWO. You can simply drop the cold side into a container of water, and use as many as you like. The other important thing, you're much better off using high power TEC's like the 600w we used, and undervolting it. At lower power, TEC plates are much more efficient. Basically you're better off using 8 600w TEC plates, running 75w each than you are using 1 plate running full load. I would have to check my 15 year old forum posts, but i'm pretty sure we found that 30% load was the sweet spot in terms of efficiency, though i'm really not sure if that's a flat metric or simply applied to our 600w plates. Either way, i'd suggest taking another run at this, you should be able to get much better results using much fewer parts and a less janky set up.

[@heygek2769]

I think a big part of why this video even happened is because he used stuff that they already had or bought cheap off AliExpress.

[@Daniel-hj5jt]

​@@heygek2769 I'm sure it is, but they've taken a couple runs at TEC coolers for various applications, and in each instance they've done it rather poorly, ended up with bad, or at least insanely inefficient results, and perpetuate the idea that TEC's are useless. I freely admit, this is a personal pet peeve and this was clearly done for the entertainment value, but...if you're going to do something, you really should try to do it as well as you possibly can. One of the simplest things that is consistently overlooked, is using a TEC to cool the back of your CPU socket. There have actually been a few cases in recent years that have employed fans behind the motherboard tray for this purpose, using a TEC in this was is simply more beneficial, and less complicated than trying to directly cool the chip. Like i said before, i spent years playing around with TEC designs, and ended up with several very viable solutions that i simply didn't have the money to see through, and now i just don't have the time. These guys do, and i'd like to see them make a serious attempt.

[@Guru_1092]

The Jank is part of the appeal though.

[@samielamraoui7746]

@@heygek2769 sqws

[@a-nus]

some people, yanno, have a life lmao

[@zejjnt]

I absolutely love these things that us regular nerds just dream of like "this idea is dumb, I want to test this" but you guys actually get to do it :D

[@13StJimmy]

The Alex and Jake combo is pure gold definitely would love to see more of them together

[@tipturkey1283]

The kids just running wild in their dad's garage

[@Redbikemaster]

They definitely were great together

[@ALonesomeStreet]

It was chaotic and I love it

[@MrKozlosPL]

Alex, Jake & Dan are perfect trio. Alex "should be fine" frankenstein inventions are lawful evil. Jake's persona is chaotic good. & Dan is the true neutral with pinpoint accuracy reactions. I can't imagine the LTT/LMG without them.

[@HAMpeach]

It really seemed unplanned too haha love it!

[@Steamrick]

I really hope that there's a followup video where Alex fixes the worst issues with this cooling apparatus... there's soooo much room for optimization.

[@tzxazrael]

that WOULD be really cool to see if it could ever be really good at what it's supposed to do... but on the flip side, "optimized and efficient" isn't really the reason we click on these videos, is it? xD

[@CorDawgYT]

Imagine spending that much money on tools and equipment, and this is the results...

[@amagal9091]

There is a channel called "Этот Компьютер", in his playlists there is a playlist called "Пельтье", there he assembled his cooling system on peltier modules with a solution to the problems that Alex encountered(these videos are two years old)

[@onemananarchy]

I would also love to see them get the full power and tie in a GPU block to the loop.

[@ThePiprian]

Der8auer has a video where he built and tested something like this and it worked pretty well iirc.

[@Wolfesbrain]

I love all of these "technically feasible but practically inadvisable" projects. Give Alex's mad science lab a bigger budget!

[@certainlystormy]

literally the best shit on yt

[@360tomahawk_obese_gorilla87]

they should give him his own channel to do this shit

[@Angel_EU34]

"technically feasible but practically inadvisable" sounds like a mantra for engineering school xD

[@OddlyIncredible]

"Technically feasible but practically inadvisable" basically describes overclocking generally. ;-)

[@incywincy2k]

And make him wear a white lab coat

[@Nils__pltr]

I think the whole bubble trapping thing could've been solved if they mounted each row in series and not all of them in parallel but i still love the idea!

[@NeaRnotech]

i was thinking the same thing

[@venuccicze2181]

or if they mounted the reservoir at the top :)

[@hapybratt8640]

Then they'd need even higher head pressure and even more D5 pumps.

[@Nils__pltr]

@@hapybratt8640 is that a problem tho?

[@amartyamishra6961]

@@Nils__pltr yes they already using 3 :D

[@eduardocarrasco8830]

Alex, the way you connected the pumps is not giving you double the head pressure, you are basically connecting them in tandem. This mean that one pump discharges just to feed the suction tank to the next. There is not pressure transmission doing that, so basically is just the last pump working, the first is just feeding the second tank, that’s it. If you want to connect the pumps in series to double the head pressure you need to connect directly the discharge side of pump 1 to the inlet side of pump 2. If you want to double the flow, then both pumps must be connected to a discharge pipe at the same time, but the total head is equivalent to one pump.

[@Nickgowans]

Alex went from nervous engineering nerd to full on video presenter in a few short years. It's a beautiful thing to see

[@shanekhiu9884]

Just like Linus at the start, a worthy successor.

[@norkshit]

@@shanekhiu9884 Alex for LMG 2100

[@lucasmelee]

now he's a cooling mad genius and we love it

[@LautaroQ2812]

Indeed. I remember his first videos... he was paired with Riley and I believe Anthony also had some videos here and there. They both sucked. Riley was always a natural. I bet he cheated. But now Alex has found his own style and it''s fantastic.

[@malifor2210]

I remember his introduction with the laser cutter! But that's wayy early on!

[@milktaster85]

Alex doing silly cooling projects are genuinely my favorite videos on the channel, I hope we see more in the future.

[@Nepoxification]

I assume we already see as much as possible 😀 These projects take up so much time and are so damn much work to realize

[@Spoco]

Still waiting for a video where they do sub-ambient cooling without electrical worries, by sealing the whole PC in a different atmosphere without water in it. Someone needs to do it!

[@bigschnozer576]

That’s how I found out LTT

[@koalaunknown]

I would love to see a sequel to this that uses the same idea but in a more optimized way.

[@oliverwhitaker5760]

using a server 12V only server PSU, and maybe using cheap air coolers on the peltier hot side to half the effort on the cooling runs might help!

[@adoksym]

Then you should watch der8auers Video on cooling with multiple peltier elements ;)

[@cho4d]

You need a separate res at the top of the loop for this to work. pump at the bottom, res at the top, then you're not fighting gravity. come on guys this is water loops 101!

[@cho4d]

also the clamps idea was alright, but you can make mini clamps out of 2 sections of dowel and 2 wood screws. then you can make 1 adjustable clamp for each inlet and dial in the restriction perfectly!

[@NonSensicalCharacter]

I feel like in a previous video, it was established that if you want to do this, you should first run the hot water through a radiator to get the temperature down for most of the way and then run it past the TECs to go sub-ambient.

[@Princess_kitty14]

Alex was so preoccupied with whether or not he could, he didn't stop to think if he should

[@richardgarrett2792]

That thought has rarely if ever entered his mind.

[@tdgchan]

Alex was so preoccupied with whether or not he cold, he didn't stop to think if he should*

[@geekfacekillah5389]

As a future engineer, I love how overly complicated this is. As a future engineer, I hate how grossly inefficient this is.

[@Jd-zl7mn]

I second this...

[@RedRingOfDead]

As not an engineer. But knowing something about something. I 3th this Also using different hardware for the distribution would've made it more efficient

[@ImasterIIchiefI]

as a engineer i could do better xD

[@fynkozari9271]

Why do u think technology is going backwards? Higher power usage, less efficiency, high temperature 🌡️??

[@MigotRen]

As an engineer, this a aprove of this. this video kills me

[@MattyRRG]

We need more Alex and Jake, such a great duo, both of them are smart and janky at the same time

[@LunaticCharade]

Lol, smart and janky is the best description!

[@indigenous.rabbit2877]

I believe you ran the cooling to the peltiers in parallel, that would completely explain why the coolant was not getting there. Water always takes the easiest route so there was no need for it to go through the top ones, it could just go through the bottom ones. Also rethink the diameter or your water tubes, the tubes going to the waterblocks were really thick and the one going to the pumps was only a little thicker. No wonder there was almost no flow in some areas. You would probably be fine with those flimsy 5mm ish tubes going to the individual units on the hot side. Maybe for a second iteration of this split the cooling system up into groups of like 4 peltiers cooled in series with smaller separate radiators. Also have the water in the cold loop flow the other direction from that in the hot loop to make sure the water doesn't get reheated by the higher temperature peltiers (because they are in series the last one gets a lot warmer cooling water and thus will cool less far on the cold side). I think by hooking up the cold side in groups of 4 (or so) with their own pump and combining the output with a splitter to the CPU plus the aforementioned changes you could optimize this setup.

[@Dornacgove]

The only thing missing is the "What the f* are you doing and HOW MUCH DID I PAY FOR IT?" Linus cameo.

[@Nick-rs5if]

Yes! 😂

[@kanetw_]

1. Use a few distribution blocks (eg Phoenix PTFIX) instead of soldering 80 wires. Or good old Wagos. You'll hate yourself less. 2. I would do a 5s4p connection instead of 20p to save on tubing effort while having some redundancy. E: any manifold connection has potential for unequal flow so you need to watch out for that. Big benefit of series tubing is you have the same flow rate everywhere.

[@DrakkarCalethiel]

5s4p with each string on its own pump would make a whole lot more sense.

[@ShieTar_]

But that means potentially trying to remove 600W from a small 40mm x 40mm waterblock. I don't think you can get a fast enough flowrate through it to make that happen.

[@zeendaniels5809]

Add some RGB. You forgot about that.

[@todorow22]

He could tune the flow rates with flow controls. reducing flow in the lower peltier devices would probably balance the flow up to the peltier devices that are much higher and thus need more head pressure. If you are feeding the same head pressure to each row the top will never get good flow.

[@kanetw_]

@@ShieTar_ Don't underestimate the heat conductivity of water. 600W on 40x40 sounds like a lot but is extremely manageable

[@madeintexas3d442]

There's nothing that makes me happier than a video where Alex makes some crazy contraption. It is very relatable.

[@freschey]

The trio we never knew we wanted, but deserve a series of videos with: Alex, Jake, and Dan!

[@je2231]

again the scariest things an engineer can say is "it should be fine" or "it will be fine"

[@KevinDC5]

You do know you can get 40x120 aluminum water blocks so you can reduce you hose usage by a factor of nearly 4. J/s Hilarious fun build though! 🤘🏼🤘🏼

[@devkit0]

Jake and Alex in the same room is my new favorite thing. Pure nonchalant chaos.

[@Matty.Hill_87]

Dan's reaction was incredible 😂😂

[@diptarghyaghosh8526]

AbOmInAtIoN

[@Michael_mki233]

Dan has been the best addition to LMG since Anthony.

[@ICanHazRecon911]

@@Michael_mki233 he's slowly started to become my favorite LMG member for a while now lol his reaction was priceless

[@antoniosteiger9443]

A mad thumbnail for a madlad engineer. Love it

[@orangegamer3512]

definitely

[@DarkZenith]

Alex needs to long beard and long hair it up with a labcoat. Would be awesome.

[@covodex516]

these kind of videos are the most interesting you guys put out; just let Alex and the other engineers do whatever crap they come up with, its super entertaining

[@kraigmeares8286]

Lots of room for improvement on this one. Would love to see a rev 2

[@Parzivilian]

Time for my daily dose of absolute certified craziness presented by Alex.

[@Thebadbeaver9]

You need a manifold that distributes to each of the lines with a constant volume flow rate. In other words, the fluid is taking the path of least resistance, like the lower TECs and shorter tubing runs.

[@sHoRtBuSseR]

This is the right answer. Restrict the lowers, use separate pumps, or series up several of the TECs

[@lasskinn474]

just have loops for few tec's each going to a tank and a different loop from the tank to the cpu.

[@Nur__]

@@lasskinn474 makes more sense

[@milamber319]

I failed thermofuids 3 times and even I was frustrated he didn't lift the red above the techs

[@scarletspidernz]

I played too much factorio/satisfactory to know this 🤣

[@QueenSaffryn]

It's that time again, janky water cooling with Alex, I love it, these are my favorite videos LTT makes, and I hope the series never ends :)

[@c4sualcycl0ps48]

It’s great that they always happen at the onset of the new generation. Then legit coolers come out, then the next generation changes it up again and the cycle repeats

[@JETWTF]

For a manifolded assembly like that you want it to be horizontal rather than vertical so gravity affects each one the same. Then you can have radiators attached to the hot side drawing cool air from the cold tubes on the bottom and the cold side blowing chilled air over the hot tubes on top for a small performance boost in the setup.

[@vdoxsamp7283]

0:43 oh-oh, watch me **Double-tap**

[@broklond]

You gotta connect those blocks on the peltier-s in parallel (at least in blocks). You could do four groups of TEC-s with each group having their own pump and radiator combo so you have higher crossection for the water to flow through. If you connected everything here in series, I would imagine, the pressure needed to push the coolant through the whole system is too much with just a tubes diameter of cross section for coolant flow.

[@TorgieMadison]

As I understood it, they were connected in two parallel blocks of 10. The frame's left side supported 10 TEC-s, and the right supported the other 10. Front was cold, back was hot. Am I missing something? These aren't connected in series at all.

[@LievenSerge]

@@TorgieMadison They all had their own circuit, which makes for a very long pipe in sum. When you group 4, you almost cut that length by /4 -> less pressure is needed.

[@VealCalf1]

I mean, yeah. But if you do that and lay the frame down so that you don't need the pumps to lift the coolant 3 feet it would work a whole lot better.

[@LievenSerge]

@@VealCalf1 If you make yourself familiar with these particular physics you will learn that the relation of pressure needed to length of the pipe is not linear. Spreading out the pumps to different positions in the circuit could help with that.

[@yenchenje4611]

I've never gotten cracked up by these sentence but when Dan came up to them and said "What the fuck is this abomination?", "What are you cooling?" and "What are you heating with this?" all at the same time I audibly laughed

[@MrOnosa]

Dan's great

[@CykoruKun]

I never watercooled or overclocked anything in my life and Alex' videos about this stuff are just fascinating, love it!

[@rodrigocunha34]

You should connect the blocks in series. So you solve the pressure problem and equalize blocks temps.

[@Wrenchmonkey1]

Agreed. Would've made it really easy to bleed the whole system

[@sharpfang]

Hot side in series would only make most of them non-functional as they'd be "cooled" with hot water (heated by earlier ones). OTOH the "cold side" in series would freeze the antifreeze, as the cooling effects would keep stacking.

[@sharpfang]

@@muffinconsumer4106 Would require a lot of smaller radiators, couldn't use these big liquid cooling radiators they did.

[@ManhwaMystics]

Alex must be having the time of his life because we all know weird ideas pop into our heads but everyone get the chance to implement them.

[@murdock9876543]

I did the same but in smaller dimensions (about 400W). I wasn't happy with the results. So i tried the outdoor mod. Placing my 9x120mm radiator outdoors at about negativ 5 degrees celsius improved the result greatly. The cool side of the peltier element was extremely cooled and the cold side could get insanely cold (not gonna spoiler, try it out its crazy!!!. Its easy to realise If mother nature provides you with the right circumstances. Shouldnt be a problem in Canada i guess. I would love to see you stepping the project up with the "oudoor mod". Sorry for my terrible english and greetings from Austria

[@nkl7345]

Austrians and their cooling solutions smh

[@JamieMoller]

I SEE IT. He has the engineer eyes now. You know, the sort of sunken, passion deprived gaze that is earned by answering emails and attending team meetings instead of doing ACTUAL work. Congratulations.

[@Dukes3677]

Jake getting sprayed after asking if he can just crack it real quick had me cackling

[@SoniasWay]

I love how positive Alex’s energy is

[@moRaaOTAKU]

He loves cooling of course he's a chill dude

[@Syphious64]

I used to have the "Ultra" brand peltier tower air cooler hybrid. It actually worked very well. With how it was set up it kept the CPU at one temperature when under load, didn't cool it too much or too little. Gimmicky, yeah. But it was cool as hell and still did a fairly good job. Not the best, but good. This idea takes that to the max. I like these ideas lol

[@ColeRees]

I can’t believe you guys are doing ANOTHER peltier cooler video right as I’m designing a stupidly crazy design for a giant observatory telescope chilling system. So thankful!!

[@Running_Wakko]

Please don't use Alex as a starting point. He is making so many stupid mistakes. Main stupid thing was that he did not place the header tank on the top of the loop.

[@ColeRees]

@@Running_Wakko don’t worry, we aren’t using this is a guide! Our system is going to be far more complex as it has to work in all orientations. The water blocks will be changing orientation as the telescope mirror moves around, so we have to account for everything. We’re gonna build a working model before we even try out the real thing.

[@elisdee1]

Alex is by far becoming my fave LTT member

[@firefox7530]

You have to create strings and parallel streams with your cooling liquid. The way have it now you would need an open reservoir which presents NO pressure at all. Best way to to this would be to have the water coming from top into the reservoir like a small waterfall. With that much parallel water flow you actually hampered the whole performance. Also add some automatic air reliefs at the top to get the air out as fast as possible. We have the same concept in out town water system where I'm responsible of. You need strings and parallel flow correctly done or else you have no flow at all...

[@ViliamF.]

We are slowly getting to a point, where our CPU coolers will need their own coolers.

[@Exilir8]

@Ahmed Jones but If we get a cooler for the CPU cooler's cooler, then we'd also need another cooler for the cooler for the CPU cooler's cooler.

[@Jake12220]

Stuff like this is why I'm subscribed. By far my favourite clip from LTT in ages. Just a pity Linus wasn't there to drop it.

[@JacksonAcademy1]

16:06: I like how they black out the password, like anyone wants to break into their warehouse, ignore all the expensive equipment, and take a motherboard covered in vasoline 🙄

[@Acssnipa]

Thank you Thank you Thank you LTT, 1 wk ago it was so close to buy the 1/10th of your test parts on Aliexpress, still try to convince myself, then you did it for me, saved he heaps effort, and made my mind to keep standard water cooling. thank you again...

[@ulrichkalber9039]

i think you might get better results if you use a large high reservoir above each loop and let the pumps just pump the liquids up, then let gravity let the liquids flow through the coolers this would probably get equal flow through each cooling element. that way you could also store some cold liquid in the reservoir and run a benchmark from the stored cooling capacity of the reservoir.

[@joelfrom08]

Alex's introduction to tecs and cables has probably taught me more than the 8 years of physics class I had so far

[@justinpierce3367]

what?

[@thejo6331]

I'm here for more of Alex's off-the-wall cooling ideas! As in, he comes up with the ideas by "throwing shit at the wall to see what sticks", then makes videos out of what does /not/ stick.

[@ral-xk7qb]

12:14 "The D5 pump loosener has escaped prison and the police are on hunt to find him!"

[@Raikos100]

Alex is the best learning source of how to do water cooling, by pointing out ALL of the "don't do this" examples. A true master of his own craft.

[@MD2389]

Honestly, I love these types of videos, even if the result doesn't exactly pan out! Sometimes you get a wild and crazy result, and we all benefit by learning!

[@Zephyruxs]

alex is easily my favorite person to see leading a project

[@cjwrench07]

I love these engineering videos. Please keep them going in any way you can.

[@AKOsiMORRIS]

from how I understand piping in general (I am not an expert) the reason there is so much air trapped is because they don't have any pressure release valve located on the highest point of the loop so the air just gets trapped on whichever place gets the water flow last... it's basically a one-way valve that traps liquid below it while release any air upwards without giving it a chance to get back into the loop (I think the show The Good Doctor made a decent demonstration of this)

[@AgentDrake]

Every time Alex says something to the lengths of "It's fine." / "It's gonna be fine." / "It should be fine." I know it's going to be a good video.

[@KuramaKitsune1]

Should have had those tec modules in series and parallel behind each other cooling the hot side of the other tecs for a multi-stage

[@YOEL_44]

Only time I've used a peltier was for a DIY dehumidifier, they're terribly ineficient, just don't use them.

[@RTDragonCommando]

I think the pumps needed to be split up among the different sets of coolers, so a pump and a "one in five out" manifold per level of that tower. Getting the water/coolant to cycle properly through all the blocks would probably make a huge difference, and if I understand how they work correctly, may actually get the TECs to draw more power. The reason for that being they have temperature limits on the hot side, once it reaches a certain point it just can't push more heat across, and will drop off.

[@deidyomega]

Those tecs need 17v, they were giving them 12v. So the devices were underpowered, thus under delivering.

[@Nate_the_Nobody]

14:30 Thank you for such a selfless sacrifice to bring us such precise scientific data

[@davidpretorius2984]

This whole video feels like 2 kids got left unsupervised with dad's tools over a school holiday. I love it

[@luigigaminglp]

Alex, Jake and AliExpress in one Video. And its exactly as insane as expected!

[@kol101101]

This is absolutely insane and im so glad you guys made it. 9:21 best part

[@VRtechman]

These guys could never be plumpers! Or anything else than KZbinrs! 😏

[@Frightenerd]

9:26 I bet Lulu wants a taste then

[@upholsteredhero5216]

The way you do this is to buy larger water blocks. You can get blocks that are longer so that you can attach 4x or even 8x pet's per block. The correct way to do it is to add a pet inline wired up to an inverted furnace thermostate so that you can temp controle power on and off the pet's. Best way to go sub ambiant is with geo thermal heat sinking though. Your coolant should stay a constant inline temp between 10-15 degrees. Heres is another hint people condensation requires a temp differential based on humidity in the air. So if your pc was in an airtight humidity controlled enviroment like a mineral oil case or a freezer you can eliminate the opertunity for condensation to occur.

[@justsomeperson5110]

This looks like a brain from a bad sci-fi movie from decades ago. It's lovely! So when do you design a case that the wonko cooler mounts to and call it "The Brain That Lives!" and make your own mini movie for Floatplane?

[@crazzywolfie]

i think you should try improving this. you should mount the pump/reservoir up high to prevent air lock and pressure issues if you want to keep testing the in parallel like you are. i would recommend each row of coolers in series and then have the rows connected in parallel. it would really force the coolant to circulate through the coolers and likely require less force and make the water much cooler.

[@amiryousefi5374]

actually u just write my toughts 😅😅😅

[@tobiasjames6949]

Exactly, never understood why most liquid cooling setups in typical computers have the res down lower either, should be the highest point - even higher than the rad - makes it much easier and would automatically deaerate

[@nathantron]

I really was hoping they'd go all out and like machine a whole water block manifold for the in side and outside. I would love to see a rig they make that actually has some bananas cooling and could be used later on for other experiments. Kinda like their air conditioner cooler.

[@StatikGaming]

POV: You have the Linus budget and a crazy idea. But it somehow works at the end.

[@miha493]

I like how Alex be like "Linus, we are really need all of these several thousands of dollars CNC's" and his actual projects be like "clamps, duct tape and blessings of Gork and Mork ".

[@otakuotaku6774]

I think with the new AMD cpu and Nvidia gpu all the time the user will be thinking about the Electricity bill

[@richardgarrett2792]

'Borrowing' from a friend.

[@michalsnaiberg2734]

then again, you wouldn't need heating at all during winter, so the expenses might cancel out

[@pseudocode6506]

Exposed wiring, lots of water everywhere. Loving it.

[@chrols1]

love alex's strange, wierd and amazing cooling ideas! best one yet!

[@Its_Onion]

Guys need to get the thermo coolers on the back of plate/heatpipe and only turn it on at like 60% load for short bursts

[@frankvanrijn964]

Alex and Jake are a funny team doing Frankensteiny stuff. More please!

[@ojirmr]

Alex is the mad scientist of LMG 😂

[@Timi7007]

Alex, Jake and Dan doing mad science cooling. Love it!

[@matthewfaithfull1893]

I built one of these for real and fitted it in a case last year. 380W and 46900 in CB23, 3970X 6900XT, 7 TECs, 3000W of PSU.

[@kylepawlaczyk6293]

It is not just a pressure issue, it is a flow issue too! You need to assess the temperature drop of the coolers and then use Q = M.C.DT to work out the total flow required.... then assess the flow of the pumps against the head pressure of the assembly.....

[@jessery475]

Peak Alex. Best addition to the team. Been watching since the days of just Linus and luke and having Alex onboard feels like a breath of fresh air.

[@seanyem]

Bloody fantastic! Alex has the best and craziest idea's, the things we have all thought of doing but would never do, But he pulls them off. Love it

[@costafilh0]

Parallel was a bad Idea! You also need a LOT of quick disconnects for easy maintainance on every project!

[@RabterPlaying]

You need to put the pumps in parallel to get a higher flow rate. You dont need more pressure you need a high flow rate to feed all the tubes. Since there are so many tubes in parallel the pressure is instantly dropping (because of the low flow rate) thus not reaching the top. What also would help is mounting the pumps on the top so the pump is higher than the rack

[@Neoxon619]

Jeez, & I thought the RTX 4090 was a power guzzler.

[@ShieTar_]

Don't you have a pretty well-equipped workshop with a CNC? Don't you think making yourself a nice channelplate from a copper (or aluminium) block might have ended up being easier than assembling 40 of this tiny waterblocks? And also probably add less flow-resistance to you water-loop? Also, much less problems with the massive height-differences? Also putting the full voltage on the TECs might not be the bestest Idea, once the hot side loop isn't capable at staying near ambient temperatures anymore, the cold side is still going to give you a temperature difference, but now it's only relative to the luke-warm water on the hot side. And 1400W on the (maybe) 100 l/h you get from a D5 means: 1400W / 4.2 J/g/K / (100 kg / 3600 s) => at least 12K heat-up per cycle, not sure at which temperature your radiators will manage to remove 12K per cycle? By the way, if the TEC is specified to a maximum heat transfer of 120W, than this is the heat it can take from the cool side, at 0K temperature difference. While being operated at maximum specified current, and usually at a very low efficiency. Which means 120W is by no means the maximum of heat it can offer at the hot side, that is more likely to end up between 360W and 600W. So with your 3kW of PSU-power, you wouldn't have been remotely on the safe side if you had given them their maximum voltage. But for a small TEC that want's to move 120W this voltage is probably above 12V anyways, right? All I'm really trying to say: There is a way to build an effective, and reasonably efficient, chiller from 20 TECs with 120W peak capacity each. But there is also a way to just yolo it for a funny video ...

[@BenQuigley]

I was thinking the same thing

[@macking104]

but that is too logical and not humorous…

[@volkdude8543]

I had Two suggestions, to save you time and it is cheap Alex, Thread sealant paste is very inert works better then Teflon tape. I used it a lot to test 3-15lb and 4-28lb pneumatic actuators, pressure transmitters monometers for an old big boiler. My other suggestion is from when I worked for an electronic tool co is "haisstronica Heat Shrink Butt Connectors". These Connectors are Used with a heat gun and leave a marine grade electrical finish. They are fast and fairly cheap, heat guns are faster then soldering. you can also line them up and hit several at once. Good video, pumps go high in industrial loops unless it is hydraulic whole setup might cost $100 but for 50 threads its about 1/2 the time. I'm not sure what Alex gets paid but my guess is it is cost effective

[@johnkester7597]

Guys, put your sub zero test rigs in a nitrogen or argon flooded container. No more worries for condensation. It doesn't even have to be closed so long as there is constant directed flow. The container doesn't have to be anything special. Cardboard, plastic bin, or a fish tank would be more than enough.

[@cdgames69]

I love how whoever was in charge of subtitles just called Jake "Assistant"

[@XTJ7]

At this point Alex is just living out his wildest cooling dreams. I feel he probably left instructions that, in the event of his death during one of these LTT projects, there will be an engraving "worth it" on his tombstone. In all seriousness though: while we enjoy all the messing around, please stay safe dude!

[@edenrose2374]

@LTT - Alex, there is one-way air bleeding valves. if you attached it to the top of your return distribution block, you could bleed it without issue. Also, that antifreeze should of been thinned, it was killing your pump performance.

[@MuzahirAli1]

We don't often see Alex and Jake together in a video. But when we do, it's super exciting.

[@KGBgringo]

This was great, we need more Alex and Jake making amazing jank

[@mattsnyder4754]

Alex in the writers’ meeting. “Ok guys. I have another idea.” “Is it another crazy cooling idea?” “It’s another crazy cooling idea. But this one…” “Lemme guess. Parts from Ali Express?” “…yes.”

[@Freek1989]

Alex, Jake and Dan should have their own series, period