[ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs

[jtoomim]

Generate a tonne of negative pressure at the hot side of the unit and forget about your little puny fans.

Yes, this is accurate. Thank you, dropt.

While at the same time generating tons of overpressure in the cold aisle using a gas with higher thermal conductivity than air?

Nope. Just air. Overpressure on the intake side helps too, though. In my installation, the cold aisle is just the open space of the DC. Intake fans placed anywhere on the building's outer wall or roof are sufficient to produce this overpressure. It might be hard to close doors, but I think we can manage.

I think "tons of negative pressure" are a really hard to realize idea, you would also need to seal off the tiny holes between sp30s and racks to achieve this effectively.

You generate negative pressure by using really big fans, like these: http://jtoomim.org/files/biggest_fans.jpg. You generate positive pressure by using fans, like those, or the ones in the evaporative coolers. Nothing complicated about it. Sealing most of the holes is important, though, but that's really not hard to do. You just have to make sure that most of the open surface area of your containment structure for air to pass through is through miners, and most of your airflow goes to miners.

It would mean such high building cost that going with immersion cooling would actually be cheaper.

Not at all. I'm already doing this. I looked at the numbers, and decided that building my DC this was would be cheap enough to do it without even being sure there would be a benefit from having such excessive airflow. Cooling equipment is a small portion of our overall budget, even with enough airflow for a ridiculously low delta-T. Electrical work is most of the budget.

Caveat: I don't know if this system is going to work as well as I envisioned. We'll know in a week or two.

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[boscocoin]

Sounds good.

Are the SP30's easy to setup? Would it be a simple plug and play hardware? And how is the customer support like for assistance?

- So when the item arrives in London I don't have to pay duty to DHL?
- If i'm paying VAT do I pay that to DHL or my local accountant.

As someone who used to live in the UK and did the odd bit of ebay buying internationally: I dont think there's duty on UK import.  You do get charged VAT by DHL. 
I have found some of the shipping companies charge you a fiver on top for the "service" of collecting the VAT fee off you.

- In regards to hosting. Does this mean that when I purchase the item they will not send it to me.. They will run it from their own site and mine for me?

Right.  I have some SP10 I bought and they are hosted I think in Israel.  I think they have multiple hosting locations in different countries.

I think also if you pick out your own 3rd party hosting they presumably will ship it direct to your hosting co.  For US and some other places there is no import nor sales tax/VAT hit on import of computer equipment, so it can be worth it just for that if you live in europe with the dreaded VAT.

Or maybe in UK you can voluntarily register for VAT, claim the VAT back, and sell the bitcoins without charging VAT (because they are now VAT exempt).  You'd have to research that one a bit

Adam

[Collider]

Yes they are easy to set up, basically plug-and-play.

Any bitcoin hosting datacenter will manage to do it without instructions and you can also do it yourself without specific mining knowledge.

Again, just pm me your local power rate and I can work out if hosting would in fact be cheaper.


The difficulty isn´t setting the unit up, it is having a pretty much dedicated site where higher noise levels 24/7 will not hinder anyone from sleeping and it doesn´t get stolen.
The sp30 is datacenter-optimised and as such will be quite cheap to host.

There are other miners on the market that are better suited for home deployment, but they are generally not as power-efficient as the sp30.

[jtoomim]

I stated that it is possible (and quite an achievement actually) to cool full racks of sp30s with free air-cooling, so why are you arguing with me?

I didn't mean to be confrontational or adversarial. I just think that free air cooling is cheaper and more capable than you do, and thought you and others would find it helpful if I explained why.

Also, I want to go further than 60 kW. If people think it can't be done, or if they think there's no reason for it to be done, then it won't be. If Spondoolies or someone else can build the load, then I can cool and power it.

I think it would be quite impractical to do even higher densities, as space would be cheaper than the added cooling (aka airflow) on a small area.

It might be possible to achieve even more than 60kW per rack, but nobody needs to do it right now, so why do it?

Space is cheap, but electrical wiring and air ducting are not cheap. I've been writing a lot of five-digit checks for electrical equipment and work recently. Electrical work cost is related to the number of separate connections that need to be made and the number of meters of distance of wiring that needs to be done.If you need to bring power into a lot of different places over a large area of your building, that ends up costing a lot more than bringing a lot of power into one very small place. (This is actually the main reason why I don't want to deal with Antminers right now.)

[bitcoiner23]

Is there any P2Pool near the US and or Spondoolies own DC?
It would be awesome if Spondoolies setup an own P2Pool inhouse with very low latency for the hosted miners!

[RealMalatesta]

Aaarghh... anybody noticed the rise of the hash rate during the last 24 hours. This is really frightening. Spondoolies: Could you please make sure that September starts  tomorrow :-)

[Collider]

Is there any P2Pool near the US and or Spondoolies own DC?
It would be awesome if Spondoolies setup an own P2Pool inhouse with very low latency for the hosted miners!

Yes, that would be awesome and I suggested it to Zvi.

He apparrently didn´t have enough time to do a quick setup of a p2pool server or did not want to do it.

I would also not recommend you hosting your sp30 at spondoolies own DC for an extended time, as it is quite pricy (as power in Israel isn´t cheap).

[wh00per]

I'm wondering if anyone happened to read this ..

http://docs.oracle.com/cd/E19065-01/servers.e25k/805-5863-13/805-5863-13.pdf

[Biffa]

Aaarghh... anybody noticed the rise of the hash rate during the last 24 hours. This is really frightening. Spondoolies: Could you please make sure that September starts  tomorrow :-)

Looks like someone was waiting for the difficulty change before turning on a few PH

[Collider]

Aaarghh... anybody noticed the rise of the hash rate during the last 24 hours. This is really frightening. Spondoolies: Could you please make sure that September starts  tomorrow :-)

Looks like someone was waiting for the difficulty change before turning on a few PH

Part of it could be statistical variance.

We can wait until 2-3 days before the next change and discuss this, as anything right now would be pure speculation.

[Marvell1]

Hi There,

I'm new to Bitcoin mining. I ordered a unit from China but it came with many faults to i'm returning it and looking to get the new SP30. I have a few questions which I e-mailed directly to the company but received no reply. Would anyone help me with the following questions.

- If I ordered the item next week would you still ship the item to me in September?
- Do you accept bank wire payment from London
- How is the on-going support if there are any damages while shipping the item to London
I'm asking this because I had a miner shipped from China which came damaged and then could not refund the item.
- Can I plug the miner into the normal UK power supply? 240v? Or will I need a step down transformer?
- Does the item come with warranty?
- What is the cost of the duty when the item arrives in London?
- How long will it take for the SP30 to come to London?
- If there are any faults after delivered will you take the item back under your own shipping costs and repair the item and send it back all inclusive?
- Finally when I go into the payment section it's asking whether I want hosting too? What is this hosting for?

Sorry for the overload of questions. I just want to be clear before jumping into this investment.

Thanks,
Charles

I think its too risky to order the Sept batch right now because you would not get your units till near Oct
Only a few Aug batch units have shipped and its a quarter of a way through the Month which means Aug batch won't be shipped till almost Sept imo.  Diff seems to be going up already so Sept batch could be very risky

[jtoomim]

using a gas with higher thermal conductivity than air?

It's true that moving the heat from the ASIC to the air is an interesting problem, and the current heatsink and gas combination will struggle to transfer heat to air in that much space at that power rate with that small of a temperature difference between the ASIC and the air. However, doing things the traditional way is boring. I'll just leave this here for you guys.

http://www.frostytech.com/articleview.cfm?articleID=2722
http://gizmodo.com/5920224/brilliant-spinning-heatsink-cools-cpus-30-times-more-efficiently
http://www.youtube.com/watch?v=JWQZNXEKkaU
https://ip.sandia.gov/techpdfs/Fundamentally%20New%20Approach.pdf

Thermal resistance is about 0.2°C/W, about 1/4 of a typical heatsink+fan setup.

[jtoomim]

Is there any P2Pool near the US and or Spondoolies own DC?
It would be awesome if Spondoolies setup an own P2Pool inhouse with very low latency for the hosted miners!

We will be hosting a p2pool node soon. It should be up in about two weeks, I'd guess. Our latency to Titan, the DC that Spondoolies uses in central Washington, will probably be about 5 ms.

<shameless plug>
Of course, if you hosted with us too, then your latency would be under 1 ms, and you'd pay less money on hosting fees.
</shameless>

[DevonMiner]

One of my SP10s which is hosted in Iceland is unfortunately down, as the PSU has burnt out. It went down a couple of days ago, at first I could still access the miner, but couldn't get it to start mining again. Remo from Spondoolies kindly had a look for me and confirmed the voltages weren't right which is why it wouldn't mine. After a couple of hard resets, things were no better.

The last reset was a reset too far, and the tech emailed me saying: "There is definitely something wrong with the power supply i think it has burned out. I unpluged the server and plugged it back in and then a strange smell and a little smoke from the server, so i have unplugged it for now".

They even emailed me a picture which I thought was quite good of them.

Anyway ... has anybody else had a PSU go down? I'm not sure how to proceed, but await to see what advice Spondoolies give.

[Collider]

One of my SP10s which is hosted in Iceland is unfortunately down, as the PSU has burnt out. It went down a couple of days ago, at first I could still access the miner, but couldn't get it to start mining again. Remo from Spondoolies kindly had a look for me and confirmed the voltages weren't right which is why it wouldn't mine. After a couple of hard resets, things were no better.

The last reset was a reset too far, and the tech emailed me saying: "There is definitely something wrong with the power supply i think it has burned out. I unpluged the server and plugged it back in and then a strange smell and a little smoke from the server, so i have unplugged it for now".

They even emailed me a picture which I thought was quite good of them.

Anyway ... has anybody else had a PSU go down? I'm not sure how to proceed, but await to see what advice Spondoolies give.

If within 3 months from buying they will send you a new PSU for free (to the DC).

Alternatively, you could buy a used PSU for around 40$, but please check with spondoolies before doing that, as I am not sure whether it would void your remaining warranty.

[DevonMiner]

If within 3 months from buying they will send you a new PSU for free (to the DC).

I was hoping this would be the case, Spondoolies shipped my orders on 13th May so all should be OK.

[Collider]

If within 3 months from buying they will send you a new PSU for free (to the DC).

I was hoping this would be the case, Spondoolies shipped my orders on 13th May so all should be OK.

Just make sure you actually send them an email (and get an automated message back that your ticket was received), ideally with your order number and "PSU failure" in the subject of your email.

You can also upload the picture of the burnt-out PSU and link to it in your email, it should accelerate the process.

[DevonMiner]

Thanks Collider, already done ... I await a response from them.


EDIT: In true Spondoolies fashion, I have received a quick reply from Guy who has confirmed they will replace the PSU and send it directly to the DC. They even want the burnt out one back so they can analyse it.

Thank you again Spondoolies for an excellent service, I have nothing but praise for the timely support I have received today, and in the past.

[Biodom]

Thanks Collider, already done ... I await a response from them.


EDIT: In true Spondoolies fashion, I have received a quick reply from Guy who has confirmed they will replace the PSU and send it directly to the DC. They even want the burnt out one back so they can analyse it.

Thank you again Spondoolies for an excellent service, I have nothing but praise for the timely support I have received today, and in the past.

wow, this is excellent, i hope that it will continue into the fall...have doubts about the robustness of PSU "learning" procedure because of high temp variability in most hosting sites.

[Collider]

wow, this is excellent, i hope that it will continue into the fall...have doubts about the robustness of PSU "learning" procedure because of high temp variability in most hosting sites.

I can tell you that my Sp30 doesn´t show the initial (very short) resets anymore, so the learning seems to work quite well.

It is basically only discovering the highest thermal stress the PSU can take at the current settings, and limits itself to the maximum stable current.


You might therefore be able to achieve a small increase in performance in a cold hosting environment, but the overall impact of temperature on hashrate should be even lower than on the sp10s.