Bitcoin Forum

Hey all. I tried to search the forums here and couldn't find exactly what I was searching for. Basically, I set up a 6 GPU rig recently and can't figure out how to cool down the GPU's adequately. What I have is: 6 XFX RX580 and 3 fresh air fans coming in and 3 fans going out of the chassis. I also set the fans on each GPU to go to 100% at 75C. Even with all of this, I am running at 87-89C consistently. And from what I understand, this is going to either burn my cards up or create a fire hazard. So, two questions: 1) can anyone recommend a very high air flow fan that I can daisy chain with 4 pin molex and 2) any software tweaks I can use outside of afterburner?

After spending a butt load of money, this rig is going to be a paper weight if I can't cool down my cards.

Thanks for the help.

I thought GPU mining was a thing of the past. Well that shows me. Try under clocking your cards so the don't run so hot. Also look at your fans. Are they the largest you can get. And don't have three sucking air and three blowing it out. Two intake to three out would create better cooling I believe. :)

thank for help  ;D ;D ;D what type of fan you use?

the simplest solution is just to use air conditioning

what is your outside temperature?

I've got a couple of 120's in my gaming rig which works for me but many prefer 180mm fans as the will move more air quieter. :)

And burn twice as much power than he does ? That's smart lol...

No, the real solution is exaust the hot hair from the room. Great solution is a hyroponic culture tent with intake and outake fan (500cfm)

Are you even using the risers or have you placed all the six graphic-cards directly on the motherboard? Plus which miner are you using right now? Have you tried undervolting? Undervolting can greatly help in reducing the temperature levels, it does affect the hashrate a bit but with that, your GPUs will consume less power and will remain less hot.

I stringing some fan VWM for reducing heat and installed in every side in the frame, so far is a good enough for decreased heat around 2-5 Celcius. I use the Delta brand of VWM.

like this:
https://www.amazon.co.uk/Airthd%C2%AE-Brand-Cooling-AFB1-212SH-12025-12/dp/B01NA7J2UW/ref=sr_1_1?s=computers&ie=UTF8&qid=1528998360&sr=1-1&keywords=pwm+fan+delta

To get the temperature under control, you have to:

1) Check the spacing between your GPUs
2) Fan settings, take them off from "auto" and manually set them on 65-75% or something
3) BIOS modding, mining BIOSes give you an edge over using the stock ones
4) Airflow through your mining room (cold air in, hot air out)
5) Overclocking/Underclocking settings

Try to fiddle with those and you should get your temps. down :)

Haa  ;D
Have you been living under a rock?
Never heard of any cryptonight coins hard- forking to be ASIC resistant?  ;)

@Levieth02ng
I can recommend box fans like this one: https://www.amazon.com/Lasko-3733-20-Fan-Box/dp/B00002ND67

I would go with some serious air flow. https://www.amazon.com/Hurricane-Box-Fan-Efficient-Lightweight/dp/B06XGSJ94B/ref=sr_1_1_sspa?ie=UTF8&qid=1529008912&sr=8-1-spons&keywords=hurricane+box+fan&psc=1


and then --IF NEEDED-- something to suspend it in place:  https://www.amazon.com/Weaver-Leather-Adjustable-Holder-Black/dp/B004BAXVUQ/ref=pd_sbs_468_3?_encoding=UTF8&pd_rd_i=B004BAXVUQ&pd_rd_r=FH26YR5YYPWSYC1MKKJ6&pd_rd_w=T8A73&pd_rd_wg=R80gc&psc=1&refRID=FH26YR5YYPWSYC1MKKJ6

 I know you asked about daisy chain into molex but if you are just going to keep on using little computer fans you aren't really going to change much.

You can keep using the little computer/molex connected fans but if you add the box fan you will move A LOT more fresh air and you don't even have to set it on a high setting.  This should work in open air or even a closed chassis which sounds like you have a closed chassis.  If you can run the chassis open-air that's even better but I imagine you might have some requirement to keep it closed.

It would help if you could post a picture of your setup so we can see what you are dealing with.

In my situation, I'm lucky enough to keep my stuff in a basement.  I run box fans in the summer but no need when it's 0/32 (c/f) degrees in the winter :)

This thread appeared in the Bitcoin forum to begin with. But to your question maybe I have, real life and that, though I do try to keep up with Bitcoin when I can.

put it into your fridge.

The most effective way to cool down the rigs is exhausting the hot air in the room so that it's replaced with cooler air that is circulated around the rigs. I recently had to add an 8" inline vent fan after my 3 rigs were starting to run hot with just box fans around the rigs and AC alone was not effective at cooling down the room enough to maintain the rigs cool. I run the vent fan on medium with an adjustable control and now the room is MUCH cooler. I don't need to use an intake fan and the AC doesn't need to run as much.

The downside is vent fans are loud. The addition of a 8" silencer, R6 insulated duct and neoprene clamps makes it at least 50% quieter. Putting it in a box helps to muffle the sound as well. I can't even hear it with the door closed.

Vortex Powerfans VTX800 Vortex 747 CFM Powerfan, 8"

https://www.amazon.com/dp/B001I49Q84

ACTIVE AIR ACSC Duct Fan Speed Adjuster

https://www.amazon.com/Active-Air-ACSC-Speed-Adjuster/dp/B007TFTITS

Fantech LD 8 Silencer, 8" Duct

https://www.amazon.com/Fantech-LD-8-Silencer-Duct/dp/B00073IO2Q

Fantech FC 8 Mounting Clamps, 8" Duct - 2 per box

https://www.amazon.com/Fantech-FC-Mounting-Clamps-Duct/dp/B0039QCX8O

Speedi-Products FD-25R6 08 8-Inch Diameter by 25-Feet Length R6 Insulated Flexible Duct with Metalized Jacket

https://www.amazon.com/gp/product/B0085UZP4I

Good tips for silencing vent fans:

https://www.youtube.com/watch?v=W2D15m7MD40

https://image.ibb.co/gOpJ2y/Vent_Fan.jpg

https://image.ibb.co/g8oQFJ/Rig_with_Fans.jpg

Instead of cooling down your rigs, how about changing your coin algorithm ?
Mining Cryptonote Coins and your rigs' temparature will decrease at least 7-8 celcius

That was isn't a solution.
How if you faced most Cryptonote coins are being less profitable for mining?

OP
You have a few good advice above. I Super agree with this one:


You only need to implement this in your own ways.   :)

On whattomine.com we only compare profit of Ethereum-based coins with XMR and ETN. There are many cryptonote coins that 10-20% more profitable than ETN by now. However, most of profit calculator website is underestimating cryptonote hashrate. They only estimate 3960-4380 h/s for a rig of 6 x RX470. I usually have 4800-5000 h/s for this ( someone can make it to 5500-5800 h/s with more tuning)

If you put the 6 cards in a closed chassis you will need some superstrong server fans, they will cool your cards but its going to be very loud.

I´d recommend to rebuild your rig to openair if possible, much easier to cool and not so much noise.

That even didn't answer my question.
Let say, most of Cryptonote coins are being less profitable for mining, what would you do? Break on mining for a while?

These cooling systems must be work on every condition. So your suggestion isn't the solution at all.  ;)

try to under voltage this will give you some help

and you can use Large fan can be used to push the air out

the final thing you can use AC

Do not spend money on AC. Complete waste.

Its all about heat transfer and yes, 100 F air will work just fine.

Best thing I ever did was make my cabinet. It has 2 3kCFM fans on top which pull air from the bottom and exhaust at the top. Its located in the garage and I have a couple windows open and it just pulls air from outside. We have had plenty of 95F+ days here and i'm amazed how well this works.


This cabinet uses about 23KW of power currently.


https://i.imgur.com/lS2K3Jx.png



Incoming air is 95F and the exhaust is 108F
https://i.imgur.com/zfiwGG5.png


This forum sucks for adding pictures. Or maybe its because my account was hacked and I still havent been able to gain access back which requires someone to make a new account for some reason which then makes you a "newbie" or something like that and make you want to leave this horrible forum interface

It's all about airflow past the cards.
Not mine at all, but good summary of a lot of thoughts around cooling open air rigs with "hot" air.
https://www.youtube.com/watch?v=59I1KvEpMco
Notice the comments about the improvements made related to the airflow past the cards.

My own rig is spaced up to have 8cm c-c between the cards and a 12 inch table fan circulating the air through the basement. It's only a 9 card 1KW rig and the cards are running below 60 C. The next experiment would be to baffle airflow past the cards using 4x140mm chassi fans (one sheet at riser level and one at the top of the cards), but it works so well already, getting the cards down to 50C will not gain much since the OC ability does not seem to be that affected by temp when they are this low.

The fan circulating the air dropped the card temps about 10C, so general ventilation is very important, as it also helps getting the heat out to the surroundings (It distributes the hot air in the air volume, improves transfer of heat to walls etc) even if you don't exhaust the air.

Remember that exhausting air menas it must leak in somewhere else, and doors suddenly slamming shut can be annoying to someone important in the family...

I actually got my idea for my cabinet from that video.

heat transfer... lots of air. in and out.

Are your rigs oriented with the backplates of the cards pointing up?
Any pictures of the cabinet open?

Nope, just tossed my open rigs in there as is. Each rig is 8 cards. The other great benefit to this setup is noise. Hardly notice anything is going on now.


https://i.imgur.com/5rWJCwq.jpg

It looks a lot tidier as well with the cabinet closed  ;D

I already thought that this is not new information, because there are a lot of interesting ideas on the web and even on YouTube to implement your plans.

i have a small shed outdoors with only 5 miners. run 2 of these:

https://www.amazon.com/gp/product/B01G8I7HJE/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

put 4 of these for intake

https://www.amazon.com/gp/product/B004Y753WU/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

underclock gpus, and place the rigs 8"s from the intake vents.

about 3" between each gpu and my stuff never exceeds 76C.

outside temps are 98f and right before the air leaves my shed it hits 104f. typically 80% humidity here as well.

Fisrt of all, what is your room temperature?
I have a RX470/480/570 rig and i'm mining Crypto Night, my average temperatures is about 60c per card and fans at 1000 rpm, but my room temperature is about 10c now.
Mining ETH it consume more power and temperature goes about 68c fan at 1500 rpm.

I use undervolt at gpu and mem, all my cards has bios mod and underclock gpu clock and overclock mem clock

In my mind, it is better to have your box fan pointing away from the GPU exhausts, sucking the air from the GPUs and pulling the hot air from them.

With the technique you are using, do you think the box fan is pushing air into the GPU exhaust causing the GPU fan to work harder to push air? Could that affect the lifespan of the GPU's cooling system?