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Author Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs  (Read 1256101 times)
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jamesg
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August 12, 2014, 11:38:25 AM
 #5561

that is unless the bitcoin price increases dramatically of course.

Or we have a prolonged bear market (2011) and prices revisit levels not seen since april 2013.  Shocked
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August 12, 2014, 12:16:41 PM
 #5562

am i missing something here? can't find any possibility of positive ROI

No.
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August 12, 2014, 01:14:00 PM
 #5563

I'd love to know at what point it becomes uneconomical  for the corporates currently piling in and they pull the plug.
I imagine small miners have more endurance for making losses than they do, not that it helps right now...
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August 12, 2014, 01:18:34 PM
 #5564

I still want a unit. Just can't buy one right now.

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August 12, 2014, 03:17:39 PM
 #5565


... You know they have to figure that most of the income from miners comes in the first 3 months....

That was true while the difficulty was raising fast and HW was getting cheaper fast. It will not be lake that from the autumn. It will be longer ROI.
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August 12, 2014, 03:19:50 PM
 #5566

I'd love to know at what point it becomes uneconomical  for the corporates currently piling in and they pull the plug.
I imagine small miners have more endurance for making losses than they do, not that it helps right now...

when the price crashed to around 400s difficulty really flattened for a while we need another crash or two to put these corporates underwater and get their loans due lol

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August 12, 2014, 04:28:32 PM
 #5567

It looks like newest Bitfury's DC has got probably 30 PH not 20 PH as it was claimed.
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August 12, 2014, 04:32:06 PM
 #5568

It looks like newest Bitfury's DC has got probably 30 PH not 20 PH as it was claimed.

Source?
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August 12, 2014, 04:48:00 PM
 #5569

Collider, jtoomim, Roadsress or anyone with the early machines:

Please post your statistics and whether you achieved sustained ~4.5TH at 208-220V (please post your voltage) and what was the speed at 110/120V if applicable (I assume 4.1Th). Thanks.



I'm getting just under 4.4Th/s @ 205v/205v    
Input temp is 19C

Hoping to tweak a little more and get it up to 4.5, any suggestions (other than what ive already read in this thread, and tried)?

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August 12, 2014, 05:50:34 PM
 #5570

I'd love to know at what point it becomes uneconomical  for the corporates currently piling in and they pull the plug.
I imagine small miners have more endurance for making losses than they do, not that it helps right now...
There is a VERY large difference between sunk costs and new capacity.
We are still running avalons from batch 1 and 2.   Would we buy another one of those?  No.
But as long as the money returned from mining is more than 1.25X the cost of mining, you would keep a machine operating.  But you would never buy a new machine.   Personally, I would not buy a new machine if I thought it would take more than 100 days to return the capital from the purchase (at bitcoin's vol, you would be crazy to -- buy the coins if you just want to speculate on bitcoin price, the optionality you gain by the liquidity in coins vs. pre-ordering a coin maker is worth a fortune).

So, let's focus on the question of when do you shut down an IN HAND SP10?   You can solve for this but there are two variables that affect the answer.   Difficulty and price (and they counteract each other).   Electric price is there too but that is known (it varies for many people but is known for the user).
Why do I not include 'rent'?  Because the cost is 'SUNK'.   Most people have leased the building and will have to pay it whether the machines are on or off.    Sunk costs are not used to determine what you would do on a variable basis, only the costs that can be eliminated are.

I will use 5 cent per kWh electric since that will allow people to extrapolate for residential and for the people that host in data centers and likely pay around 20 cents total.

Cost of operating 1 SP10 = 1.2kW X 12 days x 24 hours x $0.05 = $17.28 per difficulty adjustment.
So, you should turn this machine OFF when the risk of returning profit gets too high (because the $17.28 is FIXED and will have to be paid if it runs).   I would turn off when the machine produces only $17.28 X 1.25 = $21.60 of bitcoin produced.
To solve for difficulty, let's use $400 as the bitcoin exchange rate.
$400 btc = 21.60/400 = 0.054 bitcoin.
Bitcoin produced in the difficulty period = 43,200
Share of the network required to produce 0.054 bitcoin = 0.054 / 43,200 = 0.00000125
How large would the network need to be to turn the SP10 OFF?  1.4 TH/s / 0.00000125 = 1,120,000 TH/s




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August 12, 2014, 05:54:48 PM
 #5571

Collider, jtoomim, Roadsress or anyone with the early machines:

Please post your statistics and whether you achieved sustained ~4.5TH at 208-220V (please post your voltage) and what was the speed at 110/120V if applicable (I assume 4.1Th). Thanks.



I'm getting just under 4.4Th/s @ 205v/205v    
Input temp is 19C

Hoping to tweak a little more and get it up to 4.5, any suggestions (other than what ive already read in this thread, and tried)?


Please contact zvi@ for a possible tweaking. Zvisha is still tuning the firmware.

New Mimblewimble implementation: https://www.beam.mw
Spondoolies is back with the SPx36: https://www.spondoolies-tech.com/products/spx36
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August 12, 2014, 06:11:25 PM
Last edit: August 12, 2014, 06:27:09 PM by zvisha
 #5572

Collider, jtoomim, Roadsress or anyone with the early machines:

Please post your statistics and whether you achieved sustained ~4.5TH at 208-220V (please post your voltage) and what was the speed at 110/120V if applicable (I assume 4.1Th). Thanks.



I'm getting just under 4.4Th/s @ 205v/205v    
Input temp is 19C

Hoping to tweak a little more and get it up to 4.5, any suggestions (other than what ive already read in this thread, and tried)?


Please contact zvi@ for a possible tweaking. Zvisha is still tuning the firmware.

Under 210V we can not pull more then 1250watt from the Emerson because of the FCC limitations on current in wires.  
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August 12, 2014, 06:14:50 PM
 #5573

Do I get a discount?
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August 12, 2014, 06:17:47 PM
 #5574

Collider, jtoomim, Roadsress or anyone with the early machines:

Please post your statistics and whether you achieved sustained ~4.5TH at 208-220V (please post your voltage) and what was the speed at 110/120V if applicable (I assume 4.1Th). Thanks.



I'm getting just under 4.4Th/s @ 205v/205v    
Input temp is 19C

Hoping to tweak a little more and get it up to 4.5, any suggestions (other than what ive already read in this thread, and tried)?


Please contact zvi@ for a possible tweaking. Zvisha is still tuning the firmware.

Up to 210V we can not pull more then 1250watt from the Emerson because of the FCC limitations on current in wires. 

BTW, some people here successfully hacked the FW to ignore the FCC limits, and get slightly better performance from the miner, but that voids the warranty and very dangerous if you don't know what you are doing Smiley  I am not sure it is worth the 100GH.
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August 12, 2014, 06:26:09 PM
 #5575

Up to 210V we can not pull more then 1250watt from the Emerson because of the FCC limitations on current in wires. 
Whose limitation? FCC? It stands for Federal Communication Commission and deals with radio-communication interference.

Could you please look up the actual source authority for the limitation you're mentioning?

Please comment, critique, criticize or ridicule BIP 2112: https://bitcointalk.org/index.php?topic=54382.0
Long-term mining prognosis: https://bitcointalk.org/index.php?topic=91101.0
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August 12, 2014, 06:31:19 PM
 #5576

Up to 210V we can not pull more then 1250watt from the Emerson because of the FCC limitations on current in wires. 
Whose limitation? FCC? It stands for Federal Communication Commission and deals with radio-communication interference.

Could you please look up the actual source authority for the limitation you're mentioning?



We work with FCC lab that provide us the FCC compliance. I get the requirements in form of document from our HW team, which is called FCC compliance document, so I call all those limitations FCC compliance limitations.

I for sure did not read all the documents that we need for safety compliance, and have no idea where they come from. I will try and check with HW team where this limitation is from.
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August 12, 2014, 06:50:41 PM
Last edit: August 12, 2014, 07:13:36 PM by 2112
 #5577

We work with FCC lab that provide us the FCC compliance. I get the requirements in form of document from our HW team, which is called FCC compliance document, so I call all those limitations FCC compliance limitations.

I for sure did not read all the documents that we need for safety compliance, and have no idea where they come from. I will try and check with HW team where this limitation is from.
Please do look it up. FCC regulations would deal with the things like harmonic emissions from the cables, which could be easily solved by a ferrite choke clamped on them.

In the past I've dealt with the fake/scummy/incompetent "electromagnetic compatibility" labs/inspectors, but never heard of one in Israel.

FCC is a fairly weak organization, as far as "the Feds" go. In the past some enterprising scammers even set up fake "RF emission labs" in an acoustic anechoic chamber that was sufficient to confuse inexperienced people and scam them out of payments for "expert evaluations" that were nearly worthless. In USA this is called "private enterprise" and "public/private partnership".

Edit: Are you by chance dealing with a remote "mail delivery only" lab in the USA, where nobody knowledgeable from your company ever visits the actual lab?

Please comment, critique, criticize or ridicule BIP 2112: https://bitcointalk.org/index.php?topic=54382.0
Long-term mining prognosis: https://bitcointalk.org/index.php?topic=91101.0
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August 12, 2014, 07:02:55 PM
 #5578

It looks like newest Bitfury's DC has got probably 30 PH not 20 PH as it was claimed.

Source?

Google.com
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August 12, 2014, 07:08:47 PM
 #5579

It looks like newest Bitfury's DC has got probably 30 PH not 20 PH as it was claimed.

Source?

Google.com

So no source?
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August 12, 2014, 07:23:27 PM
 #5580

We work with FCC lab that provide us the FCC compliance. I get the requirements in form of document from our HW team, which is called FCC compliance document, so I call all those limitations FCC compliance limitations.

I for sure did not read all the documents that we need for safety compliance, and have no idea where they come from. I will try and check with HW team where this limitation is from.
Please do look it up. FCC regulations would deal with the things like harmonic emissions from the cables, which could be easily solved by a ferrite choke clamped on them.

In the past I've dealt with the fake/scummy/incompetent "electromagnetic compatibility" labs/inspectors, but never heard of one in Israel.

FCC is a fairly weak organization, as far as "the Feds" go. In the past some enterprising scammers even set up fake "RF emission labs" in an acoustic anechoic chamber that was sufficient to confuse inexperienced people and scam them out of payments for "expert evaluations" that were nearly worthless. In USA this is called "private enterprise" and "public/private partnership".

Edit: Are you by chance dealing with a remote "mail delivery only" lab in the USA, where nobody knowledgeable from your company ever visits the actual lab?


No, the lab is in Israel. I am actually flying on a 3 day vacation tonight, but we will check this. It's in our interest to provide as much hashing as possible to every voltage.
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