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The all systems firmark stress test passed. The water did heat up a little,

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but after 10 hours of dumping over 2,000

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watts of heat into the loop, we are running at a cool 50° C on the hottest

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GPU. Success,

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or well, at least partial success. You

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see, cooling the computers was just one of the multiple goals we had for this

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project, and the other results are currently unknown and colossal failure.

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This room, where I do all my tinkering and computer maintenance, is

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uninhabitable. Because you see, while the new setup does a great job pumping

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the heat from these gaming machines out of here, the old janky system with the

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car radiators from before did a way better job of cooling the room itself.

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So, we asked ourselves, why not both?

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This time we're going to be rolling not one but two PT Cruiser radiators that

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we're going to be cooling with pool water to hopefully chill this room back

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to a habitable temperature like this

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chill segue to our sponsor ODO. Building

17
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a website for your business from scratch can be daunting, but ODO makes it simple

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00:01:21,439 --> 00:01:27,840
with their free easy to use platform. Click the link down below or watch till

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00:01:25,520 --> 00:01:31,759
the end of this video to learn more. First, a recap of how the system works.

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Now, using the thermal camera to show you guys what's working well and what's

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working not as well. The pool loop is

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great. Those tubes that are embedded in the walls of the pool are cooling down

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the water here to about 30° C. We are

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then using that cool water, pumping it through this titanium heat exchanger to

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cool down aha. Over here, the warm water

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that is coming out of the server rack. And you can actually see the temperature

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deltas in those lines. As expected, the water coming from the pool is exactly

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30° and the water coming out of the heat exchanger is wow almost 34. That's

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working really well considering the delta between these loops is only about

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8°. Then on the hot side, we're sending out

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38° water and getting back 40° water,

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meaning we still got plenty of cooling capacity in here. The problem is we

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can't use any of it to cool the room itself because 38° is still pretty

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unpleasant for humans and for some of

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the air cooled equipment that is still in here. At the back of my networking

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gear, for example, I'm able to measure temperatures as high as 60° and the

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exhaust coming out of the servers is as high as ooh 60° as well. We got to deal

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with this. Where we do have some water that could cool our 37° room, however,

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is in our pool reservoir.

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I think you see where we're going with this. Now, I know what you're thinking,

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Lionus. If you want to cool this room, why do you have it insulated? Why do you

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have the door closed? And the answer is noise.

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You hear that on the mic? Yeah. Yeah. Me, too. The whole point of having

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the systems in another room is you don't have to feel the heat or hear the noise.

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So, if I can't close the door, why did I even do any of this? In a typical water

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cooled PC, the order of the components in the loop doesn't really matter

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because the difference in temperature from the hottest point to the coldest

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point is a fraction of a degree. That's

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not the case here. We're looking at deltas of two or even 4° between hot and

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cold sides. So, the loop order suddenly matters a lot. I'm kind of thinking,

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well, the systems that are on the water cooling are running so cool that they

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could afford to be on the hotter side of things. So, we take the cold pool water

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that comes in, we go straight to the car radiators and we actually dump that to

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the systems afterward. Okay. Yeah. Yeah. They can tolerate 2°.

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That's important because the bigger the temperature difference between the water

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in these radiators and the air in the room, the more effective these radiators

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are going to be, which raises kind of an uncomfortable point. Um, the best place

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for these would be in the 40 41° air

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right at the back of the rack. We can do that. Oh, I know. But then we

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have four additional lines running over

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here and we got to deal with like some kind of hinge system or something. I

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don't know, man. Since we're in here recigging tubing today, there's a couple

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of other things I wanted to investigate and maybe change. First up, I just want

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to say these manifolds worked great. The

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cold water comes into this one, top and bottom, heats up in the system, and then

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the warm water comes out the top and the bottom of this one. But we noticed

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something when we were firm marking the systems. System number one up here runs

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significantly hotter, about 5°, than

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system number five. And this actually makes sense. Even though we have water

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coming in the top and the bottom, just because of gravity, you're going to have

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more pressure towards the bottom of the manifold. So, you get more flow. That

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top system, it's got the same temperature water. It's just not running

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as fast, which I don't consider to be a

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problem. 50° GPU, even if it was a little hotter, I wouldn't mind that if

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it meant that I could get rid of these tubes and have neater management. So, I

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want to see just how much hotter that system gets if I block these completely

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restricting flow through the bottom of the manifolds. We should be able to

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check this right away. Nada.

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Yeah, that is not what I expected. I kind of figured that's about what

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would happen. Well, why did you tell me I had to have the dual inlets then?

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Well, cuz that should have worked, but it was already clear that it didn't.

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That is awesome news. But before we turn off our stress tests and drain the

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system, there's one more thing that I really, really need to know. Is it

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actually putting heat into the pool, or is it just losing it all in the ground

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on the way out there? What's that for?

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Inside this access panel are the lines that are snaked through the concrete in

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the floor of the pool, acting as a heat exchanger. If there is a delta between

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the in and the out, that means we won

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the game. It's about actually a little

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over half a degree, almost a full degree, which means a couple of things.

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One, we are actually dumping heat into

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the pool. And two, we have a lot more

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cooling capacity here. Well, yeah. No, we did the math. While

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Dan gets the plumbing started, Alex and I are going to prep the radiators, which

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even with movie magic, haha,

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is going to be a ton of work. Alex, why RGB?

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What do you mean? Do you want this to not be RGB?

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Kind of. Yeah. No, I forbid it. The other big do as we say, not as we do

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element here is that the correct radiator to use for this project is a

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big one that takes the place of the door of the entire server rack. The issue is

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that the suppliers for those are not really that interested in selling one

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rad to one guy. They sell hundreds or

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thousands at a time to enterprises or educational institutions. The good news

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is that our system does work. It's tried and true. This one actually sat outside

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collecting outdoor shoo and working very effectively for about that was over 6

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months, wasn't it? Yeah. Yeah. All we've got to do is get it

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prepped with the new fans. Alex, why didn't we just use the box fans again?

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RGB. The next thing we turn our attention to is how to attach the radiators to the

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piece of aluminum extrusion that is going to attach to the hinge that allows

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us to tuck them against the wall when I need to get back there. Um, you 3D

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printed these? Yeah.

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Okay. Heck yeah. Come to think of it,

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why are we doing the RGB management now? We can do this on the wall and then we

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can just stick things to the wall. Oh, maybe when we're far later in the project and

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I can just convince him that we need to not bother hooking up the RGB to save

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time. What? That was incredibly unsuttle and

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we need the RGB. I'm just looking at these spacers

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wondering if I'm the only one who can't remember how we coped without 3D

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printing. Like, this is awesome.

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Piece of wood.

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With one side of the liftoff hinges now installed. Oh. Uh, those are big big old

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button head screws. It won't quite lay flush. You know what? That's fine. With

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one with one half installed,

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it's time to take this into the server room. We were thinking of using

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right-handed hinges here, but once we saw it in place, it didn't really work

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out. So, we're just going to use left-handed ones instead. It should be You got the ones we need. And I got this

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so we can level up our installation. That was actually the whole reason I had

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you do this explanation, so I could do this. I am so excited to be able to

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close the door to this room. I've been listening to these fans whine all out

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there for the last month. Yeah, I've been listening to him whine

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all the time and just as bad. Well, go for it. Oh, wow. Anytime now.

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Okay, not going to lie, I'm feeling

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pretty good about this.

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Okay, so that's kind of my ideal spot for it right there. So, it can just blow

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right over to my workbench. Yeah, this is going to take a while and be really

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boring. So, fast forward.

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This looks like absolute ass. I think mine's about to come together.

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right now over me. How was the whole

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thing powered? AC to Molex adapter. Oh, are we worried at all about the

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power limits of this connector? A tiny bit. Yes.

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We'll be doing two RGB controllers. Yep. Four hubs and

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24 fans. 24 fans. Yeah. Oh boy. These don't have power

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consumption on them, but in fans alone, that is 5.4 amps. And the connector is

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rated for 4.5. Oh, it's fine.

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No two ways about it. Dang it. No two

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ways about it. Dan kicked our butts for productivity today. He's already got

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this plumbed up, including the new filter. If you guys recall from one of

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the previous videos, there's some gravel in these PVC lines out to the pool

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house, and I'd love for those to not end up in our radiators. So, we have an

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inline filter. Now, this takes the cold water. It goes through there. IT GOES

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ALL the way up over here to where we now have

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Tada. One set of inlet and outlet for our

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radiators and a separate set, well not set, it's just two now for the server

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rack itself. And it all goes back over here

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back to the cold water reservoir where it goes into the heat exchanger. It's

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going to cost us a couple degrees, but that's a price I'm willing to pay. I'm

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not going to pretend your side doesn't look a little bit better, but um hey,

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mine has all reusable cable ties, so I

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can't do it. But yeah, that thing. Hey, look. Everything kind of Well, mine

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stayed in place.

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Hey, nice.

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That looks acceptable.

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W Oh, THAT'S AWESOME. STILL not worth it.

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Oh, 100% worth it. I would spend 3 days

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on this. Oh, I think these are all RPM

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controlled. Yeah. So, we need to go into those. And

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these top ones are easy. They are just going to come out here now instead of

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where they were before. Couple little grips. Not too bad.

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Now, we just need to plug these. We had one plug and we made another one.

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Dingenuity. Now it's time to ever so carefully thread this in.

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Yep. If you cross thread it, it's game over. Ah, so exciting. Final form, Alex.

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You know it's not final form for now. Alex,

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that's so clean now. Ah,

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so much room for activities. With the rack hooked up, we can actually fire

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this loop up. start firm marking the systems again, close the door, and then

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when we fire up the second cold water loop, we'll be able to see if it

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actually makes a difference. Uh, are we are we ready to do it?

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Yeah. Okay. Uh, where are my where my shut offs at? So, but this one is already

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Okay, so I can just fire up this pump then, right? And this is going to go

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here. Okay, let's go pump. Okay, what

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are the odds that it's just going to go? Oh, yeah. There we go.

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Look at her go. Okay. Okay. So, right

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there.

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Thank you kindly.

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We'll go this boy to this boy. These giant magnetic cable

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arches are so freaking strong.

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Okay, not the most elegant solution, but

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it's not going anywhere. Here we go.

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Over here. Boom. Okay, Glenn, go for it. Theoretically, the water will come

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rushing through these tubes. Hey, there it is. There it is. Nice.

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Oh, that's leaking a lot. It's leaking a lot. Okay, let's just try a slightly more different position for

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it. I'm so glad that I crossed that acrylic sand blaster.

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We haven't even seen it in the dark yet.

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Oh, yeah. That's something.

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Let's have a look at the results. Woo!

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00:14:26,959 --> 00:14:33,440
She's chilly, Alex. Actually, that's cooler than I expected.

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Oh, yeah. That is That seems too cool. That doesn't make any sense.

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This is before the reservoir. This is pre-reservoir. Oh, the reservoir

199
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was being heated up by the room. So, we are getting Oh, man.

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It's going to be downright livable in here. Wow. We are really getting some

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effective heat transfer, though. Oh, yeah. We're going from 24 1/2 on the

202
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supply side to 26 1/2 on the return

203
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side. Then we take that 26 1/2°ree

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water. Oh, that's my finger. There we go. 26 1/2° water, put it in the resz,

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and blast it through the heat exchanger. And then back to the pool where we will

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be dumping even more waste heat. Because

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the computer systems in here aren't the only things that dump waste heat into

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this room. Even though I've insulated all these lines, my in flooror heating

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contributes a significant amount of

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heat. We want this thing performing its best. So, we got to hook those RGB

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controllers up to a system in order to um you know get them running properly.

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Whoops. For those wondering, the right way to do this is to just have an

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external USB to internal header adapter.

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My ARM hurts so much right now. This is a really awkward angle.

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Any RGB that you want particularly. Oh,

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nice. Hell yeah. Success. We got this.

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In all seriousness, we do need to do something about this power adapter. The

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surface temperature is over 60°. Oh, that's a lot. We also have this, you

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00:16:07,519 --> 00:16:16,320
know, some strategically positioned zip ties. Our new cable management stuff is

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so awesome. You basically just

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decide where you want it. These are not the real plates, by the way. They are

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less ugly than this. Then we've got this awesome one for hanging wall warts and

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power adapters and anything else like that. Then you just put the cable ties

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on. Boop. And boom, magnetic. But we're

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not quite done with this one yet. You know, in a way, this is really your

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fault. You're the ones who enable us. We went full smoo town on this one. Now,

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all we need is a mounting solution. And I think you guys knew where this was going. Now, this will be a true test for

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our magnetic power adapter holder. Whoa. Okay. Yeah. No, she can't handle that

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much weight. There's also a uh plastic film here. We can lose that.

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Holy. Without the plastic film, she goes, Alex.

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Oh, it's RGB.

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Oh god. What are you doing? The more important thing, however, is that I

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think this might actually be working. Oh, no. That's still pretty hot there.

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We're going to need a better long-term solution. We're done. All that remains

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now is to see if it worked. Some stuff

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is pretty obvious. We've got that super

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chilly pool water heading out to the radiators.

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and less chilly. About a degree and a half water coming back that goes into

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the reservoir into the heat exchanger where it heats up and

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goes back out to the pool. So, our total

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delta here, 28° coming in, 33.3

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going out. This is funny. You can see the temp spike when I turned off the

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pump to remount the power strip. But overall, we're sitting at 52°.

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Exactly within the range we'd expect given that we're running the water

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through those radiators first. 2° higher.

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Okay, here we go. Here we go. Here we go. Here we go. 28.5 coming out of the

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pool.

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29.4

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about a degree. Is that what we had before? Yeah, roughly. Huh. I was expecting more

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somehow. Oh, 29.6. Probably just ending up in the ground.

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So then the final question to answer is, did it make a difference to the room?

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Moment of truth. You ready? Yep. It's what, 36 12 to beat?

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Down to 31. Damn. 31 and a2.

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We just dropped 5° just like that. That

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is flipping awesome. And that's at a hot

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point in the room. Actually standing here where I'm getting blown on a little

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bit more directly. I'm sitting at a frosty 31°

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which okay is still pretty hot. But this

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is with the door closed. I can finally

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actually run the other gear in here without worrying about it overheating

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and dying. I mean, it's still hot, but

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it is across the board running cooler

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now. 58 under 60 now. All right,

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below. If you guys enjoyed this video, make sure to hit up the one where we

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actually hooked up the systems to the cooling loop. It's well, it was an

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adventure.