Building a Cool Box for multi-GPU-PC's [in function]

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rappet
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Sorry for that long post above :oops:

I am wondering how much effect cooling the air in such a box might have on the gpu perfomance?
It is still aircooling, not watercooling, but the cold air can be much colder then normal space where people have to be in.

And what temperature can cold air can be not damagin computer parts?

Greetz,

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mib2berlin
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Hi, I meant you get all 3 systems in one cabinet, they are huge.
Without air condition they cost about 500 Euro, these work with 8-10 cooling fans.
But was only an idea. :)

Cheers, mib
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rappet
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mib2berlin wrote:Hi, I meant you get all 3 systems in one cabinet, they are huge.
Without air condition they cost about 500 Euro, these work with 8-10 cooling fans.
But was only an idea. :)

Cheers, mib
Really, 3 pc in one cabinet?
Ok, I got to take a better look then.. Thanx

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rappet wrote:... The 'glass' parts is the biggest puzzle, but I might get my hands on some aluminium window products with isolated glass that are dissaproved for architectural project.
Be sure to compare thermal transmission quality of whatever glass or plastic that you use. Get the one with the highest blockage.
rappet wrote:I am holding back on going on water, because I really enjoyed the flexibility of swapping GPU easily in the past two years... But probably I'll go on water some day, but not 'today'.
Having to move water-cooled components can be really painful unless you use, as I did, lots of quick-disconnects; then the pain's lesser, but still still there.
rappet wrote:II rather build my own custom made big fridge... Haha
I'll let you guys know if I can get Mr. Freeze(r) to do my bidding as I had originally planned now that I've fully digested Glimpse's directive to slow down the coolant flow rate.
rappet wrote:... so it must not be something I need to have maintainance on and climbing ladders to adjust a thing.
Think "lever" with extension to comfortable reach or electronic control.
rappet wrote:... I will try to find out if there are systems with selection of two outlets; one will go outside through the wall in summer, the other outlet I could lead to i.e. a hallway to warm the building in winter. Should be possibe with splitting outlet tube by simple hardware manual switch.
Always keep in mind that things don't have to be all or nothing or otherwise mutually exclusive. The diversion doesn't have to be all one route or the other, particularly since it's output heat. You might want the flexibility to optimally, simultaneously spilt the output heat between exiting the structure and warming the cool space for maximal comfort.
rappet wrote:I can imagine you, Tutor, water the plants, smiling not to throw away the water :-)
My parents taught me, "Waste not, Want not."
rappet wrote:...And they throw in cold air, but also exhaust heat at the same place, right?
My AC units take room air in from the AC's front lower panels and passes it over an inner cooling rad unit and then passes the heat out the back thru a tube near the top of the AC and then outside; it passes the condensation thru a hose at the bottom of the AC. I put an extender pipe on the condensation hose and a splitter at the end to water my plants. This is where you might get creative and "want not."
rappet wrote:Could I the install an airco on the outer wall near to ceiling, and that is it.
I'm assuming that this option involves your having the Cool Box. But I'm not sure whether the outer wall to which you refer is the Cool Box's outer wall or the surrounding room's outer wall, or whether the CoolBox's outer wall is the same as the containing room's outer wall. The optimal place to put most room AC's is in the warmest area in the room. This usually equates to the highest point possible. But, see next response.
rappet wrote:Or should I direct cold air from the airco to below/front of PC's with tubes?
Yes, because it's more effective to cool the system components directly; just make sure your case and inner fans and the component(s)'s air intake end are coordinated properly for optimal air flow. Assuming that your system's taking in cooler air from the front and exhausting warmer air out of the rear, if you could build a heat capture unit(s) to receive that warmer air from the back of your computer and direct the air up and out of the back of the Cool Room and ultimately outdoors (or somewhere else to do something useful), then you could reduce the amount of work that the AC has to perform. Now you have the air conditioner placed for optimal intake of warmer room air (high up) and if you can port that cooled air directly to where it's most effective (down and to the front of the computers) and direct out of the Cool Box the heat generated by the computers, you've got a win-win-win situation. Combining your great ideas can be most fruitful.
rappet wrote:Or should I have an airco on below/front and have an exhaust fan on the wall near to ceiling at the back of the computers.
Here's where our geographical difference might lead me to excess. Where I live in the Southeastern U.S., we can have HOT summers -mid 90's to low 100's. I'm assuming that this option involves your having the Cool Box. For the computers to operate here in the coolest environment, I'd have too keep both the well-insulated Cool Box cool and the surrounding room air cool; so I'd need a second unit to put in the Cool Box, unless the room was otherwise air-conditioned. If the room is otherwise air-conditioned and you built a device to take as much of the hot air emitted from your systems out of the Cool Room as suggested above, then I'd still rather have the air-conditioner located where the air is the warmest in the cool room, but have the cooler air the AC outputs diverted directed to the front of my systems in the Cool Room.
Last edited by Tutor on Thu Mar 05, 2015 10:12 pm, edited 3 times in total.
Because I have 180+ GPU processers in 16 tweaked/multiOS systems - Character limit prevents detailed stats.
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Tutor
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rappet wrote:Sorry for that long post above :oops:

I am wondering how much effect cooling the air in such a box might have on the gpu perfomance?
It is still aircooling, not watercooling, but the cold air can be much colder then normal space where people have to be in.

And what temperature can cold air can be not damagin computer parts?

Greetz,

Condensation is the true destroyer. Its a combination of the amount of moisture in the air and temperature variances. "The ratio of the amount of water vapor in air compared to the maximum amount air can hold at a specific temperature is called the relative humidity. When air is absolutely dry, its relative humidity is 0 %. When an air mixture has reached its dew point temperature, its relative humidity is 100%. The higher the relative humidity, the greater water vapor content of the air at that temperature. ... ." See [ http://www.lamtec.com/tb_understanding_ ... ation.html ] see, also [ http://forums.anandtech.com/showthread.php?t=1518629 ]. You don't want your systems (computers and AC] generating condensation inside your computer. That's where my dehumidifiers assist by removing moisture from the atmosphere. Otherwise, nothing that we've discussed here appears to be able to get your computer parts so cold as to damage them from the cold alone.
Because I have 180+ GPU processers in 16 tweaked/multiOS systems - Character limit prevents detailed stats.
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rappet
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Guys, Thanx again for your thoughts...
I am still figuring out the plan and then decide if to go for it (this summer hopefully)...
To have some inside I skethed a plan to give inside in possible setups when making slide panels my self.
The main technical thing I have to find out is what simply airco I can install and have the cold air directed to the below/front of the computers, and not having condensation problems.
to be continued...
I do not mind having this CoolBox construction tking space... I even like the idea of having a small showroom of the PC's :lol:
Currently I also do not use the space above the computera, so I won't lose any effective space compared to current situation.
plan-02.jpg
TapperCoolBox-02b-small.jpg
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Hydra
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Anything that emphasizes passive cooling will go a long ways to reducing heat build up. i.e. see if you can make this thing work entirely passively before working on active cooling.

I used to live in South Africa, and houses had a quaint feature. We had little vents at the floor and ceiling which we could could open in summer and close in winter. It worked quite well and our house was relatively comfortable in Summer with no air-conditioning. I note similar-ish features (high window, low window) in old 1800-1900 buildings.

Are you attached to your computer cases? It seems that they would just impede any airflow around the GPUs, and then the heat is simply pumped into your room. That's not how we dry laundry, at least in Canada. We vent dryer heat directly out of the house.

Perhaps with off the shelf water cooling you could directly vent the heat out a laundry room pipe. This would have a very low power requirement.

Tutor is right though. See if you can recapture the heat.
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rappet
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Here is the update for the CoolBox plan.
The right tube is going from the inner unit (in Coolbox) to the outer unit of the airco.
TapperCoolBox-03-4small.jpg
I am not sure yet how to go for the passive cooling; when airco and/or the mechanical ventilator is off.
Probably I will have one system for airco and venitlation air (without airco actually on)
The left tube could be an extra for ventilating heat to inside hallway in winter (when not using the airco)
If this might not be enough, as alternative I am thinking of making a ventilation grille or big shutter to the inside room (on the back of the computers) for winter and/or in the outer wall (right side of computers) for summer.

greetz,
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Jorgensen
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won't condensation be a problem?

you cool down the metal parts (cabinet), but there is a lot of hot air inside the case, so there might be a condensation problem i guess, but i'm not an expert.
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rappet
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Jorgensen wrote:won't condensation be a problem?

you cool down the metal parts (cabinet), but there is a lot of hot air inside the case, so there might be a condensation problem i guess, but i'm not an expert.
Indeed, condensation is a concern I have... I have invited an expert in airconditioning and cooling systems and I hope to get the wise advice on this.

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