what would you buy if you had free electricity? sp35?

[bl1nd]

I have been investigating about bitcoin for many years, i even had a pair of miners, i live in venezuela here electricity rates are like 0,001$ kw/h, a friend has a shoe factory thats not working right now so there is lots of free space and a perfect electrical setup for doing some serious mining

I was wondering, if electricity is no problem what would you buy?

Used Spondoolies sp31 35 for around 300$ wich gives me around 5 th/s with the risk of some units being defective or dying before ROI how bad quality wise was spondoolies? i know they went out of business because their miners used lots of power and it simply wasnt profitable anywhere not even in china

Used antminer s7's? i have read they were quality you can find good ones for around 450$ plus psu like 550 for around 4.5 th/s dont know what the risk of defective units is compared to spondoolies but price difference is huge

Avalon 7 new asics 6 th/s 888$ plus psu could be easily 1000$ for only 6 th/s but warranty and great build quality

or Antminer s9 for a shit ton of money around 1800$ with psu for around 13 th/s

im thinking of risking it with the spondoolies, they are SO cheap i can ROI them like in 4 months, but they consume so much electricity that even in a factory i could run out of enough circuits if i wanna have more than 20

[Tupsu]

....

im thinking of risking it with the spondoolies, they are SO cheap i can ROI them like in 4 months, but they consume so much electricity that even in a factory i could run out of enough circuits if i wanna have more than 20

So you only have electrical power about 60kW ?   20x 5,5 Ths =  110 THs (max)   0.1 BTC per day

It is sufficient for 40 x S9     = 540 THs   

PPS/ THs earnings for 1 Ths = 0.00098758 BTC    0.53 BTC per day for 540 THs

[bl1nd]

....

im thinking of risking it with the spondoolies, they are SO cheap i can ROI them like in 4 months, but they consume so much electricity that even in a factory i could run out of enough circuits if i wanna have more than 20

So you only have electrical power about 60kW ?   20x 5,5 Ths =  110 THs (max)   0.1 BTC per day

It is sufficient for 40 x S9     = 540 THs   

PPS/ THs earnings for 1 Ths = 0.00098758 BTC    0.53 BTC per day for 540 THs

Yep but 40xs9 is like 64k$ vs 20 sp35 like 6k$, but yeah i think a good idea may be risking with the spondoolies and then buying s9 with profit, thing is with free electricity i think it isnt worth it to buy new equipment



In the other hand, old equipment has no resell value and s9 i could resell for at least 50% the value

[sidehack]

There's no way I'd build a farm around Spondoolies, especially if I lived somewhere warm. They never ran at listed speed, they're incredibly complex and failure-prone especially because the cooling design isn't that great. I don't think I had a single SP10 or SP3x come through my hosting that didn't break down in some way.

I don't know what shipping is like to Venezuela, but I could get S7 in the US for $350 or less including PSU. That'd get you about the same hashrate from half the power, 1/4 the weight and overall more reliable.

S9 are a reliability nightmare especially if they're running hot, on top of being overpriced.

[bl1nd]

There's no way I'd build a farm around Spondoolies, especially if I lived somewhere warm. They never ran at listed speed, they're incredibly complex and failure-prone especially because the cooling design isn't that great. I don't think I had a single SP10 or SP3x come through my hosting that didn't break down in some way.

I don't know what shipping is like to Venezuela, but I could get S7 in the US for $350 or less including PSU. That'd get you about the same hashrate from half the power, 1/4 the weight and overall more reliable.

S9 are a reliability nightmare especially if they're running hot, on top of being overpriced.

Where can you get S7's for such a low price? i have seen S7's for 350$ 375$ plus at least a 2880w ready ibm psu 175$ for 2 units thats like 90$ with shipping per s7. Around 440$ for each powered s7

[sidehack]

To be honest, I have a bit of unfair advantage with PSU cost since I build PSU hardware, but shelf price for what I build is $80 per S7. I see about half a dozen S7 on the front page of this forum's hardware sales board for under $300.

[adaseb]

S7s are going for around $250 USD on eBay

[bl1nd]

S7s are going for around $250 USD on eBay

where? i cant find one under 375$ at least not BIN

[socks435]

Maybe this link can help you to have idea what is the best to choose or to buy i compare s9 and spondoolies sp31

Check here https://www.cryptocompare.com/mining/bitmain/antminer-s9-miner/
and here https://www.cryptocompare.com/mining/spondoolies-tech/sp31-yukon/

according to the price of spondolies you mention the price of spondolies is low than before but i think it can makes you profit  because of low price right now but the different you are paying electricity so s9 is less electricity than spondoolies..

[adaseb]

S7s are going for around $250 USD on eBay

where? i cant find one under 375$ at least not BIN

There was tons for $250 about a month ago or two. Maybe with the recent Bitcoin price spike they increased the prices. But I wouldn't pay anymore than $250-275 USD for one.

Since you got 60kW, you can buy 100 of them. Each one has 3 blades, undervolt to 0.2W/GHS so each miner will hash at 600Watts using 60000W total.

300Tera gets you $6000 / month.  Bling Bling

Don't buy the SP35

[sidehack]

Most S7 won't get down to 0.2J/GH; best you could reliably hope for is around 0.24J/GH which would still get you 4TH at <1000W. Some will do better, but that setting would pretty much work across the board.

[leowonderful]

I might consider the S5 if you're strapped for cash; it's not a terrible choice, with average power consumption and a good cost. Noise shouldn't be an issue in most cases. The S7 can be made more efficient like sidehack mentioned.

Spondoolies ASICS aren't terrible, but their cooling is pretty bad (ASICS get hot in even perfectly fine temperatures for other miners) and they always hash lower than advertised. Sp20s do have a nice margin for undervolt/clock, though.

[adaseb]

This is the first time I am hearing SP are bad miners. I always assumed they were the Mercedes-Benz of miners.

[sidehack]

I've never liked 'em, at least not the rack units. Ran too loud and too hot and always had parts failing. SP20s were a bit better, but I still saw a lot of them drop loops or whole boards, and some arrived with innards so bounced around (they weren't designed well for shipping) the ribbon cables were getting cut. Everything Spondoolies made was unnecessarily complex, which made way too much room for failures, and the fact their chips required 200A 4-phase bucks that ran like 80% efficient didn't really help much either. That's been my opinion since the first Rockerbox machines rolled out.

[adaseb]

I've never liked 'em, at least not the rack units. Ran too loud and too hot and always had parts failing. SP20s were a bit better, but I still saw a lot of them drop loops or whole boards, and some arrived with innards so bounced around (they weren't designed well for shipping) the ribbon cables were getting cut. Everything Spondoolies made was unnecessarily complex, which made way too much room for failures, and the fact their chips required 200A 4-phase bucks that ran like 80% efficient didn't really help much either. That's been my opinion since the first Rockerbox machines rolled out.

So in your opinion what was the most reliable miner out there?

[bl1nd]

I might consider the S5 if you're strapped for cash; it's not a terrible choice, with average power consumption and a good cost. Noise shouldn't be an issue in most cases. The S7 can be made more efficient like sidehack mentioned.

Spondoolies ASICS aren't terrible, but their cooling is pretty bad (ASICS get hot in even perfectly fine temperatures for other miners) and they always hash lower than advertised. Sp20s do have a nice margin for undervolt/clock, though.

Im leaning towards buying some S7's with ibm 2880w PSU for each pair of S7's, thinking of starting with 16 to see how it goes the first 2 months... i have room to grow a lot in that location.

How reliable are the S7's? i have heard they break down a lot less than the S9, for example i buy 20 used units in good condition what can i expect 1 or 2 units with problems the first 2 months? maybe a bad blade. Bitmainwarranty has presence here in venezuela so thats a plus

I've never liked 'em, at least not the rack units. Ran too loud and too hot and always had parts failing. SP20s were a bit better, but I still saw a lot of them drop loops or whole boards, and some arrived with innards so bounced around (they weren't designed well for shipping) the ribbon cables were getting cut. Everything Spondoolies made was unnecessarily complex, which made way too much room for failures, and the fact their chips required 200A 4-phase bucks that ran like 80% efficient didn't really help much either. That's been my opinion since the first Rockerbox machines rolled out.

So in your opinion what was the most reliable miner out there?

From what i have read trying to find the best asic to fit my needs, Avalon is great when it comes to being reliable and build quality

I thought about Spondoolies SP because i had no problem with electricity but if they are gonna have problems all the time it isnt worth it but i gotta say 4.9 th/s for 300$ with PSU included in rack form is pretty tempting but not worth it if i start having drop loops and start losing th/s and thats best case scenario

[leowonderful]

I might consider the S5 if you're strapped for cash; it's not a terrible choice, with average power consumption and a good cost. Noise shouldn't be an issue in most cases. The S7 can be made more efficient like sidehack mentioned.

Spondoolies ASICS aren't terrible, but their cooling is pretty bad (ASICS get hot in even perfectly fine temperatures for other miners) and they always hash lower than advertised. Sp20s do have a nice margin for undervolt/clock, though.

Im leaning towards buying some S7's with ibm 2880w PSU for each pair of S7's, thinking of starting with 16 to see how it goes the first 2 months... i have room to grow a lot in that location.

How reliable are the S7's? i have heard they break down a lot less than the S9, for example i buy 20 used units in good condition what can i expect 1 or 2 units with problems the first 2 months? maybe a bad blade. Bitmainwarranty has presence here in venezuela so thats a plus

I've never liked 'em, at least not the rack units. Ran too loud and too hot and always had parts failing. SP20s were a bit better, but I still saw a lot of them drop loops or whole boards, and some arrived with innards so bounced around (they weren't designed well for shipping) the ribbon cables were getting cut. Everything Spondoolies made was unnecessarily complex, which made way too much room for failures, and the fact their chips required 200A 4-phase bucks that ran like 80% efficient didn't really help much either. That's been my opinion since the first Rockerbox machines rolled out.

So in your opinion what was the most reliable miner out there?

From what i have read trying to find the best asic to fit my needs, Avalon is great when it comes to being reliable and build quality

I thought about Spondoolies SP because i had no problem with electricity but if they are gonna have problems all the time it isnt worth it but i gotta say 4.9 th/s for 300$ with PSU included in rack form is pretty tempting but not worth it if i start having drop loops and start losing th/s and thats best case scenario

In terms of reliability, it's average. Not as good as previous units, but definitely better than competitors like spondoolies. They run well and don't overheat often, if you clean them regularly to prevent dust buildup. Make sure you have good filters on your A/C, dust is a huge issue with miners and heat. Bitmainwarranty is definitely a good retailer, price is pretty good imo but prices can occasionally be found lower.

[sidehack]

I've never liked 'em, at least not the rack units. Ran too loud and too hot and always had parts failing. SP20s were a bit better, but I still saw a lot of them drop loops or whole boards, and some arrived with innards so bounced around (they weren't designed well for shipping) the ribbon cables were getting cut. Everything Spondoolies made was unnecessarily complex, which made way too much room for failures, and the fact their chips required 200A 4-phase bucks that ran like 80% efficient didn't really help much either. That's been my opinion since the first Rockerbox machines rolled out.

So in your opinion what was the most reliable miner out there?

Honestly, I might have to say the ASICMiner Tube. I had a buttload of them (about 30?) that got run in 110F down to about 40F temperatures and I dropped exactly 6 chips. The VRM driver fried, which was an easy replacement. The S1 and S3 were pretty solid, but if we're looking at something with twice the power density those Tubes were tanks.
That's physical reliability, of course. They had their own problems what with the botched stratum implementation on the cheesy controller bricks, but we had workarounds for most of that already figured out before most of North America had received theirs yet.

I've had very few problems with the fleet of Avalon6 miners that have come through. They're more sensitive to heat than S7 is, but in my experience they fail slightly less often. S7 are too power-dense for my tastes, but they do undervolt nicely which, by not running boards as hard, should extend the functional lifetime and reduce overall failures.

If I can build a miner that's as reliable as an AntMiner S3 or ASICMiner Tube, I'll be happy with that.

[Biodom]

S7s are going for around $250 USD on eBay

OP always tries to talk the cost down by stretching the truth.
See http://www.ebay.com/itm/Bitmain-AntMiner-S7-4-73-TH-s-/152303472263?hash=item2375fe8e87

Highest bid $400 with an hour to go (slightly higher that nonexistant $250,  )
LOL

[leowonderful]

S7s are going for around $250 USD on eBay

OP always tries to talk the cost down by stretching the truth.
See http://www.ebay.com/itm/Bitmain-AntMiner-S7-4-73-TH-s-/152303472263?hash=item2375fe8e87

Highest bid $400 with an hour to go (slightly higher that nonexistant $250,  )
LOL

There's one for 375( http://www.ebay.com/itm/Bitmain-Antminer-S7-4-7-TH-sec-2-fans-/322322870618?hash=item4b0bf0b15a:g:v10AAOSwx2dYIizE), not sure why people would bid an S7 to 400. Still not at 250 yet, expect those kinds of prices once S5s become widely phased out, which will take quite some time. Nice deal on S7s, but nothing much for us with regular electrical prices.