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Author Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs  (Read 1256306 times)
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046738
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November 06, 2014, 10:17:26 AM
 #8421

If you have ever been to Thailand and seen the electrical wiring system there, you would shake your head. 2 wire system with no earthing is very common. You look at the power lines on the posts, and you cannot count the number of cables that are strung there (often tv, telephone transmission cables) but there are cases where electrical lines have been low enough that passers by have been zapped in close proximity. Also, MANY people have been zapped merely walking on sidewalks for improperly earthed street lamps beside them. And many kids have been killed by electrocution in pools, school yards etc. Terribly poor electrical work done there very frequently.
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November 06, 2014, 11:23:51 AM
 #8422

Stayed Thailand many times, even lived there.

Not understand a mining center in Bangkok in a shelf.

Mining center in Siberia, OK but hot Thailand?


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Guy Corem
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November 06, 2014, 11:37:09 AM
 #8423

The SP30s in the facility ran for over 2 months without an issue.

The builder stated the following:

Temp was super good. Sp30 did not even get hot.
Just something from the outside.
No insurance at all.

Below is picture of the buildup before the fire.


 

New Mimblewimble implementation: https://www.beam.mw
Spondoolies is back with the SPx36: https://www.spondoolies-tech.com/products/spx36
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November 06, 2014, 12:46:14 PM
 #8424

If you have ever been to Thailand and seen the electrical wiring system there, you would shake your head. 2 wire system with no earthing is very common. You look at the power lines on the posts, and you cannot count the number of cables that are strung there (often tv, telephone transmission cables) but there are cases where electrical lines have been low enough that passers by have been zapped in close proximity. Also, MANY people have been zapped merely walking on sidewalks for improperly earthed street lamps beside them. And many kids have been killed by electrocution in pools, school yards etc. Terribly poor electrical work done there very frequently.

residentially thats not surprising, but for a compound drawing 5MW it requires significant infrastructure in place that is likely free of these flaws, at least for the most part.

and it wouldnt be difficult to install a sufficient grounding system on-site if the power delivery poles did not include a grounding. Drive a few heavy stakes deep into the ground at strategic locations, and wire them all as the grounding system. fairly common

24" PCI-E cables with 16AWG wires and stripped ends - great for server PSU mods, best prices https://bitcointalk.org/index.php?topic=563461
No longer a wannabe - now an ASIC owner!
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November 06, 2014, 01:07:18 PM
 #8425

Reminder:
http://www.spondoolies-tech.com/blogs/technical-blog/15740048-support-for-malfunctioning-units
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November 06, 2014, 01:13:30 PM
 #8426

why the fuck would you make a DC in bangkok! where is 28 degrees Centigrade at 9AM, right now!!! WHY!!!
...


Miners don't particularly mind hot ambient, and because you're not running AC neither do you particularly. Instead of replacing the air with an infinite amount of 20C air, you're replacing it with an infinite amount of 30C air.

I'll drive constantly at 200miles/hour just because my car can do that! I dont give a fuck about road conditions or tires...

better 10cents/kw in a 0C temperature climate than in that location with +30C temperature and 6cents/kw!
Based on what? If you're able to bring enough 30C air in to feed the units and keep them cool, there's no real need for the 0C air. Yes you could run the fans a little slower and save a bit on your cooling costs, but you're talking maybe a percent on of your budget. Nowhere near enough to justify 10c vs 6c.
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November 06, 2014, 01:29:39 PM
 #8427

I really wanted to order one SP10 unit, but i couldn't find enough information about the PSU. I don't want a fire hazard and i don't know how long will the PSU last before going dead.

Sorry, missed this one.

The PSU we are using was designed for the telecom and communication market by Emerson, one of the most respectable PSU providers in the world. It meets all the required safety certifications and it's MTBF (mean time between failures) is over 50 years.
In addition it supports over-current shutdown and over-heating shutdown, hence there is no fire or any other hazard risks.

Screenshots from the data-sheet:
http://take.ms/R08dn


SyRenity please address the issue of SP30 heat dissipation. How do you plan to dissipate 2500W from that small case? Also i see that you under power it again. For SP10 you have a 1kW PSU and the unit needs 1.3kW and for SP30 you have 2 1200W PSUs, but the unit needs 2500W.

Also what is the inside temperature that SP10 reaches? (chips, components etc)

Answer from the team:
Quote
When designing a cooling solution, the most important factor is the heat density, rather then the performance or the total amount of the dissipated heat. The second factor would be the max allowed ASIC’s Tj.

You are right, we are going to maintain the same air flow cooling mechanism for the SP30 as well. We going to use a custom heat sink that was designed and manufactured according to ASIC’s heat dense and Tj with 80mm Fans with a total of ~300 CFM.

The heat sink will be composed of Aluminum K=167 W/m*K 6061 T6 and copper base attached to the ASICs themselves.
The entire design is backed up with a thermal analysis simulations that we are performing as part of the mechanical and electrical design process

So there are no fire risks? Phew  Grin

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November 06, 2014, 01:36:26 PM
 #8428

http://www.worldweatheronline.com/Bangkok-weather-averages/Krung-Thep/TH.aspx
Very nice temps!!! compare that with a data centre! Try to run other miners in those temperature!!!

Air cooling has a big minus in the air temperature. If the temperature is too high then aircooling=0, huge amounts of air pushed thru the miner will be worthless.
Tell me more about how you want to cool your miners with 35C!!!!

I like my miners cold, stable, better wattage, overclock-able. slower ageing, with very low risk of malfunctions or fire...

I'm not putting down spondoolies, i believe in them almost as much as i believe in bitcoin. I know their hardware is top of the line and is working in a high ambient temperature.

This is a case of driving a limo with wooden wheels...
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November 06, 2014, 01:59:23 PM
 #8429

why the fuck would you make a DC in bangkok! where is 28 degrees Centigrade at 9AM, right now!!! WHY!!!
...


Miners don't particularly mind hot ambient, and because you're not running AC neither do you particularly. Instead of replacing the air with an infinite amount of 20C air, you're replacing it with an infinite amount of 30C air.

I'll drive constantly at 200miles/hour just because my car can do that! I dont give a fuck about road conditions or tires...

better 10cents/kw in a 0C temperature climate than in that location with +30C temperature and 6cents/kw!
Based on what? If you're able to bring enough 30C air in to feed the units and keep them cool, there's no real need for the 0C air. Yes you could run the fans a little slower and save a bit on your cooling costs, but you're talking maybe a percent on of your budget. Nowhere near enough to justify 10c vs 6c.

Teal, you'r forgetting that 30°C air is a lot wetter than 0°C, expecially in some places. You can't cool down 5MW of electronic HW with 30°C air  without think about humidity. 
Also 30A are enough for a bad contact to burn a wire, and a fan that blows air direct only helps fire to catch on. That is why in industial plants (not btc related) A/C , thermography, proper electrical distribution and extinguish systems are used.
If it's true that this farm was using 5MW, the lowvoltage threephase distribution system should have handled about 8000-9000 Amps , no peanuts.
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November 06, 2014, 02:16:17 PM
 #8430

why the fuck would you make a DC in bangkok! where is 28 degrees Centigrade at 9AM, right now!!! WHY!!!
...


Miners don't particularly mind hot ambient, and because you're not running AC neither do you particularly. Instead of replacing the air with an infinite amount of 20C air, you're replacing it with an infinite amount of 30C air.

I'll drive constantly at 200miles/hour just because my car can do that! I dont give a fuck about road conditions or tires...

better 10cents/kw in a 0C temperature climate than in that location with +30C temperature and 6cents/kw!
Based on what? If you're able to bring enough 30C air in to feed the units and keep them cool, there's no real need for the 0C air. Yes you could run the fans a little slower and save a bit on your cooling costs, but you're talking maybe a percent on of your budget. Nowhere near enough to justify 10c vs 6c.

Teal, you'r forgetting that 30°C air is a lot wetter than 0°C, expecially in some places. You can't cool down 5MW of electronic HW with 30°C air  without think about humidity. 
Also 30A are enough for a bad contact to burn a wire, and a fan that blows air direct only helps fire to catch on. That is why in industial plants (not btc related) A/C , thermography, proper electrical distribution and extinguish systems are used.
If it's true that this farm was using 5MW, the lowvoltage threephase distribution system should have handled about 8000-9000 Amps , no peanuts.
Absolute humidity will almost always be higher at 30C than 0C, though relative humidity can vary and that is what would cause an issue for condensation. If it's really muggy you might be worried about that, but mining equipment will almost always be hotter than the surrounding air you shouldn't have many condensation issues unless the conditions are extreme.

Not saying you couldn't put them in a place where you could run into issues, but if your gear has a low enough ΔT that it is able to run in a comfortable range with 30C (or even higher) ambient the benefits of the colder climate wouldn't come close to outweighing paying 67% more in electricity costs.
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November 06, 2014, 02:54:01 PM
 #8431


Absolute humidity will almost always be higher at 30C than 0C, though relative humidity can vary and that is what would cause an issue for condensation. If it's really muggy you might be worried about that, but mining equipment will almost always be hotter than the surrounding air you shouldn't have many condensation issues unless the conditions are extreme.

Not saying you couldn't put them in a place where you could run into issues, but if your gear has a low enough ΔT that it is able to run in a comfortable range with 30C (or even higher) ambient the benefits of the colder climate wouldn't come close to outweighing paying 67% more in electricity costs.

'Almost' isn't enough if you'r running with no assurance. 30min of power loss and bad conditions could be met. It's very rare example, of course, but I'll not skip this with so many money invested. My cents  Wink
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November 06, 2014, 02:56:52 PM
 #8432

Really sad for their lose, everybody should learn something from this. prevention is better than cure.
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November 06, 2014, 03:06:09 PM
 #8433


Absolute humidity will almost always be higher at 30C than 0C, though relative humidity can vary and that is what would cause an issue for condensation. If it's really muggy you might be worried about that, but mining equipment will almost always be hotter than the surrounding air you shouldn't have many condensation issues unless the conditions are extreme.

Not saying you couldn't put them in a place where you could run into issues, but if your gear has a low enough ΔT that it is able to run in a comfortable range with 30C (or even higher) ambient the benefits of the colder climate wouldn't come close to outweighing paying 67% more in electricity costs.

'Almost' isn't enough if you'r running with no assurance. 30min of power loss and bad conditions could be met. It's very rare example, of course, but I'll not skip this with so many money invested. My cents  Wink
That argument is just as valid in a cold climate as a hot one though. If the power goes out and conditions change such that the gear is below the dew point you'll get condensation regardless of whether it's at 30C or 0C.
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November 06, 2014, 03:21:43 PM
 #8434

So there are no fire risks? Phew  Grin

Show me one SP10 or SP30/31/35 or SP20 that had sparkles or fire. The units, not the building housing them. We've seen all kinds of proof from Neptune, Titans and BA's miners. None from SP-Tech.

H/w Hosting Directory & Reputation - https://bitcointalk.org/index.php?topic=622998.0
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November 06, 2014, 03:22:30 PM
 #8435

are these sp10's? man what a mess!
I don't suppose any of those could be 'salvaged'Huh          heh can see ebay already..cheap sp10's!

They're SP30s and I'd think most will be salvagable after repair. Some of the cable inlets on the PSUs might need replacing and I'd think that the soot may need cleaning off internally. Other than that, should be good to go in a new location. Probably not.
They're salvaging some of them. The biggest problem are the PSUs and the problematic lead time on those.

Did we find out root cause analysis on this one?  Was it facility related?  PSU related?  bad electrical work?  something fall over?  too much heat?

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November 06, 2014, 03:29:17 PM
 #8436

MrTeal I'm sorry you got crap electricity prices!

The 10c was just easy for comparative point! round number and also what many are paying for electricity. It's also a exaggeration to make a point for investing more in safety; something like better safe than sorry!

The actual price was 7c/kw. Lower prices can be found in parts of north america, scandinavia, etc

Nothing found atm and the fire was on 14october...
Probably bad electrical work in a hot environment.
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November 06, 2014, 03:32:30 PM
 #8437

Now, that is a lot of burn.
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November 06, 2014, 03:32:52 PM
 #8438

Really sad for their lose, everybody should learn something from this. prevention is better than cure.

Lesson - use a real data centre.  Something that has proper cooling/cabling/installation/racks/fire suppression.
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November 06, 2014, 05:04:27 PM
 #8439

Keep your room cozy and warm in the winter ...

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November 06, 2014, 05:13:37 PM
 #8440

Now, that is a lot of burn.
Burn-in test
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