Topic: [ANN] Spondoolies-Tech - carrier grade, data center ready mining rigs - page 651. (Read 1260389 times)

What about 'No ROI for 200 days' don't you understand ?

Did you try it with an S1? Or S2? Or maybe a Dragon?

Lets inject some reality into this discussion. When I plug the following numbers into the bitcoinwisdom mining profitability calculator, I recover my initial investment after 200 days. In another month, I've made 50 bucks ...

SP30: 6THs, $4500 cost, 0% pool fee, 0 maintenance cost, 15% difficulty increase, $0.1 USD kWh. 2500W, start in 90 days

"The work required to produce one watt of power for one second, or one "watt second" (W·s) (compare kilowatt hour). This relationship can be used to define the watt."

http://en.wikipedia.org/wiki/Joule

It's the proper way to compare power consumption, but is equivalent to watts/gh/s.

I'm using 30 gold rated psus. Mostly rosewill capstone 550w, but a few corsair rm550w. They were $74 shipped and I paid with bitcoin through amazon. Likely I will just sell them with the rigs when I get ready to part with them. Haven't had one give out yet and it's been over a month. Nice and cool on 220v.

He was describing how to setup his 30 S1, irrelevant to the thread.

Also, Spondoolies is great. Why not to mention?

 

Handwaving is no substitute for real numbers. FWIW, the most important thing to me is that I have a reasonable expectation that when I invest thousands of dollars in the ST group buy, that I have a hope in hell of getting it back, plus some.

To the chase: profitability calculators are always right. The assumptions with respect to BTC price and difficulty growth that you enter into the calculator may or may not be right, but you need to state the assumptions clearly before we, your potential customers, can decide how reasonable they are.

That's what my group buy offers Thank you for your common sense.


I thought we are comparing 1.7j/gh to 0.5j/gh (not sure how joules are related to watts but i'm assuming they are close). The 1.2j/gh are the Jupiters which i plan to sell How many PSUs are you using for 30 S1 miners? Those must have a big cost comparing to the miner.


My view exactly. Also considering that i plan to host them in the WA DC makes my life much easier. I still have burnin's boards in my living room and i got used with the sound, but the future is without headache in a DC, not at home.

Like it or not, the future is to have less electric consumption

Go buy 1000 S1s, and come back in two months from now.

They will become like the usb miners. Useless.

Sp30 looks a fine machine. That is sure.

But where is the crystal ball to see the future?

If they will sell of the shelf and I can see max 80 days roi then SOME profit with cheap electricity i would buy a lot.

But the case is not that....

I do hope you're kidding, you seem like an intelligent poster. Power consumption is largely irrelevant at this point, unless your power rates are enormous, in which case you'll be pushed out of btc mining anyway. By the time power consumption is relevant the difference between 1.7j/gh and 1.2j/gh won't mean much. Gold rated psus or server psus can be had dirt cheap and cables are made for fractions of a penny/yard.

I fail to see how conversing limits anyone's choice.

Has a profitability calculator ever been right?

I think the most important thing is to have the cheapest $/gh and most efficient miner w/gh and you should profit. But nobody knows how the sp30 will actually perform and what it will be up against when it finally ships.

I asked him


You have astronomical power costs imo. 30 S1 need how much power? 12kW? 10kW? And you get how much hashrate? 5400GH/s? A single SP30 will do more than your setup with only 2700W required. Not to mention all the PSUs, cables and stuff and more parts that could break than in the SP30. You made your choice. Good luck with that, but let other people make their own choice.

RoadStress, I appreciate you trying to address these concerns intelligently.

With respect to the power efficiency issue, of course a 5TH farm which requires 5kWh will use twice as much electricity as a 5TH farm which uses 2.5kWh. When both farms get to the point on the difficulty/btc price curve where the 5kWh farm can't cover its operating costs by mining bitcoin, the 2.5kWh farm will be making so little money that it won't matter. At the end of the life of both of these farms, profitability will be negligible. The important question to ask is whether either of these farms has recovered their capital expenses and has made a profit  commensurate with the risk they took.

So, would you mind publishing some common-sense numbers we can all plug into the bitcoinwisdom mining profitability calculator that show a reasonable return on your SP30 group buy ?

Forgive me if I'm barking up the wrong tree

In dogies review there were lots of mentions of 1250W for 1.3GH and a chart for power draw at the wall



All I meant is that its not like we are saying that SPT is half the power consumption currently compared to the competition, they are good, but everyone is snapping at each others heels.

I hope its alot better for SP30 but expect it to be somewhere inbetween in the end.

@kendog77 let's talk in September. You tell me your hashrate and power consumption and i will tell you my hashrate and my power consumption.


SP10 is 0.82W/GH if you measure it by 1400GH (1150W for this speed) Why do you say it's 1W/GH? What is the power draw for Dragonminers? S2 does 1W/GH and comes in pieces. KnC Jupiters are 1.1-1.2W/GH. Only Bitfury can achieve 0.8 or maybe 0.7W/GH. As said before I invite you and everyone to just buy one single unit so that they can compare themselves the quality of the products. Can't afford or don't want to buy a pre-order unit? Just buy one SP10 and you will see the difference.


HashFail is run by Eduardo who is reminding me of Josh Zerlan. Check Eduardo's background and you will see and understand why they failed so much. SP-Tech have 2 VCs companies that overlook every move they make. It's not the same thing. Stop comparing apples with oranges!


If you think power consumption matters as much as 2 dollars per day then what can i say to you? Imagine having 2 farms both hashing at 5TH. One farm needs 5kW and one farm needs 2.5kW. Which one do you think it will last longer? Also take into consideration that besides small miners there are some big miners too. Big miners will need to pay an extra ~30% more on their power bill for keeping their units cool enough. Paying 30% more out of 5kW is something and paying 30% more out of 2.5kW is another thing. If your power bill is 10k$ you need to pay additional 3k$. That matters!

My estimates of getting a fiat ROI on the SP30 units is around 2-3 months. Of course it's very exchange rate dependent (meaning that if btc goes to 100$ then you won't get a fiat roi in 3 months) and also difficulty dependent, but that comes into second place since i don't think it will rise with 20% all the time like everyone is thinking. (last diff adjust was only 14% and the next one seems to be around 15%).


Then why not buy a lot of them right now? It seems that you are only wishing for hashing machines, but you don't seem to either have the money or the guts to really act like you say. Post pics when you get them before you start assembling them.

Relaxed thanks. Think I'll take bitmain for 1310/Th shipped within 48hrs. Though if spondoolies could guarantee shipping within 48hrs I'd consider them even at a higher price.

2 weeks from now.

Relax.

The real beneficiaries of power efficiency are the large datacenters who have to worry about hashpower density in racks with fixed power budgets.

Bingo. People with astronomical power costs will be forced out of btc mining first anyway. Tiny efficiency differences won't matter on the final tally.


Sounds sweet. When is it delivered?

Agreed, power efficiency is overrated unless there is a dramatic difference.

At 12 cents per kilowatt hour, a 1TH miner that uses 1W/GH (1000 Watts) will use $87.60 in electricity per month. A more efficient miner that uses .75W/GH will use $65.70 in electricity per month, so you're looking at savings of $262.80 per year. Given that most miners won't be running after 12 months, marginally more efficient miners (comparing a Dragon to a SP10, for example) should certainly not command a huge price premium. People tend to overpay for power efficiency without taking the time to do the math.