Cooling and power for 31mh/s rig
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Well it’s already live and running so what is you solution op?
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Okay, gonna drift away a little now…
Another option, however more practical in theory than in this particular case perhaps, is to actually design a atx-compliant chassis from scratch that can take 4 cards (optimal would be 6 cards but that’s a tough nut to crack) that take up around 1,5U/GFX in a server cabinet (4 cards = 6U chassis) and is cheap to produce. Then co-locate these chassis at a proper service provider that can supply water cooled cabinets (blows cold air into front and sucks out hot air in the back).
I’ve been looking at [url=http://www.opencompute.org/]http://www.opencompute.org/[/url] for inspiration on designing a GPU-mining chassis that’s rack mountable. However I haven’t taken it further from idea to reality. But I figure that if you aspire at delivering a cloud service like this, the idea might be compelling to look more into :)
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I love a good challenge and this is definitely a challenge. I am getting an electrician in to sort out power so that’s one problem solved…ish, and then I’m going to have to buy water cooling equipment over the next week or so. But I’m starting to think I should just setup half the rigs in a friends house and pay them in mh/s + cover electricity cost’s… we will see how it goes anyway.
I am looking into renting a server room in the city center if all else fails :) I will keep you guys updated anyway!
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[quote name=“MrFeathers” post=“49779” timestamp=“1388874179”]
There is a reason that server farms don’t use water. Its much more cost effective to use air.
[/quote]Not entirely true, water cooling is used in a broad manner in a lot of server farms, however we’re talking infrastructure where the water cooling is build into 42U rack enclosures and demand a whole water cooling facility to connect it with. In pure english, a shitload of millions in investment just to get it up and running ;)
Anyways, I still believe that water cooling the cards is the best option, but as MrFeathers pointed out, it takes some investment and serious planning to get it running. It’s still the same amount of heat to be evacuated.
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Lol @ Padda
love the indirect DX system.Experiencing cooling problems myself i was thinking about Direct Expansion and it turns out they actually make CPU/GPU mounted dx systems.
[url=http://www.frozencpu.com/products/13091…#blank]http://www.frozencpu.com/products/13091…#blank[/url]
But thats a little overkill…Working in building design i know most small/mid size company’s just use 2-5kW AC split airconditioners for their server rooms.
A portable AC will do the trick as well.
Lot cheaper to acuire then watercooling, but the downside is they draw a lot of power/$ when running and condesation resevoirs need emptying often.If you got the money/space to spare and it fits in your house you could improve overall efficienty by recovering al that exess heat with something like this:
[url=http://www.daikinac.com/content/residential/whole-house/daikin-altherma/]http://www.daikinac.com/content/residential/whole-house/daikin-altherma/[/url] (for hot tapwater)
Or something like this to use the heat in the rest of your house.
[url=http://www.brinkhrv.com/]http://www.brinkhrv.com/[/url]Or just maybe wait with all that stuff till FTC goes >100$ and you can build all that stuff in the minig rooms of your new mansion.
Not sure about house installations in Ireland but if i wanted to do what you are planning the electrician is going to laugh at me very hard… then present me a huge bill when done…
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Yeah about that.
Are you seriously going to use 3x 290 cards on a single akasa 1000w
That PSU is such a shitty choise, have you looked at the specs?, it is only 2x 8pins + 2x 6pins connectors on it, it is multirail with two rails, each supplying a max of 35A, meaning out of those 1000w theres only 840w total on the 12v.How are you going to surfice with only 840w on THREE 290s… even undervolted.
This doesnt look well planed at all. not trying to be harsh, but if you are going to take money from people for a 24/7 service, skimping on PSUs isnt a good idea!
Theres a reason why seasonic 1250/ xfx black 1250 is so popular, 1250w with 1248w available to the 12v, single rail with ALOT of headroom. ive been on over “100%” load for several months without a hitch, it even worked on 4x 280X asus matrix cards which is stock 1.257v! all cards running at 760khash. worked for over 24hours before i decided to downgrade to three cards (not due to crash, just logistics)I have to stress that I’m not trying to be an asshole poking you with a stick. Its just that I’ve been around a while and have tried and experienced “in my eyes” every possible scenario. From burning mobs to burning psu´s to burning gpus, unstable builds, heat issues, network issues and the list goes on.
When something goes wrong in the crypto world, it goes wrong fast… an person paying money for an hashrate would not be happy that it doesn’t hash even though you have your head in the rig sweating and swearing wondering why it will not boot. Its a hostile environment and your reputation gets crashed PRETTY DAMN FAST.That being said i would say that the feathercoin scene is the best place to start this given that i find the community one of the friendliest of em all. But still…
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Paying an extra 200 dollar for an PSU rated 1250 - 1500 would of made more sense because that would allowed you to have 4 cards per mobo allowing you to have less computer but more cards.
I have bought the akasa as a temporary solution when I didnt have my risers for 2 cards per mobo, now though all my R9 280X are on enermax 1500 or Lepa 1600 with 4 cards per mobo.
I would say PSU is the most important factor to mining as it determine the stability of your hash.
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[quote name=“kojima18” post=“49914” timestamp=“1388915530”]
Paying an extra 200 dollar for an PSU rated 1250 - 1500 would of made more sense because that would allowed you to have 4 cards per mobo allowing you to have less computer but more cards.I have bought the akasa as a temporary solution when I didnt have my risers for 2 cards per mobo, now though all my R9 280X are on enermax 1500 or Lepa 1600 with 4 cards per mobo.
I would say PSU is the most important factor to mining as it determine the stability of your hash.
[/quote]Agree, i would be careful regarding putting four of those cards on the Enermax 1500 however. I really hate that PSU, have it myself and it have a tendency to melt/catch fire when pushed. I replaced what was broken and now just use 3x 280X on it and thats the limit in my eyes.
Btw it was the 24pin and 8pin connector that catched fire, seems the dimensioning on the leads/connections just isn’t enough.
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I am also running a couple Lepa G1600… whats your opinion? They are basically Rebranded Enermax Platimax.
I just got some Gigabyte R9 280x and some Sapphire Toxic so will write guides to each card soon… Im reaching 760kh x 4 on the toxic with temp around 68 degree :D
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[quote name=“kojima18” post=“50107” timestamp=“1388967533”]
I am also running a couple Lepa G1600… whats your opinion? They are basically Rebranded Enermax Platimax.I just got some Gigabyte R9 280x and some Sapphire Toxic so will write guides to each card soon… Im reaching 760kh x 4 on the toxic with temp around 68 degree :D
[/quote]Im just got Enermax up my throat, mostly cause i was so dissapointed by their maxrevo 1500w, but also because enermax was shit in helping a guy out.
Asked them for new 24pin cable and 8pin. They just told me that i needed to find that locally. wtf theres no store that has those cables in stock, when enermax themself dont even offer those cables on the website…i endes up having to find a new 24pin and solder each lead over to the new 24pin. looks shit but it worked.