Cooling my RTX 4090 with the Smallest Radiator I could find

[@nikonissinen6772]

now you need to watercool your fan controller too.

[@Simon_Denmark]

Could have at least aircooled the fan controller.

[@Vatharian]

There are water blocks for Aquacomputer Aquaero 5 and 6 and its fan relays. Heck, at some there were waterblocks for DDC pump electronics....

[@arcadealchemist]

Solid state cooling soon

[@yensteel]

Feedback loop hehe

[@strelatronics5533]

Never going to happen​@@arcadealchemist

[@FluxMarsh333]

Quick, someone confiscate Roman's Dremel before he really does go too far!

[@livadaruadrian9104]

😅😂😅😂

[@viperpit-k5j]

No worries he has a hammer and tape to fix anything.

[@WouterVerbruggen]

You cant; he's German so precision engineering tools are in his blood!

[@Stormpriest]

😅

[@Andersonairchris]

I was hoping he would upgrade to a sawzall

[@MrPruske]

11:34 with all that airflow, you could have reversed the flow of air through the radiator and had it blowing across your fan controller board, and probably the tubing and motherboard for even more cooling XD

[@fanlessfurmark]

Yes, fan controller and power source should be in air path

[@der8auer-en]

yea next step would be to have a custom block for the fan controller xD

[@ranjitmandal1612]

😂

[@mikezappulla4092]

@@der8auer-enI was thinking that while you were talking about how hot it was.

[@PainterVierax]

@@der8auer-en isn't it possible to just stick some rads on top of the chips? I mean it's still quite common to see rads on transistors, controllers or SoCs to improve dissipation. Here it seems the controller had some over temp protection but a custom PCB with high current rated TO-220 mosfets screwed on a rad can easily handle switching a 7-10A load.

[@kkpdk]

I know those fans. I used to babysit half a rack of 1U servers, where each of them had 6 of these at 100%. It was a safety hazard.

[@war4peace1979]

I own 32.500 RPM as well as 38K RPM fans for my 3D printers.

[@phuzz00]

I was playing around with a 60mm Delta, which was strong enough to make into a mini hovercraft (made out of a sheet of cardboard, and a plastic bag as the skirt), but I accidentally got my finger too close and it chopped down to the bone :( Also broke the fan blade :(

[@HaxR3]

No joke, the tip speed of the blades on the 21000RPM side are travelling at 300kph and can do some serious damage to fingertips.

[@HaxR3]

@@phuzz00 Ouch, I've had a couple of deep cuts from 92mms where the grille leaves a "wide enough to be dangerous" gap around the edge but nothing that bad. I think so at least, I immediately superglued the wounds shut so I'm not sure how far it actually went!

[@volvo09]

​@@phuzz00 was it the model with aluminum fan blades? Those look brutal if you ever stuffed a finger in there by accident.

[@arielr9614]

The fans will work fine, hard wired. There is no need for a PWN controller. Also, you were running those fans unrestricted through a free-flowing radiator. There is a lot of air moving, but what end up happeneing is that air at the surfaces of the fins become sort of a "Hot Coating" that lubricate the "Good Cold Air" directly out. Those highspeed fans need to be presnted with a restriction system on the back side to increase the prissure in the radiator, causing the air to compres more and force the hot layer to interact with the cool layer. This is a nice experiment, just not on an expensive GPU like that. Dust off a heat-hog and give it another go. With back pressure baffles. This is the reason rack servers have so many baffles and relatively small openings for cooling. It's more about pressure management than CFM. I wish KZbin allowed the poasting of diagrams and pics as a response. So you can see the phenomenon I am talking about. Those fans create a high static pressure in the enclosure, causing lots of mixing, then smaller vent slits let "some" of the air out.

[@AddyEspresso]

you are a genius

[@ezg8448]

Yeah, it'll work, but you heard how loud those suckers were. The inside fans run at 70,000 rpms and will run at that speed constantly.

[@theRPGmaster]

I have a 3000 RPM exhaust fan in my system. There's gaps around it, so I tried covering them with electrical tape, to reduce recirculation. After a few hours the fan had blown the tape off the back, even though it wasn't in the path of the fan. The tape didn't overlap the fan at all. That just shows the huge pressure differentials these fans can create.

[@Sabrinahuskydog]

You can create a diagram and upload it to imgur then post a direct imgur link in the youtube comment to link to your diagram. I've done that before and it's allowed.

[@johnnyeskimo]

I would like to learn more about this. Do you have any video sources discussing it further? I've worked with servers randomly for many years, and was always surprised how restrictive the air flow is.

[@BeefIngot]

Kinda crazy how good noise suppression has gotten passively for everything. That thing must have been deafening, like hearing protection levels but on the mic speaking comes through clearly. 15 years ago nothing would make it through.

[@jurakerleha]

I assume that these 4 fans plugged probably tripped OCP protection on PSU, not sure what their starting amps are for fans, I tripped few times OCP protection on Aquaero and Quadro Fan controllers with few fans That's what we like from you Roman, crazy things who nobody does, awesome video mate

[@anubhavmuku96]

Yea! I have done that on server boards with those Blowiemetron delta fans too! They blow a lot, but it doesnt really gain much in terms of thermals wrt the cost or the difficulty of installation. Edit -> I ended up making a separate fan control board with a separate SMPS using the RP2040 to control the ramps from the mobo commands. Waste of money, it was.

[@Rockport1911]

When you have a watercooled 4090 but also absolutely need the airplane sounds for immersion in MS FlightSimulator :)

[@DarkAttack14]

now time to link fan speed to throttle in the game. "I cannot stop or my card will nuke itself I must fly"

[@Vladek16]

12:38 the 60°C water is also not viable for long period of time because this is the max operating temperature of D5 and DDC pumps

[@Adamgreen735]

Yeaah i always thought my ICUE AiO was hot at 35c and was always turning the fans up to cool the water more.... Now i know it will be okay at 35c.../

[@ms3862]

@@Adamgreen735closed loops are designed to handle higher water temps - 35c is more than fine. But 60c water in customer loop is asking for trouble, it can damage the tubes and kill the pump

[@coalhuman3803]

RTX 4090: *93°C memory* My laptop's memory is laughing in the lava: 103°C in a stress test, I had to make custom cooling.

[@bartman2395]

u forgot about your (and mine) 13(4)980hx at 95 all the time.

[@butters2160]

My razer blade 16 with only a 4070 reaches 110 and that is 100% normal which is fucking mad

[@bartman2395]

@@butters2160 tbh it starts to throttle down at 95, at max fan I can keep it below in benchmarks or at 95:)

[@HDRGamingHub]

I get maximum 80 C on memory with my Asus TUF 4090 . I don`t understand how is he getting 93 with water cooling.

[@bartman2395]

@@HDRGamingHub I thought we are talking about 4090 mobile lol.

[@FerrumMaster]

Next time time for fun, use fan cone or cylinder. I had my share of cooling projectors and lasers, there is a huge dead zone in the middle, basically you left your center radiator fins air starved, it is proven until you hit equilibrium.

[@abalanceddiet]

9:32 5090 😳

[@reubenabela3063]

freudian slip

[@devilzuser0050]

[@howabout2138]

bro, ALL WE WANT TO SEE is weird stupid things like that, we don't care about some motherboard reviews xD

[@der8auer-en]

hahaha

[@Matt-oq4jq]

I feel like when Roman talks about something, that means it’s worth considering in terms of technology. Not like he’s a puff piece sort of guy, right? Silly weird artifacts nonwithstanding, he’s a real source of good information

[@FreakyAngelus]

Have to agree... While I deeply enjoy those deep technical reviews where Der Bauer shows his dedication to getting all the science right.... NEVER stop with these kind of fun things... Just to prove people wrong ;) It's almost like those radial fan blowers we used to have on GPU's.... were not the most stupid idea ever!

[@howabout2138]

@@FreakyAngelus that's what I kinda meant, yeah, those technical videos are awesome, but kinda everybody is doing them, on the other hand, those "experiments" are way more entertaining, you can't find many channels doing it on youtube, old LTT was perfect place for it but they stopped them, everybody is like "I'm not cOmFoRtAbLe WiTh 4090 RuNnInG oN 360 rad" meanwhile derbauer is like "hello, in this video we will try to cool 4090 with 40mmx2 radiator" xD

[@ranjitmandal1612]

💀

[@benmadelaine]

Hello Roman, maybe what happened is when you tried to add two more fans, those additionnal fans were producing current (turning the fans in a wind turbine) and that current going back to the controller may have fried one of the main component of your fan controller. Stil happy to see those experiments. Cheers.

[@chieftron]

Great observation!

[@XciterD]

A trick I use when filling the loop is to use boiling hot distilled water, heated in the microwave in a pyrex beaker to avoid contamination. It gets the air out quickly as the air volume shrinks massively when cooled, plus the water is now sterile so as long as the loop remains sealed it shouldn't need a biocide additive! No guarantees but it works amazingly well for me! I always do a double flush of a new loop as well, to be sure there is no crap in it.

[@wahidtrynaheghugh260]

Going push-pull with counter-rotating fans on a 12 FPI radiator is so hilariously overkill, you’ve got enough pressure to lift a car. Need a ridiculously dense radiator.

[@f688xt6]

I love these kind of "mad scientist" videos. They are very entertaining! Thanks Roman!

[@neville_bloody_bartos]

Experiments like this are stupid, impractical and a waste of everyones time. I love it, more of this sort of thing please.

[@Macheako]

*no air planes were harmed in the making of this video* ✈️

[@crazyfurnaceguy1229]

The PWM signal should be used to directly control the fan instead of adjusting the voltage and current from the fan's power input.

[@TankR]

There is some weird greek letter based math that can calculate a decent prediction of inlet/outlet temp based on the thermal conductivity and specific heat of the aluminum, coolant, area of the radiator fins, and the air flow over them. IIRC, there is a counter intuitive relationship with air dwell time in contact with the heatsink, air can move too fast past a heat sink to pick up as much energy as it could. That being said....when you're cramming cubic meters of air across 80x40mm of zigzag metal, that relationship falls to the good ole American proverb "effectiveness by volume". Usually its used by artillery, bit the sentiment is the same 😆 Sidenote: I was just looking at these kinds of fans for a side project unrelated to PC hardware and cooling. So big thumbs up for incidentally covering something I wanted to see a live demo of! 😎👍

[@Wasmachineman]

Delta-T?

[@yensteel]

ϵ or σ? Emissivity and Stefan-Boltzmann constant. Or ΔT

[@diaman_d]

Lambda

[@snjert8406]

As a Delta Electronics fangirl(and fan nerd), I loved this hahaha Now you only need to put the fan controller into the airflow and it won't overheat :D

[@NegativeROG]

This is awesome, impractical, and exactly why I love this channel. 👍👍👍 Considering the hi-perf fans that rad will use, I am absolutely shocked at the sparse tube/fin density. I would expect with such powerful fans that you could barely see light through the stack.

[@poorplayer9249]

If Roman smiling that smile and holding up a Dremel isn't a meme, it ought to be. 😂🤣

[@AhmedKamilSyed]

These are server radiators, and Alphacool also offers water-cooled server chassis that you can install these in. In my homelab, I have two 2U chassis, which significantly help in reducing noise compared to air-cooled servers.

[@diaman_d]

A dB measurement would have been fascinating. Still stunning to see such a tiny solution is workable for those niche situations.

[@volvo09]

Nice and quiet, that's all you need to know 😂 From the time I've spent in data centers you have to raise your voice when you are around those little fans at full tilt, they are so loud!

[@WilhelmvonFahrvergnugen]

6:02 looks/sounds like RC F-15C with twin 90mm EDFs at full crank...

[@rem_0]

Quality content and precise tests are really cool and all, but sometimes people just need some funny video for goofy questions answered and im glad you're doing just that 😂

[@pavelgorlachuk1460]

Proper way to attribute heat dissipation properties is so-called "thermal resistance". It can make an abstraction of elements in the cooling loop, starting with the heat source and all the way to the fans.

[@-szega]

That's a linear approximation for non-linear heat transfer, and for a radiator it also depends on water flow (and air flow, ofcourse).

[@pavelgorlachuk1460]

@@-szega your point? I only pointed towards Navier-Stokes equation elements where all those resistances can be presented as a sum

[@satibel]

I've had a Mobo that did do 3A each on 2 fan connectors, I ran 2.7A fans on it. The magic of the pwm on fans is that you can just pipe a trace directly from the 12V connector, the pwm itself is done on the fan, so the controller shouldn't get warm unless it's actually doing dc speed control.

[@Warning56kb]

You can usually guess if a push/pull will make a large change. If it's a thinner rad or has wide fin spacing, there's not much resistance at all and adding extra fans won't produce a considerable change, if any at all. If it's a beefier rad with a thick core or tight fin spacing, push/pull can have an impact.

[@Ramog1000]

12:05 I mean you could use a splitter cable, you don't need to power the fans with the fancontroller you could just get the PWM signal (if they are even PWM fans) and power the fans themselfs straight from the psu.

[@robertmoore119]

That was a really interesting experiment! One probably wouldn't expect a radiator that small to work with that much wattage. It is far too loud outside of a server room, but it does work.

[@DonnyDonnMendoza]

Roman is ready to send that radiator to supersonic speeds with those fans! Very interesting tests!

[@mrctuned2844]

This was an awesome video, I love taking things to the extreme just to find out where physics limit us. Thanks Roman!

[@teardowndan5364]

Having some stators on the back of the front fans might help shove more air through the heatsink by redirecting the swirling coming out of the fan into the fins and eliminating the relatively dead spot directly behind the fan hub.

[@jeremylindemann5117]

At 9:35 he says "..you can cool a 5090 this way..". For a moment I thought this was an early release of the 5000 series.

[@ford24680]

I love experiments like this! They're wacky, and maybe aren't directly applicable, but hey, now I know that it's possible to cool 300w with minimal space in a server chassis if I ever needed to.

[@jjann54321]

When Roman first powered those fans on I was reminded of the time my buddy had his switch go out at his house and as a joke I brought over an old Cisco 3750X. When I powered it on and it started screaming during the fan(s) power cycle test he just about lost it. I said "what, its fine, it works great." People have no idea how loud a datacenter can be.

[@Hostilenemy]

Actually, there is a smaller double 40mm radiator with barbs permanently attached that I bought almost 15 years ago. It is only 25mms thick. I still have it and never used it, for obvious reasons :D.

[@fermitupoupon1754]

it'd be perfect to cool a single SSD.

[@Hostilenemy]

@fermitupoupon1754 Yes, let's put a full loop together to just cool an SSD, or better yet, use it in an already built loop and cause massive flow restrictions :D.

[@fermitupoupon1754]

@@Hostilenemy you're right, better put 2 DDCs in series to cool that SSD. That should be sufficient to overcome the restrictions in the loop.

[@ThisGuy-kk1lp]

Good luck on getting your part. I ordered my parts from watercool a couple weeks ago last year and my parts we to delivered on the first of the month and they haven’t even shipped yet.

[@Those_Weirdos]

Those 40mm fans are absolute beasts, not the least bit surprising some cheap un-heatsinked controller wants to cry when trying to power them.

[@jaimemiller7630]

This reminds me of the time I used a Vantec Tornado on a Swiftech MCX4000 cooler without a fan controller. Thanks Roman for the flashback with that fan noise

[@JustCynical]

9:34 HAHAH! the fans are so damn loud and deafening, he calls the 4090 a 5090. (or maybe he's just excited)

[@simocity99]

he's probably already testing the 5090, so hence the confusion

[@JustCynical]

@@simocity99 idk about that, the cards have not even been announced. Once they are announced thez will be sent out to reviewers. Edit: “they”

[@yensteel]

There's so much news about the TDP and TGP of the 5090 it's understandable if it's a Freudian slip.

[@hariranormal5584]

Those fans are, but I'm getting used to them slowly, they just call "servers" so much!

[@antonvillalta9205]

As soon as I heard delta I knew where this was going. I was not disappointed. Keep up the antics.

[@n.shiina8798]

weird to see a fan controller overheat. i think this fan controller did not use PWM signal but an adjustable buck converter?

[@BushidoBrownSama]

Has to be

[@ryananderson9905]

Some of the HPE servers at my workplace have fans that pull over 40w. IIRC the doublestack fans pull 60w... And theres 6 of them in a server. The noise and air movement is something to behold

[@naptastic]

Please use hearing protection around those fans. The sound they make is more than loud. It is not bandlimited. It contains energy at extreme frequencies. The energy in a wave is equal to its amplitude times the square of its frequency. Loud sounds will make your ears ring, high sounds will make your ears ring, loud high sounds will destroy your hearing!

[@Leonin0]

A fan usually has a 4pin connector, +12V, gnd, pwm and a feedback of the rpm You could cut the 12v and gnd wires and hook them up directly to the psu and plug the 4pin connector directly into the motherboard With this you can control any pwm fans without frying your mb

[@MrDvneil]

just at the beginning of the video i know there is limitation of how much a powerful fan can extract as heat from a radiator, the limit is the conductivity between the water inside and the copper of the radiator. it takes time to move the heat and spread through the surface of that radiator, no matter how fast the fans are. you can increase that speed by just increasing the surface. the same happens with the am5 IHS small and thick, creating a "jam" in the heat transfer.

[@silahtnat]

Thanks for the chuckle. this was great content.😁

[@hagen.360]

This is what KZbin was made for! At least what I always wanted to be.... I just love such wired ideas that are professionally executed.

[@Ramog1000]

2:18 finally somebody says it the standard curves in an AIO are set sooo agressive often that it isn't really much more quite, but if you allow the water temp to get hotter you can mentain said tempreture easier because the same radiator will dissipate much more energy. Ofc it will not cool the cpu to the lowest temp anymore but that is fine. Turned my rig from being pretty loud whenever I fired up a game thats semi hardware intensive to staying at a comfortable noiselevel just by raising the watertemperture (about 20 degrees I think funnily enough, the stock settings of the corsair radiator are really quite agressive, I made sure to stay in the specs as to not risk damage to the tubing and pump tho)

[@EIGAtech]

This is so ridiculous. Love it!

[@N0N0111]

3:38 18Watt fan. 5:39 20Watt fan controller per channel. Flying a bit close to the sun @der8auer Fan controllers for PC are always under build, even if it says 20Watt on the sticker. I would say anything drawing above 10Watt should have heatsinks on components that do the heavy lifting AKA get the most hot. A thumb rule of mine is always go for the 50% load approach, so you have headroom for power spikes and thermal headroom. So If you would need 20Watt then get a 40Watt power supply.

[@HaxR3]

The reason the clearance doesn't fit a socket head bolt, is because it's intended that you use hex head bolts or install the nut on that side. The fan body is then able to act as one side of a hex socket when tightening it down. In extremely cramped situations you can simply push the hex head against the fan with your thumb, if you can't get a spanner into that spot.

[@xilix]

What's funny is these little thickbois can handle just as much of not more than a generic thinner radiator 2-3x their size. I got an EK240 AIO a couple years ago and I was sorely disappointed by the radiator and promptly replaced it with a thick 240 from my old loop and the difference was significant. It's the first and the last time I'll ever buy an AIO.

[@ruikazane5123]

Now THIS is content. I have not played with counter-rotating fans, but the ones we did were powerful on their own. San Ace baby! If you can try their 120mm that runs at 24 volts (9HV1248P1G?) You should be using PWM control with the fans, not the usual CPU 2-pin or 3-pin (2 pin with RPM) voltage control. That way you would not burn up fan controllers, the fans themselves have control. Or if you did it this way...fan power should be straight +12 and negative, no PWM. OR - is it a Delta fan thing, my Delta blower has weird PWM control and didnt really work with my homemade controller, unlike the San Ace style (PWM wire: ground for minimum speed, open for maximum speed, PWM to vary the speed) which worked fine. Hope you can test it!

[@orrygel]

“We’ll say goodbye to my ears and I’m sorry you have to suff(turns fans way up) OH MY GOD!” 😂

[@jerrywatson1958]

Nince idea Roman. I would have used the Aquacomputer fan controllers, like the aquaero with the water cooling backplate for 30W per channel from the built in fan controllers( I have the air cooled backplate). It will also expand with their other single 30W adaptors. I use one channel for my D5 pump and the other 3 as fan controllers. Six fans on my MORA 360 and the other six are run off the pump's fan controller. I've got temp sensors on every connection in my loop. Aquasuite is a good app but a memory hog, that still requires HWINFO64 for full functionality. My 1st one from 2017 is still on the job. I expect long lived devices. It's not cheap but it's programmable with a mono lcd screen that has past the test of time. It is still very readable across the entire screen with no burn in. Although from day one I've only used the lowest brightness settings for everyday use. Only when I access the controller directly via remote or the touch buttons does it light to full brightness, no burnt out pixels but I do have a little pixel dimming on low brightness, not noticeable unless you stare at the screen for the full cycle of displays. I've got a second one that I was going to use on the MORA 360 as a stand alone but I've got extensions from the one in my pc. So it sits as a "Hot Spare". Do you really need a color lcd screen that burns out in a year or two or a oled that may suffer burn in? I can see why after 7 years of constant use (it displays time and date when the pc is off) they made their choice of display tech to use.

[@jvmbatista]

Is it just me or those rads could have a denser fin array when matched with those fans? 2 of those probably good enough for a 4090 and 4 for a whole system. That would be a good, why not video xD

[@WayStedYou]

Yeah but i guess they assume most people arent mounting 21k rpm fans to it

[@PainterVierax]

@@WayStedYou I don't believe so. Such 40mm form factor are used in servers only. And even thinner ones are very good at static pressure so the fins could have easily been twice the density without an issue.

[@enthuscimandiri1640]

@@WayStedYou radiator that size could be end up in server, so i dont think alphacool didnt think user not slap a mega rpm fans

[@seanv5306]

Now to watch you cool that card with the MoRa IV 600 while it sits outside of your window dangling over the street below! Subambient cooling like we used to do in the early 2000s ;)

[@vx53c]

brave brave man i appreciate you so much for doing such experiments. i guess you maxed out your psu + fan controller thermal and wattage limits with those tiny fans.

[@srb5776]

I love the sound of the server fans. Maybe I am used to it working around them

[@81formann]

Cool experiment. Weird radiator. Fin density and surface area is extremely low. Would have been interesting to see the performance with double or triple the fin density, but no point in wasting time and money on it. No matter how perfectly the fans gets matched to the airflow restriction, the setup would still be way to loud.

[@roboman2444]

Yeah, those delta fans are really optimized for static pressure over just pure airflow. They would've been perfectly happy with much denser fins, or a radiator that was 4* as long. Normally they are used in 1u rack servers to blow air throughout the entire 3 foot long server case and through all sorts of different heatsinks.

[@Adamgreen735]

9:36 yes you definitely cool an RTX 5090 with this.... My ears perked up and i thought i had not read the title correct, i was sure it was a 4090..... I was thinking does DerBauer have a 5090 already...🤣🤣

[@skyoreece9805]

Good videos as always, happy new year x

[@shaneeslick]

G'day Roman, Shiek & Makita, WHAT???

[@oMega-sm1eg]

I think you have to leave some gap between the fans and the radiator, otherwise the area behind the fan hub has no airflow. You were effectively only using like 50% of your radiator if you place the fans on the radiator, maybe add a 3d printed duct in between. This should help tremendously with push/pull too, fans don't suck in air properly when it is right up against a rad.

[@MrGhostLt]

Roman how about mounting some EDF Ducted Fan instead to make the pc (fly)( 120mm around 7-9 kg thrust ) should be able to push some air thru the radiator. Energy efficient No but no one have gone that over the top yet

[@tronus98]

Caught the itx bug a while back. Eventually added watercooling to my addiction. Now I have a stash of those neat alphacool rads. I have the 4x40 version of the one featured here. I have a handful of the 60mm variety as well. So little and neat!

[@tronus98]

My 4(8)x40 is the ut60 model

[@hazonku]

I love when you do these impractical and silly experiments.

[@gordowg1wg145]

Using plenums between the fans and the radiator would have given a much more uniform flow through the radiator matrix, significantly increasing the efficiency.

[@crystal_reverie]

Always love this kind of videos showing these weird cool things about computer hardware. Also question: Is the fan controller controling the voltage to fans or only sand out PWM signal but fans get power from PSU?

[@PainterVierax]

it seems that controller board provides the whole power with a buck regulator. Otherwise, there is no reason a simple PWM signal circuit would overheat as such.

[@heslo8767]

Great content! Absolutely love stuff like this!

[@stevesloan6775]

I would love to see a system that incorporates all of the liquid and air cooling tech in one package. Even a NOS system that drag cars use would be cool. Maybe some kind of water to air intercooled computer, like wild cars use to cool inlet air temps. I know that sounds very tong in cheek, but Im being serious. Could be interesting to brainstorm! : ]

[@torcheddreadnought899]

I remember replacing blocks of those fans on servers. I had a stack of paper on the other end of the workbench when I turned it on to bench check my repairs, when I turned it off, the paper was all over the floor 😅

[@xx__ven]

I honestly like these DIY videos, waiting for the motorcycle rad waterloop edition

[@Mark_Williams.]

9:33 - You heard it here first folks, that rad will cool an RTX 5090!

[@danbrit9848]

i love the in line look of it

[@CaveyMoth]

Imagine bringing this configuration to a LAN party, or a Starbucks. That would be hilarious.

[@Mack_Dingo]

Probably help if you glued little heatsinks all over the Rad End Caps, Hot water probably sits there the longest cause the rad looks restrictive af.

[@TheTechMonkey702]

I had built one of those that was double size (4x fans). Ripped out 8 Dell Server blade fans like what you have, just without the double stack option. Im glad we're all a bit mad

[@Iam_Dunn]

0:00 … Im only here to see that radiator launch the computer into space! 😂 ❤ :)

[@PlaCrown]

I basically did this when i tried to make the thickest 120mm radiator sandwich ever. push pull configuration with 2x38mm thick 120mm server fans, The sound levels were tremendous! Terminated both fans directly to molex since each one drew ~45W

[@Saddedude]

The hotter the water temp, the greater the delta between your ambient air and the water, the more efficient your radiator gets. Theres some math involved i dont understand because i am dumb, but its exponential. So at 60C that radiator was dissipitating 450w. But at 20c its probably only good for 50w or something. I have dual 480mm rads, a 5950x and a 7900xtx, and with modest fan speeds i still get into 30-32c water temps because rads arent that efficient below 30c with ambient temp in the 20's.... 12 Artic P14 max fans, so they turn 1700ish at that temp.

[@weskirkland5850]

11:48 Put the fan controller in the fans exhaust stream to cool it.

[@Ballanux]

If you plugged the fan while it was rotating from the airflow, it probably was generating negative voltage, that got dumped into the fan controller killing it

[@Leo99929]

You can use an electric domestic under sink water heater maintaining a target temperature to measure the radiators heat dissipation rate by measuring the heaters power consumption over time and the difference in temperature between the water and the room's air. I'm currently doing this. For a 350mm x 120mm radiator with three cheap fans I'm getting 22 W/K max, and 960 W max. That's at a dT of 40°C - 45°C. Meaning that if the room is 20°C then the water would be 60°C to 65°C.

[@Leo99929]

You can do this the characterize the performance of any radiator and fan combination. You could use this to objectively compare PC radiator performance. W/k/CFM is possibly a good metric? The higher the better.

[@Leo99929]

This metric would also enable you to know before you build a PC what the water temperature would be for the water loop given the system component wattage. Also given the fans cfm vs db(A) you could estimate how loud it would need to be to maintain your target operating temperature, OR what temp the system would be at a given loudness.

[@csl750]

Daisy chained to fit a 1u server chassis... really cool video..

[@KunalVaidya]

The fan controler could be place in the airflow exit , it'll cool the controller along with the radiator

[@FAB1150]

Those fans have serious static pressure! You might benefit from running a much denser radiator, or maybe two radiators back to back lol... Next time 😆

[@ZeroHourProductions407]

This feels like it's sized to enable an internal console liquid cooling setup, while Lian Li back in the day made an external case for the xbox 360 to be able to transfer the guts of such a console into a pc sized case to enable a larger amount of airflow to keep things in control. Granted, that was probably made before knowledge of the target temp behavior the console was doing.

[@shadir007]

Kicking on the fans took me back to the dual 60mm counter rotating fans we put on a diy server rig and my buddy had his plastic Starbucks cup behind them while we were building, and it flew off the table when we turned them on. 😂

[@brandishwar]

That fan controller was getting hot because you were jamming about 75W through it. The controller IC is the LM2596 from what I can tell, which its data sheet says is rated for only 3A *output* current, meaning 36W at most at 12V. And you were trying to shove twice that through it.

[@leoormesher2762]

There are fan controllers you can buy that offer 30 ish watts per fan header. They are a bit pricey but they are what you need

[@krazyfrog]

I know this was a fun project but a slightly more practical test would be to use a single 120mm radiator. I ask this because sometimes a mini-ITX case like the Fractal Ridge or the Terra can fit only a single 120mm radiator and it would be fun to see if it can cool both the CPU or the GPU with that.

[@PainterVierax]

well, to do that you'll have to trade room temperature and use a noisy server fan. That's how datacenters manage the thermal dissipation.

[@JohnWilliams-gy5yc]

Fan raving for the last 24hrs of current Nvidia generation is an epic closing curtain show.

[@NAMOR5000]

Nice Sunday Project, spielerei lol. Nice experiment though lol. Poor ears.... Happy Sunday.

[@MD_Builds]

As you probably already figured out, there is a limit to how much radiators can radiate. Even with excessive air throughput. Its just a limitation of the heat passing to the surface area from the water to the fins. IE the lack of surface area is the bottleneck.