Wrong calculations?

[armazingerz]

There should be some mistake in my calculations, but I don't know where:
http://imgur.com/a/FwfI3

It's a 40k euros investment in 25 rigs of 6 RX 470 each one. I have tested one RX 470 at 167 Sol/s

The yearly expected profit says almost 400k euros, it has to be mistaken, but I don't know why, can somebody explain me please? What can I really expect?

Thanks!

[eckmar]

I don't really know what you did wrong but it's mistake definitely. So you say 25 rigs of 6 RX 470 each. That is total of 150 graphics cards. If you say one is 167 sols/s that is total of 25050 sols/s. If you calculated your power draw correctly you should make your investment back in 229.03 Days and you should make $67,484.79 profit per yer (i converted your eurs to usd). I got that data from whattomine. Just input data you provided to us and it should be right

[armazingerz]

I don't really know what you did wrong but it's mistake definitely. So you say 25 rigs of 6 RX 470 each. That is total of 150 graphics cards. If you say one is 167 sols/s that is total of 25050 sols/s. If you calculated your power draw correctly you should make your investment back in 229.03 Days and you should make $67,484.79 profit per yer (i converted your eurs to usd). I got that data from whattomine. Just input data you provided to us and it should be right

Now I realize there's a huge difference between the daily and the monthly profit because there is a peak in the reward graph on 31 October (bottom left graph in the picture http://imgur.com/a/FwfI3), so I guess yearly expected profit may be based on last month profit. But, would it be accurate if there would be this kind of peaks once a month? How often does it really happen?

[Marvell1]

There should be some mistake in my calculations, but I don't know where:
http://imgur.com/a/FwfI3

It's a 40k euros investment in 25 rigs of 6 RX 470 each one. I have tested one RX 470 at 167 Sol/s

The yearly expected profit says almost 400k euros, it has to be mistaken, but I don't know why, can somebody explain me please? What can I really expect?

Thanks!

Its far more than 40k erors for those 25 rigs, you need mother boards, disk usb risers and PSU and mem so add 25x600 or so to your calcs , thats another 15k in usd
an thats assumining you can get used boards and psus,

[navydude]

All New equipment from newegg. Not sure where you order from but these are up to date prices.

RX 470 - $179 x 150 = $26,850
Risers -  $10 x 150 = $1,500
Mother boards(BTC PRO) - $69 x 25  = $1,750
Memory (8gb) - $40 x 25 = $1,000
Power supply 1600w (LEPA) $249 x25 = $6,225 - Over kill likely. you might could shave off $1,500 to $2,000 but i dont like maxing out power supplies.
SSD 120gb $40 x 25 = $1,000

- Some where to set them up with enough power. -

$500 - $5,000 - Power outlets, conduit, wire, breakers, and labor.

- 5 Tier wire rack is just fine -

Rack- $40 x 7 = $280

- Fan for cooling -

Box fan- $20 x 14 = $280

Exhaust fan- (16") $150 x 2 = $300

Total=$39,185 + Your cost for setting up the electrical. Should be very doable for under 45k US dollars.

Calculate monthly electrical cost

$1800 per month figured on 100w each card. Dont have one to test. That leaves about 4900+ per month profit at current prices. That will most likely change but who knows what direction.

So about 8-9 months ROI should be very possible. But closer to about $60k per year.

[QuintLeo]

The problem is that the first very few days of ZCash mining were INSANELY profitable due to the crazy-high initial pricing, which is warping the "calculation" at the 1 month and longer level.

If you take the "daily" or even the "weekly" estimate and multiply those out they give a somewhat more reasonable expectation - but only *IF* current pricing holds up *AND IF* no more folks point rigs at ZCash driving the difficulty up.

 The real issue longer-term is 3fold.

 1) ZEC pricing has been dropping, and there doesn't seem to be any reason it won't continue to drop long-term.
 2) AS the profitability is higher on ZEC than on other coins for many rig setups, more folks keep pointing more hashrate at ZEC.
 3) ETC is going to end mining and go PoW sometime in 2017 (presuming no more delays) - at which point a LOT of rigs will be looking for new homes, many of those rigs will end up mining ZEC.

 I suspect that the ETC "2 GB card can't mine any more due to DAG size" issue is already driving a some rigs with older cards to ZEC, but some of those rigs would have already switched over 'cause ZEC is more profitable for most folks on those older cards.



 I strongly suspect that even the "229 days to ROI" estimate is quite a bit on the optimistic side, though it fits CURRENT conditions.

[mirny]

3) ETC is going to end mining and go PoW

I think you meant go POS.

[eckmar]

3) ETC is going to end mining and go PoW

I think you meant go POS.

Is this some kind of mistake ? ETH is going to go POS but i remmember reading that ETC said they are never going to do that. Is this my misinformation or your mistake ?

[Amph]

with zcash you are going to look at around 100 btc per year with that speed

1000 sol x 25 rig = 25k sol = 0.27 btc daily = around 100 btc per year x 750 = $75000 per year and not 400k

now remove $10k in electricity if we assume you have 5 cent if 10 cent remove 20k, and you have a net of 55k

now add diff that will be higher and price drop, and the result would be an estimate of 1 year roi....

[armazingerz]

Thank you all for the answers.

I have another question,

how could I evacuate so much heat from the room? I mean, if I mount 150 gpus that's over 20000W, how do people keep a room moderately cold with such a installation like that? Mostly in summer, here it can reach 38º celsius on the street.

Regards

[cptfisher]

at moment with 150 cards 7950 expected profit yearly is in the 60k figures after power @  0.11 so you are definetely wrong @ 400k ...

Heat is not your only problem .... have you thought about power distribution ? else after few ours your whole electric plant will melt .....

 you will need to have more than adequate electric plant at home  , industrial grade , that will cost you at very least some 10 - 20 k  to ensure steady feed to your miners... if you are already into a warehousing then heat is not that problem ....  in winter ... in summer you will need to have some 25kw additional for air conditioning  if you want room at livable temps... if no one lives then 15k will be enough...

thought  about a dc ?

[QuintLeo]

3) ETC is going to end mining and go PoW

I think you meant go POS.

 I did.


 As far as the cooling question - AIRFLOW and lots of it.
 If you are in a DRY climate, Evaporative Cooling can help a lot, and is a lot less expensive than conventional Air Conditioning.

[toptek]

https://www.cryptocompare.com/mining/calculator/zec

try maybe ^

[antantti]

You are late.

But if you still decide to give it a go and are willing to spend over 50 btc I would first rent some cheap hash just to try what it feels like to have some serious mining power.

[Redrose]

What you're not taking in account, as unfortunately so many newbies, is that you'll earn less and less each day, so any calculation over one week is very hard .

[Amph]

What you're not taking in account, as unfortunately so many newbies, is that you'll earn less and less each day, so any calculation over one week is very hard .

not always true, if(and i can assure you that it will, like zcash has come, when there was only etheruem that was delivering profit) something else like zcash will come then the profit will be again the same or higher

before zcash there was libry actually...

[toptek]

What you're not taking in account, as unfortunately so many newbies, is that you'll earn less and less each day, so any calculation over one week is very hard .

not always true, if(and i can assure you that it will, like zcash has come, when there was only etheruem that was delivering profit) something else like zcash will come then the profit will be again the same or higher

before zcash there was libry actually...

They all ways seem to forget that or try to say your wrong for whatever reason . !!! who knows hate maybe..