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Hi,
I get temperatures of my GPU's from 55-75 °Celsius and we have still  winter (outside 0 and inside 22 °C).

How to prepare for summer (outside 35-35  °C, inside 27-29°C without air con),
how am I going to cool this stuff and not to spend too much money?

How are you going to cool it?

Thanks for suggestions.

You're going to have to circulate the air in the room at a high rate.  My mining room is an upstairs bedroom.  I'm bringing air in from the outside with this fan ...

http://www.airkinglimited.com/page/window-fan.html

And I'm going to exhaust into my attic with this fan ...

https://www.homedepot.com/p/QuietCool-Classic-CL-3100-Advanced-Direct-Drive-Whole-House-Fan-with-Dampers-QC-CL-3100/206047343

Last summer I shut down my mining rigs.  For the summer of 2016, there was decent money to be made on ETH mining, so I moved my rigs to the garage.

If you can't come up with something that will work... One thing you can do is take pictures of your gpus to sell on ebay or craigslist. I do expect the markets to be flooded with people who can't handle the heat.


@gotminer - Be careful about exhausting into your attic, especially when the summer is over and you move into winter. What will happen in the winter is all of the humidity that you exhaust into the attic will freeze, accumulate ice and then when it gets warm it will all melt and you will have water spots on your ceiling and possible mold...

Yeah I've thought about that a little.  Might be a better idea to exhaust through the attic to the outside.

Ok, ok, 1000$ seems to me to much for something that just moves air and given that I can potentially make maybe 1000$ per month (given difficulty etc).


1. Circulation of air
I have to circulate  air that is ideally much colder than my GPU's temp.
Ideally I do not want to use to much for fan's and too much electricity ...

How to do it in my flat is questionable ... got french windows.
Once I open windows, doors , temperature inside and outside is going to be the same.

So that there is no difference when I do it on balcony (north/east side) or inside?
Then I have to protect it against occasional showers  :-\.

2. Air-con
If I buy air-con I guess it would not make sense to circulate air and cost of additional 1-2kW could quite damage profitability... 

That I have to calculate because I currently use cca. 2.7kW/h, that would be 40-100% increase in electricity consumption.
(I wish electricity was free ... somehow  :) )


3. Any other ideas?

In summer, you will need to disable dual mining mode. You will also need to adjust the down volt mode. All this will allow you to reduce the temperature by 10-15 degrees. You also need to think about the circulation of air in the room. To enhance the effect, I additionally use a large floor fan. I even mined in the summer of dcr but this coin is no longer profitable to mine even in the winter.

It doesn't really matter what the temperature is outside. If you have your rigs in a closed room with no circulation the temperature is going to snowball and get too hot. If you are pulling air out of the room say at 3000 CFM (and replenishing with new air) from outside that is 95F / 35C it will help keep the room closer to 95F / 35C.

For example, I have a ton of GPU rigs. Last summer on a 95F day, I turned off the air circulation (to fix something) and just left the windows open. The room quickly went from 100F to 115F in about 30 minutes, it would have kept climbing if I didn't circulate the air again. Your GPUs can handle hot room temps, just imaging how hot they are inside a computer case. However, if you do not have a way to remove the heat from your house / apartment you place will get too hot for you and then eventually your rigs (though they can handle the heat better than you can). Your AC won't help. It is not designed to cool on this level unless you only have 1-12 (or so) GPUs...

Unless you cohabit in the same room as your rigs just open the windows and put an intake and exhaust fan.

GPUs can live in a hot environment. 40-45C is no problem.

Summer is only an issue if you are sleeping in the same room as you are mining.

Something else to consider on air circulation.  This wasn't something that I was even thinking about until Phillip pointed it out to me.  Your exhaust needs to be higher than your intake and they shouldn't be on the same wall.  That's exactly why I'm going to use the window or both windows in my mining room for intake and exhaust through the ceiling.

Also, the air that you are circulating does not need to be cooler than your gpu temps.

There is a huge downside to this. If your are pulling air out of your mining room faster than you can pull it in the intake you will create a vacuum in a perfectly sealed room. That said, I'm sure you don't have a perfectly sealed room. So what will really happen is you will begin pulling cold air from the rest of your house / apartment leading to increased cooling (or heating in the winter) bills.

I suggest you seal off the room as much as you can and equalize it.

I am not an expert, but I can tell you that you will increase your cooling / heating bills if you pull out more air than you can pull in (when you don't have a sealed room).

In a sealed grow tent, pulling out more than you bring in is just fine...

Not saying that they are and I'm really not sure how to test it, but just going by fan specs, the intake is 3120cfm and the exhaust is 3190cfm, so it's only a difference of 90cfm.  I'm not sure what that would do in terms of extra heating or cooling costs.

I can cover the ceiling vent and stick a towel or something under the door, but I'm not sure what more I could do to seal it off any better than that.

I put the miners in the garage and bought two of these from Home Depot for a total of four vents. I have two garage doors side by side and it worked very well last year.
https://www.homedepot.com/p/WindeeVent-2-75-in-x-12-in-x-17-5-in-Aluminum-Garage-Door-Vent-2-Pack-WV1001W/205911851


Check this link and scroll down for example of a door
https://windeevent.com/about/hoa/


On the top vents i tightened the ends of bungie straps on four of the bolts to hold this fan with the stands removed blowing outward.
https://www.homedepot.com/p/Honeywell-12-in-3-Speed-Whole-Room-Circulator-Floor-Fan-HT908/203684186?MERCH=REC-_-NavPLPHorizontal1_rr-_-NA-_-203684186-_-N

So essentially the hot air was blowing out at the top of the door and the cool air was pulled in from the bottom.

Last summer while my farm was still in my home I used some basic €10 room fans + cardboard boxes to make air shafts and deliver cool air from the window right at the intakes of the cards.

Was actually pretty effective, the hottest cards (sapphire 1 fan 570's) saw a dramatic improvement from being thermal throttled at 80C down to ~70C. Well that was when dual mining was still profitable, doing just eth they would hover at around 65C.

This summer I don't expect much trouble, I've moved my farm to a much larger space and arranged them on new racks designed for vertical ventilation... with more cardboard air shafts!  ;D

how many miners do you have

Ok lets say that I have a big garage with 7 windows, big garage door and a normal door. If i where to make a tunnel from one window to another but use insulation styrofoam as the walls of the tunnel do you think the walls would make it hotter than it should be? Maybe I should go with plywood?

I installed 2 attic fans inside my shed windows. one is 1650 cfm sucking the hot air from behind my rigs and the other is 1300 cfm sucking from the side window. 900 cfm also sucking out the ceiling the ducting leading to miners.

have holes in the floors for intake

texas so far has been 80-90F and my cards have been 40-60C range. Just installed the 1300 cfm fan today so those temps can go lower. massive window tunnel going on in there.

https://i.imgur.com/fki3f08.jpg
https://i.imgur.com/x4dpGug.jpg

have as much of an exhaust fan as you can get (in my opinion, there is not overkill here) and put that on the highest window of the garage leading out. now you just need to know where you are going to be getting your "cooler" air from and build walls on each side for the tunnel. as long as you exhaust your hot air faster, you are set.

I have two windows directly facing each other and have two 2500cfm fans (one intake, one exhaust) curretly the window fans are not sealed up and sit about 8" infront of the window. Ideally everthing should be sealed from one window to another (the tunnel) along with the window fans right?

I change power to 74% +/-5% and this already decreases temp.
However, I did not play with voltage as I considered it dangerous and do not have idea how to approach it.
Maybe, it is going to necessary as heat is produces as change in voltage so lower voltage should mean less consumption and less heat.

Yes, you are right, I need to increase circulation somehow and remove hot air from room.

Well, wife approval factor is already quite low, I wonder how it is going to be when I install proper fan.

I have a total of 16 1080ti's

I'm going to buy more high speed fan, but it's hard to make better ventilation for my mining room, it just about 11m2 with only 1 window (30cm x 100cm). I think I also need to set lower power limit, currently it's 83%, maybe I will set it to 70-72% during summer. My place is quite hot, in July, the outside temperature always at 35-36C.

I live in South Florida and have three rigs in my home.  All of my GPU's are NVIDIA.  I plan on putting them on 60% power throughout the summer and pray that helps mitigate the heat without sacrificing much hashpower.  Currently they are on 70%.

I put a cheap outdoor fan in this way: hot air above the farms is blown into the top of the open window, and cold air enters the bottom. The main thing is to circulate.
I also use program MSI Afterbuner to manually adjust the speed of the video card fans.

I live in Texas and we're enjoying unusually cold weather this part of the year.  My hope is that if I can lower the power and back off my overclock so I can put it in a manageable temperature range without having to do too much extra work.  I have a 2 story home and my miner is on my first floor so hot air is going to rise up.  I also currently have one fan blowing for some circulation. Crossing my fingers that will be enough.

Totally agree with you. I think the most important on making better ventilation is separating hot air (out take) and cold air (in take).
One of my favorite cooling solution is here: https://www.youtube.com/watch?v=UQMrtuGFbt0&t=153s

Your first focus is getting hot air out. Hot air rises naturally, so a bathroom type fan placed high above your rigs will do miracles.
You can work with a near passive strategy depending on the size of your openings: big opening towards the bottom for air intake and big opening towards the top for outflow, on the other side to create current.
If you can't, for security or design reasons have big intakes then use ventillators. And as I wrote focus first on getting hot air out rather than cold air in.

Open the windows at the level where your rigs are. And open 2nd windows in the lower level. Then leave the work to the natural convection ;)

ha-ha, when I read the name of theme I think you want prepare your body to summer - not your PC))) About PC I can say just open one side and all will be ok

I think  about the prepare of summer this areas We’re weeks away from high temperatures, sky warnings, and bug invasions. And this year is expected to be an especially hot one in many areas. Before summer hits at full force, make sure you and your home are prepared.That should do the trick, but if you’re looking for a test that’s a little more detailed, you can turn on the unit and check its efficiency with a simple thermometer used to summer vacation. Keep it there for five minutes and note the temperature. Do the same thing at the return vent. The air coming out should be some degrees cooler than the air going in temperature.

There is 2 ways: big coolers or air conditioner.
If your room closed only air conditioner, but this method eat more power check your electricity capacity
Open rooms can be packed with big coolers, this cost less electricity and make your room dusty

Don't forget noise ...  :(

in my country there are only two seasons, summer and rainy season. I keep a mining tool in the top room of my house. When the summer, I often replace the GPU pasta and add a lot of fans. the cost is so cheap
  https://i.imgur.com/zKNBZju.jpg

You should lower core clock and memory clock, power limit of NVidia gpu
In my country, it's nearly 40 celcius outside and 30-32 inside. GPU's temperatures from 62 to 65 celcius
Try to keep your gpus under 65

for the actual profit, it's better to shut them down.

Well, even now I have problem keeping temp under 65  ...  :( ... outside is 6 Celsius, rig at balcony keeps temps at 56-60 Celsius
Inside it is like 65 - 75, I cannot open window, wife complains  ;D.

Temperature varies depending on model type ASUS/ EVGA better than GIGABYTE by 5 degrees or so
Also, I find Zotac s.it, two fan GPUs are noisy and zotac extreme runs fan at 85% and this is at 77% power.

Yesterday, I bought 3 different fans 120mm to 140mm up to 20decibel and sub 10eur  :).
I'm going to test it and then add few my rig and see how temp changes.

I do not think so, depreciation is bitch ... GPU's still make money but I want to keep them 3+ years

don't worry about the noise from the fan, the most important GPU temperature is maintained,
how to replace the GPU thermal paste, have you ever replaced it?

note: don't do thermal paste replacement if GPU is still warranty

One way is to buy the things you will need like sunscreen, bathing suits. Keep it simple, sign your yearbooks, take pictures get into some classes for the summer, start working on your body and then rent a beach house.

If you can make air circulation - do it, other ways are not effective.

In the past, I have simply placed a 20" box fan directly on top of my mining rig and this adequately cooled down the rig.  Every situation is different and your rig configuration may not allow a box fan to be simply set on top of it.  But for me... it's really easy.  I just plop the fan right on top of my rig and turn it on without any need for extra configuration

Fan on top sucking hot air up?  How many rigs/gpu's?  And what was the size of the room?  The hot air has to go somewhere doesn't it?  What was the temp of the room and the average temp of your gpu's?  Maybe it's not a big deal, if we're talking one 6 gpu rig, but I have 31 gpu's.

I think that best idea would be just install and air condition in the room which will allow to cool air and your rigs will work normally
other ideas would be to lower power level on afterburner and create strong air flow with huge blowers or fan..
or the third option - shut the rigs down  ::)

Air conditioning is very expensive and not necessary.

I would not worry about the noise if I did not have 10card rig in the living room ...  ;)

How to replace thermalpaste?!
Well, logic says, remove fans and have a look how it was done before and do it better  ;D

I just replaced thermal paste on CPUs, it is easy, maybe you can try different levels of thickness and check temperature so that you know what thickness to use.

I am lucky enough to live in a climate with low humidity so swamp coolers work well in the summer and they move tons of air. You can get a Bonaire Durango that will move 5000 cfm and keep everything nice and cool while only using 200-300 watts depending on your settings. This only works in low humidity climates otherwise you are better getting off with a high cfm fan or two and doing a push or push/pull type airflow setup to keep the heat out of the room.