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Author Topic: Block Erupter Prisma (>=1.4 T/device, 0.75-0.78 W/G, <1 BTC/T, October Shipping)  (Read 107596 times)
vortexz
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September 22, 2014, 09:51:08 AM
 #21

buying BTC sounds much better.
why bother pay 14.9 BTC for these when they can only produce like 9-10 BTC ?
plus I need PSUs to run them, plus I have to pay 24 % import tax, plus i need space etc etc.
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jimmothy
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September 22, 2014, 10:07:39 AM
 #22

why bother pay 14.9 BTC for these when they can only produce like 9-10 BTC ?

So I take it you have a magic crystal ball too?

Mine says these can easily break even with cheap electricity.
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September 22, 2014, 10:12:59 AM
 #23

why bother pay 14.9 BTC for these when they can only produce like 9-10 BTC ?

So I take it you have a magic crystal ball too?

Mine says these can easily break even with cheap electricity.

How many days for ROI with what electricity price?

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September 22, 2014, 10:26:58 AM
 #24

Looks like this is pre-order and it is shipping october mid? Seems not profitable for me Sad

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September 22, 2014, 10:27:34 AM
Last edit: September 22, 2014, 10:39:00 AM by yslyung
 #25

pictures, want to some see pix ! show some ASIC porn . . . here comes the ASIC race.

1 btc for shipping is too EXPENSIVE (400+/-) for shipping ? normally about 200USD. Please revise shipping rates.

also guys pls do not forget to add in psu cost to run these. i'm sure pricing can be reviewed.

FC you can do much better !

here are some of my broken math :

10 devices + shipping will be 14.9btc = USD 6013 (Preev rates as of now)

1 full device consumes approx. 1100w (conservative) so you will need a 1200w psu which costs approx. USD 200 each so x 10 = USD 2000 (excluding spares)

so for 14TH total costs to run is roughly USD 8013 excluding any exchange rate fees so round up to USD 8100 by the time it reaches your door step & that does not include any DOA's & RMA's issues.

10 full devices will be a jungle of spaghetti wires. looking to see some new design & improvements to eliminate the jungle of wires.
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September 22, 2014, 10:35:21 AM
Last edit: September 22, 2014, 10:56:32 AM by jimmothy
 #26

pictures, want to see pix ! show some ASIC porn . . . here comes the race.

Agreed.

Quote
1 btc for shipping is too EXPENSIVE (400+/-) for shipping ? normally about 200USD. Please revise shipping rates. also guys pls do not forget to add in psu cost to run these. i'm sure pricing can be reviewed. FC you can do much better !

$400 to ship 75KG is actually pretty inexpensive.

Quote
1 full device consumes approx. 1100w (conservative) so you will need a 1200w psu which costs approx. USD 200 each so x 10 = USD 2000 (excluding spares)

It draws 1000W from the psu. 1100W is at the wall.

You could buy the most expensive ATX psu or you could use a modded server psu for ~$25/1000W.

Quote
10 full devices will be a jungle of spaghetti wires. looking to see some new design & improvements to eliminate the jungle of wires.

The boards are already chainable, what more can they do? They only need 1 controller per 32 boards and there's really nothing they can do about the power cables.
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September 22, 2014, 11:32:28 AM
 #27

The ethernet controller is the same of the Tube ?

You have a new firmware ?
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September 22, 2014, 11:41:21 AM
 #28

The ethernet controller is the same of the Tube ?  You have a new firmware ?

...

The fixing of custom ethernet controllers' problem is still under way though.

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September 22, 2014, 01:22:49 PM
 #29

Looks like this is pre-order and it is shipping october mid? Seems not profitable for me Sad
What part of it suggests it's pre order?
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September 22, 2014, 01:38:25 PM
 #30

$400 to ship 75KG is actually pretty inexpensive.

So when will the devices ROI?

why bother pay 14.9 BTC for these when they can only produce like 9-10 BTC ?

So I take it you have a magic crystal ball too?

Mine says these can easily break even with cheap electricity.

How many days for ROI with what electricity price?

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September 22, 2014, 01:49:16 PM
 #31

So when will the devices ROI?

Faster than any other asic on the market by far.
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September 22, 2014, 02:05:16 PM
 #32

So when will the devices ROI?

Faster than any other asic on the market by far.

Why not share some of your magic crystal ball numbers? Why not back up your statement with something? We can all start throwing with statements. For example I state that these devices will not ROI. Prove me I am wrong.

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vortexz
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September 22, 2014, 02:25:39 PM
 #33

why bother pay 14.9 BTC for these when they can only produce like 9-10 BTC ?

So I take it you have a magic crystal ball too?

Mine says these can easily break even with cheap electricity.

lol, you are a joke

even with free electricity they won't ROI.remember they will start shipping in at least 2 weeks from now, you need to pay import tax in your country,and you also have to buy PSUs, cables etc.
you have all these for free ?

let's run a small simulation assuming everything will be in our favor, the small miner:



-only 15 % diff increase (which we all know will be much higher)
-14 TH/S
-free electricity

you will still be in a negative -7.7 BTC in more than 1 year from now on.after 1 year 14 th/s will be worthless
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September 22, 2014, 02:27:08 PM
Last edit: September 22, 2014, 03:06:06 PM by jimmothy
 #34

So when will the devices ROI?

Faster than any other asic on the market by far.

Why not share some of your magic crystal ball numbers? Why not back up your statement with something? We can all start throwing with statements. For example I state that these devices will not ROI. Prove me I am wrong.

Sorry but I paid good money for my magic crystal ball and I'm not about to give away prophecies for free.

But anyways here's a scenario where these could turn a profit: http://btcinvest.net/en/bitcoin-mining-profit-calculator.php?diff=29829733124&dcosts=650&diff_mincrease=15&blpbtc=25&dhsmhs=1480000&diff_mincreasedecrease=4&btcusd=400.11&dpowcon=1100&btcusd_mincrease=2&pcost=0.05&calcweeks=32&dleadtime=2&action=calc*

*Disclaimer: guaranteed to be inaccurate.
vortexz
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September 22, 2014, 02:35:20 PM
 #35

like I said you are a joke
what kind of scenario is that ? 6-7 % diff increase ? are you dreaming ?
wait till you see a 20-25 % diff increase !
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September 22, 2014, 02:46:22 PM
 #36

So when will the devices ROI?

Faster than any other asic on the market by far.

Why not share some of your magic crystal ball numbers? Why not back up your statement with something? We can all start throwing with statements. For example I state that these devices will not ROI. Prove me I am wrong.

Sorry but I paid good money for my magic crystal ball and I'm not about to give away prophecies for free.

But anyways here's a scenario where these could turn a profit: http://btcinvest.net/en/bitcoin-mining-profit-calculator.php?diff=29829733124&dcosts=650&diff_mincrease=15&blpbtc=25&dhsmhs=1480000&diff_mincreasedecrease=4&btcusd=400.11&dpowcon=1100&btcusd_mincrease=2&pcost=0.05&calcweeks=32&dleadtime=2&action=calc

Lol @ .
Lrn 2 unit of account, ur paying in BTC, not $$ Cheesy
vortexz
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September 22, 2014, 02:48:15 PM
 #37

this guy must be very dumb or be working for friedcat.  Grin Grin Grin
which one is it ?
TheRealSteve
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September 22, 2014, 03:02:04 PM
 #38

Sorry but I paid good money for my magic crystal ball and I'm not about to give away prophecies for free.

But anyways here's a scenario where these could turn a profit: http://btcinvest.net/en/bitcoin-mining-profit-calculator.php?diff=29829733124&dcosts=650&diff_mincrease=15&blpbtc=25&dhsmhs=1480000&diff_mincreasedecrease=4&btcusd=400.11&dpowcon=1100&btcusd_mincrease=2&pcost=0.05&calcweeks=32&dleadtime=2&action=calc

I think your first line is far closer to the truth of any ROI calculations than the link Smiley

Nobody knows how long it'll take for these to ROI (if ever) simply because nobody knows what's going to happen to USD/BTC exchange (if calculating ROI by fiat), nor the difficulty (if calculating ROI by either fiat or BTC).

But with the link in place, which is a highly optimistic estimate, there's specifically the issue of the difficulty.  Right now it suggests break even by 2015/06/13.  However, the next difficulty jump is in just 3 days.. (which is probably about as fast as you could get these sent your way if they even shipped right now), so click the 'next estimate' button, re-calculate, and hey presto... no more break even.

Additionally, if you bought $650 worth of Bitcoin right now at ~$400/BTC, you'd get 1.625BTC.  According to the original calculation, it fizzles out after 2015/12/10, having given 2.44433BTC in revenue, or 0.81933BTC profit.  At that time, the exchange is $833/BTC, so fiat profit would be $682.50.  On the other hand, that 1.625BTC would at that time be worth $1,353, giving a $703.60 profit.
( It's actually a bit worse for the harware, as this excludes operating costs. )

So not only does that scenario seem doomed to fail due to the realities of the impending difficulty increase, it's doomed to fail because you'd be better off buying and holding the BTC.

As much fun as these calculators are for giving lower/upper bounds based on some numbers one plugs in, they're still inferior to a proper crystal ball  Wink

( The above is not a commentary on whether or not these will ROI - I'm with jimmothy on that one, get your own crystal ball. )

this guy must be very dumb or be working for friedcat.  Grin  which one is it ?
Neither - he's just handing out a healthy dose of reality; people asking about ROI need to do their own calculations/guesstimates.  His initial statement holds true, regardless... even if it never ROIs, it never ROIs faster than anything else out there due to the favorable price/GHash and W/Ghash.  Or is that slower... hmm.. brainhurt.

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September 22, 2014, 03:04:31 PM
 #39

why bother pay 14.9 BTC for these when they can only produce like 9-10 BTC ?

So I take it you have a magic crystal ball too?

Mine says these can easily break even with cheap electricity.

lol, you are a joke

even with free electricity they won't ROI.remember they will start shipping in at least 2 weeks from now, you need to pay import tax in your country,and you also have to buy PSUs, cables etc.
you have all these for free ?

If you have to pay 25% import tax you are automatically disqualified from mining, sorry I had to break the news to you. And yes many people have free psus/cables but you can always buy cheap server psus for $25/kw.

Quote
let's run a small simulation assuming everything will be in our favor, the small miner:



-only 15 % diff increase (which we all know will be much higher)
-14 TH/S
-free electricity

you will still be in a negative -7.7 BTC in more than 1 year from now on.after 1 year 14 th/s will be worthless

If you've been following the difficulty you would know that the growth rate is slowing down not increasing and it's less than 15% average. The low btc rate will only add to the slowing.

Even in your unrealistic scenario where difficulty growth stays constant at 15% you can still ROI because the actual price of the 14TH is clearly 15btc not 23btc.
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September 22, 2014, 03:06:28 PM
 #40

These look cool and all, and the Prisma seem to be a more efficient miner than the original Tubes.

All that said, I'm with the others on this one, doesn't seem to be any ROI in sight unless these somehow ship this week, not in October.

Either way, well done FC/AM for continuing to tweak and pump out these new designs at decent rates.  The 14 BTC for the 14 TH/s will never return that amount back(difficulty, PSU costs, import tax costs, shipping costs, cabling costs, cooling/electrical costs etc), but at least they're giving miners a good buying option compared to BFL, KNC, BA, AMT, Cointerra etc.
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