Mining server room (cooling development help) - page 6.

bobR

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Quote from: keybaud on May 24, 2011, 11:34:04 AM

Quote from: xf2_org on May 24, 2011, 11:31:35 AM

Quote from: Raulo on May 24, 2011, 03:12:00 AM

Get an AC unit that is rated for the heat removal at least equal to the heat produced by the setup. Or start with a smaller installation if you have not enough knowledge.

Does anybody have any sort of numbers on heat produced by, say 2x 5870?

Any ballpark numbers on per-rig heat produced?

For electrical devices, wattage to power the item is effectively the heat output, as there is no mechanical loss, so 190 Watts per 5870 approx.

is that 190W an actual measured consumption or the design max from a data sheet ??

w128

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Quote from: keybaud on May 24, 2011, 11:32:40 AM

Quote from: w128 on May 24, 2011, 11:26:58 AM

Seems as good a place as any to say this...

Most of the setups I've seen are using standard cases and populating the motherboards directly. I wonder if anyone has experimented with using a PCIE splitter/extender to run 4x as many cards off a single motherboard? The benefit would be removing the overhead of motherboard/cpu/ram and adding flexibility to place the GPUs away from the mobo.

You'll have a power problem, as the PCI-e bus is rated for up to 75W and the GPUs use this power as well as the separate connectors.

You can use single extenders though:
http://blog.zorinaq.com/?e=42

Interesting, I was under the impression that with the advent of hungrier cards the whole draw had been relocated to the 6/8-pin connectors, not that it was being divided with the mobo slot.

keybaud

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Quote from: xf2_org on May 24, 2011, 11:31:35 AM

Quote from: Raulo on May 24, 2011, 03:12:00 AM

Get an AC unit that is rated for the heat removal at least equal to the heat produced by the setup. Or start with a smaller installation if you have not enough knowledge.

Does anybody have any sort of numbers on heat produced by, say 2x 5870?

Any ballpark numbers on per-rig heat produced?

For electrical devices, wattage to power the item is effectively the heat output, as there is no mechanical loss, so 190 Watts per 5870 approx.

keybaud

full member

Activity: 120

Merit: 100

Quote from: w128 on May 24, 2011, 11:26:58 AM

Seems as good a place as any to say this...

Most of the setups I've seen are using standard cases and populating the motherboards directly. I wonder if anyone has experimented with using a PCIE splitter/extender to run 4x as many cards off a single motherboard? The benefit would be removing the overhead of motherboard/cpu/ram and adding flexibility to place the GPUs away from the mobo.

You'll have a power problem, as the PCI-e bus is rated for up to 75W and the GPUs use this power as well as the separate connectors.

You can use single extenders though:
http://blog.zorinaq.com/?e=42

xf2_org

member

Activity: 98

Merit: 13

Quote from: Raulo on May 24, 2011, 03:12:00 AM

Get an AC unit that is rated for the heat removal at least equal to the heat produced by the setup. Or start with a smaller installation if you have not enough knowledge.

Does anybody have any sort of numbers on heat produced by, say 2x 5870?

Any ballpark numbers on per-rig heat produced?

w128

newbie

Activity: 14

Merit: 0

Seems as good a place as any to say this...

Most of the setups I've seen are using standard cases and populating the motherboards directly. I wonder if anyone has experimented with using a PCIE splitter/extender to run 4x as many cards off a single motherboard? The benefit would be removing the overhead of motherboard/cpu/ram and adding flexibility to place the GPUs away from the mobo.

warweed

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Activity: 130

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This is currenty a very rough model ATM everything is to scale ATM including down to the mono's and the lumber we are certainly very open to suggestions and would be willing to provide dimensions to anyone interested in suggesting cheap and efficient and expandable design ideas (there is a upper limit) but that is to be detirmined by what we can get for power

Another possible issue is fire suppression but that will be a diffrent topic

Keep in mind with the current difficulty increasing there will be a point where mining will not be finically possible but that said we just wish to pay hardware and expenses and shall be happy

The room will be used for other projects in the future and possible leased for projects

-J

We just hadn't considered a partition and it will go into the model for sure

w128

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Quote from: warweed on May 24, 2011, 11:05:38 AM

I do like the partition idea and hadn't even considered that that will certainly go into the design model if we opt exhaust over AC

I don't follow.

Partitioning would be a benefit regardless. It's not a solution in itself, it's something that makes whatever else you're doing more efficient.

$3200 isn't bad. That would cover a single rack for 2 months or less at a typical colo.

warweed

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Yes we have considered a colo but the ones available to us in Edmonton are limited and pricing with min. Band width charges we have also considered leaseong commercial space both are not finically feasible at this time to justify it the power situation is about a 3200 dollar upgrade and it's one time were as colocation would be continuos although I do like the partition idea and hadn't even considered that that will certainly go into the design model if we opt exhaust over AC

w128

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From your image it looks like you're going have one row ingesting the other's exhaust. It would make sense to take some of the concepts employed in datacenters like hot/cool aisles and enclosures.

Basically, create a partition of some kind that separates and contains the hot/cool airflows so that you can handle them easier. Exhaust each of the units into a central aisle/chimney with a return in the roof. The cool aisle is then fed with whatever you decide on to provide the 6 or so tons of cooling that setup would require.

Have you considered using a colo of some kind? Given the amount of money you're spending it might make sense to plop the stuff into one and forget about the power/cooling headaches all together.

acamus

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you should definitely close the system. Put the miners near one another and do an intake/exhaust cycle on each card. Use ducts in a closed system to get all that air OUT of that room. A few of these things might be able to get the air moving although they throw off a bunch of heat themselves

http://www.steam-brite.com/store/images/Mytee_2200_air_mover.jpg

shouldn't really be too much hotspot issues with a ducted system like this.

warweed

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As you see it is how it will be built 16 machines to a shelf and currently 3 shelves with possibility of 2 more shelves going in down the line

Biggest project concerns are heat and power were in the process of contracting an electrical engineer to run 150 amp drop just to this server room which by itself is proving to be a pain the inline air movers are rated to 1260 CFM each and one would be intake the other exhaust if that were the way to go there would be a arduino based temperature controller taking data from multiple sensors to figure out how high or low to adjust the fans to maintain a certain temperature

This option is still more cost effective then to have AC ATM also working within the limited power constraints exhaust fans would be more effective then AC but I do understand the issue of hotspots what about heat dispersal in the Tom setting up perimeter box fans to create a cyclone effect ? Thoughts ?

Basiley

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if you had investments for such hardware amount, you probably had money for professional air cond builder, which can design/engineer cooling for you solution.
check you local newspaper for such ads.
in case if you short on cash - pick industrial air conditioner of appropriate type/power[consult w/dealer].

Hawkix

hero member

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Have you seen this Youtube video - custom exhaust for mining rigs? http://www.youtube.com/watch?v=G5f_e4P6gMA

BitterTea

sr. member

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Why not put that waste heat to good use?

http://en.wikipedia.org/wiki/Waste_heat#Electrification_of_waste_heat

marcus_of_augustus

legendary

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Eadem mutata resurgo

Quote from: warweed on May 24, 2011, 03:24:57 AM

there will be 36 by this friday and more added the following week

36 on each shelf?

warweed

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there will be 36 by this friday and more added the following week

jasonk

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Wow this is crazy, especially considering the massive difficulty increases. I've only been mining for 3 weeks, I've already seen the network MORE than double!

---------------------------

Bad idea to try to cool the room with only an AC, considering 10KW of heat! Your best bet would be to run some kind of ducting to each computer to vent the air out of the room.

The idea is you don't want to cool the heat, but instead get rid of the heat ASAP then add cool air into the room.

--------------------------

Either way, I think this is an insane project to attempt, and I believe we will see a bitcoin economy crash soon enough if people like you start going overboard.

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Quote from: warweed on May 24, 2011, 03:17:31 AM

I can get a 1260 CFM inline blower that will exchange the the rooms air in under a min would that not work ? and yes i understand the hot spot issue AC is certainly a option just weighting each

If you have that kind of CFM going into the room, can you also evacuate that amount of air from the rest of the room?

marcus_of_augustus

legendary

Activity: 3920

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Eadem mutata resurgo

How many GPUs on each shelf (and/or rig)?

Pretty hard to estimate heat without knowing that.

warweed

full member

Activity: 130

Merit: 100

I can get a 1260 CFM inline blower that will exchange the the rooms air in under a min would that not work ? and yes i understand the hot spot issue AC is certainly a option just weighting each

Topic: Mining server room (cooling development help) - page 6. (Read 22824 times)