BTC1.609 including shipping is what I am coming up with at this time.
Phillip, with FREE electricity, and ZERO difficulty increases, that would mean an ROI time of 132 days. If you put ANY realistic figures for electricity cost or difficulty increase (as in, the real world) You'll see that nobody should be buying these. It is a blatant slap in miners' faces.
Topic: Unofficial Spondoolies SP20 thread - page 21. (Read 126164 times)
That trying to prolong life of asics is bullshit...
That gear will be not usable after 6 to 12 months, so just get the max from it and don't care for their life.
I push them to the max and trying to mine as much is possible before next gen was released.
I have 2 sp20e and im lucky so far to not pay for electricity where they are located.
I sett one fan to 100% but second to 80% because there is very annoying fan resonance if both are set to 100% and that resonant noise can be heard behind wall.
That gear will be not usable after 6 to 12 months, so just get the max from it and don't care for their life.
I push them to the max and trying to mine as much is possible before next gen was released.
I have 2 sp20e and im lucky so far to not pay for electricity where they are located.
I sett one fan to 100% but second to 80% because there is very annoying fan resonance if both are set to 100% and that resonant noise can be heard behind wall.
Raised the price while it was in my checkout 
Unbelievable.
yeah 384 for march 30th shipping
and 354 for june 9th shipping
BM charges for shipping now--you may double check the math on it! Unbelievable.
I know this is not a bitmain thread, but S5 batches 5 and 6 up now!
yeah 384 for march 30th shipping
and 354 for june 9th shipping
prices are high.
I think I like that anything that keeps diff jumps small and does not crash btc price works.
I was a bit too slow buying some china hosting from lee's group buy. I have 4 with him. I wanted to get to 5 or 6.
I have 3 sp20's in house.
I have a set of avalon 4.1's in house. just about 5500 or 5600gh
the 4 s-5's with lee in China are around 4600gh
For now I need to stand pat for a diff jump, I hope for <2% diff jump and >5% btc price rise around March 22nd
I think I like that anything that keeps diff jumps small and does not crash btc price works.
I was a bit too slow buying some china hosting from lee's group buy. I have 4 with him. I wanted to get to 5 or 6.
I have 3 sp20's in house.
I have a set of avalon 4.1's in house. just about 5500 or 5600gh
the 4 s-5's with lee in China are around 4600gh
For now I need to stand pat for a diff jump, I hope for <2% diff jump and >5% btc price rise around March 22nd
Raised the price while it was in my checkout
Unbelievable.
yeah 384 for march 30th shipping
and 354 for june 9th shipping
Unbelievable.
I know this is not a bitmain thread, but S5 batches 5 and 6 up now!
yeah 384 for march 30th shipping
and 354 for june 9th shipping
I know this is not a bitmain thread, but S5 batches 5 and 6 up now!
yeah 384 for march 30th shipping
and 354 for june 9th shipping
I know this is not a bitmain thread, but S5 batches 5 and 6 up now!
That gear will be not usable after 6 to 12 months, so just get the max from it and don't care for their life.
I tend to agree, although past history doesn't guarantee future performance--in this case in regards to difficulty increases. I don't overclock my machines so I can sell them into the used ASIC market without feeling like a dick, but I also don't underclock them to prolong their lifespans.
Many people here will run under spec to gain higher power efficiency to offset electricity costs. I prefer to run them in a less efficient manner to acquire more coins at a higher fiat cost. I do this because if the coins jump in price by a factor of five or ten, the extra electricity I paid for them will be a nominal consideration. I'm basically buying BTC via the exchange that is my local power company, but to each his own!
Cheers.
there is a lot to be said about that method.
Yes and the best exchange is in Washington State.
That gear will be not usable after 6 to 12 months, so just get the max from it and don't care for their life.
I tend to agree, although past history doesn't guarantee future performance--in this case in regards to difficulty increases. I don't overclock my machines so I can sell them into the used ASIC market without feeling like a dick, but I also don't underclock them to prolong their lifespans.
Many people here will run under spec to gain higher power efficiency to offset electricity costs. I prefer to run them in a less efficient manner to acquire more coins at a higher fiat cost. I do this because if the coins jump in price by a factor of five or ten, the extra electricity I paid for them will be a nominal consideration. I'm basically buying BTC via the exchange that is my local power company, but to each his own!
Cheers.
there is a lot to be said about that method.
That gear will be not usable after 6 to 12 months, so just get the max from it and don't care for their life.
I tend to agree, although past history doesn't guarantee future performance--in this case in regards to difficulty increases. I don't overclock my machines so I can sell them into the used ASIC market without feeling like a dick, but I also don't underclock them to prolong their lifespans.
Many people here will run under spec to gain higher power efficiency to offset electricity costs. I prefer to run them in a less efficient manner to acquire more coins at a higher fiat cost. I do this because if the coins jump in price by a factor of five or ten, the extra electricity I paid for them will be a nominal consideration. I'm basically buying BTC via the exchange that is my local power company, but to each his own!
Cheers.
That trying to prolong life of asics is bullshit...
That gear will be not usable after 6 to 12 months, so just get the max from it and don't care for their life.
I push them to the max and trying to mine as much is possible before next gen was released.
I have 2 sp20e and im lucky so far to not pay for electricity where they are located.
I sett one fan to 100% but second to 80% because there is very annoying fan resonance if both are set to 100% and that resonant noise can be heard behind wall.
That gear will be not usable after 6 to 12 months, so just get the max from it and don't care for their life.
I push them to the max and trying to mine as much is possible before next gen was released.
I have 2 sp20e and im lucky so far to not pay for electricity where they are located.
I sett one fan to 100% but second to 80% because there is very annoying fan resonance if both are set to 100% and that resonant noise can be heard behind wall.
My pair of s-3's have run non-stop since july I have them underclocked to freq 212 the two total 850gh and they pull about 650 watts. the power cost is 2.4 cents a kwatt.
So I am doing the exact opposite of your advice. Since the cost to run the pair is 15 usd a month and they earn 75 a month I am netting 60 a month in usd.
I would hope to run these for 18 months .
at a diff of 126 they would pull in 27 usd a month and cost 15 to run. I think diff of 126 will not happen until jan or feb of 2016. So I nurse mine.
But to each his own as your plan may work for you.
Running solid for couple days. Pulling 795w (kill a watt) = .5794.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Not sure if your fan is set to "auto" or not? The reason I say this is because I see your fan speed is at "10." This is a big part of the reason your ASIC's are pretty damn hot on some boards. I prefer "longevity" of the unit versus "working the hard" at high temps. I prefer higher fan speed to keep them cooler. Yes, it is less power efficient if you wish to maintain your present hash rate with a higher fan speed. However, it increases the life of your ASIC's. This is my opinion.
If you insist on having a higher hash rate while taking care of your rigs, consider a higher fan speed while sacrificing power efficiency. I clocked one of mine to a similar hash rate as yours but with higher fan speed to show you the temps and power consumption. The present power efficiency at these settings is .63 watts per GH/s.
Understood. Thanks for the opinion. Is 100-105c acceptable? I'm balancing fan noise with longevity with hash rate with wattage.
I'd say yes. Keep it under 115C and your ok.
It starts to throttle as it approaches 120-125C
As to longevity, lets face it these things have a lifespan of aprox no more than 12 months really
Running solid for couple days. Pulling 795w (kill a watt) = .5794.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Not sure if your fan is set to "auto" or not? The reason I say this is because I see your fan speed is at "10." This is a big part of the reason your ASIC's are pretty damn hot on some boards. I prefer "longevity" of the unit versus "working the hard" at high temps. I prefer higher fan speed to keep them cooler. Yes, it is less power efficient if you wish to maintain your present hash rate with a higher fan speed. However, it increases the life of your ASIC's. This is my opinion.
If you insist on having a higher hash rate while taking care of your rigs, consider a higher fan speed while sacrificing power efficiency. I clocked one of mine to a similar hash rate as yours but with higher fan speed to show you the temps and power consumption. The present power efficiency at these settings is .63 watts per GH/s.
Understood. Thanks for the opinion. Is 100-105c acceptable? I'm balancing fan noise with longevity with hash rate with wattage.
In my opinion, it is not acceptable for the longevity of the ASIC's. The fan is there to keep it cool. We need to allow it to do it's job. The "auto" setting for the fan doesn't work quite well at keeping the ASIC's at less than 85c unless your ambient temperature is less than 10 degrees Celsius (50 degrees Fahrenheit). Again, this is my opinion. Others may see this differently than I do. You can ask around if you like at other Spondoolies-tech threads.
Running solid for couple days. Pulling 795w (kill a watt) = .5794.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Not sure if your fan is set to "auto" or not? The reason I say this is because I see your fan speed is at "10." This is a big part of the reason your ASIC's are pretty damn hot on some boards. I prefer "longevity" of the unit versus "working the hard" at high temps. I prefer higher fan speed to keep them cooler. Yes, it is less power efficient if you wish to maintain your present hash rate with a higher fan speed. However, it increases the life of your ASIC's. This is my opinion.
If you insist on having a higher hash rate while taking care of your rigs, consider a higher fan speed while sacrificing power efficiency. I clocked one of mine to a similar hash rate as yours but with higher fan speed to show you the temps and power consumption. The present power efficiency at these settings is .63 watts per GH/s.
Understood. Thanks for the opinion. Is 100-105c acceptable? I'm balancing fan noise with longevity with hash rate with wattage.
Running solid for couple days. Pulling 795w (kill a watt) = .5794.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
Not sure if your fan is set to "auto" or not? The reason I say this is because I see your fan speed is at "10." This is a big part of the reason your ASIC's are pretty damn hot on some boards. I prefer "longevity" of the unit versus "working the hard" at high temps. I prefer higher fan speed to keep them cooler. Yes, it is less power efficient if you wish to maintain your present hash rate with a higher fan speed. However, it increases the life of your ASIC's. This is my opinion.
If you insist on having a higher hash rate while taking care of your rigs, consider a higher fan speed while sacrificing power efficiency. I clocked one of mine to a similar hash rate as yours but with higher fan speed to show you the temps and power consumption. The present power efficiency at these settings is .63 watts per GH/s.
Running solid for couple days. Pulling 795w (kill a watt) = .5794.
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
http://i.imgur.com/PyHkEgR.png
Do these run better, more efficient, if the chips are colder? Say 85c vs 110c.
http://i.imgur.com/PyHkEgR.png
Seems like westhash/nicehash don't get used with price set to p=0.013 ?
Correct. Because Nicehash is currently at 0.0106 BTC/TH/Day. If you want to use Nicehash, you have to set it lower. Or remove the "p=0.013".
http://i.imgur.com/xNchhg4.png?1
Hi all,
Can someone tell me if this mining configuration looks good for sp20?
http://i.imgur.com/sB82Ue8.png
Seems like westhash/nicehash don't get used with price set to p=0.013 ?
Can someone tell me if this mining configuration looks good for sp20?
http://i.imgur.com/sB82Ue8.png
Seems like westhash/nicehash don't get used with price set to p=0.013 ?
Hi,
Where I can find a controller board for sp20 ? the main chip is burned
Is a way to mine with an raspberry directly to asics?
Where I can find a controller board for sp20 ? the main chip is burned
Is a way to mine with an raspberry directly to asics?
I am pretty sure you'll need to contact Spondoolies. I think the controller is actually "Beaglebone Black" centric, and has an FPGA on it, likely for connecting to the hash boards, and/or the fan.
You might also try the "Maketplace" forum and see if somebody has an SP20 that's dead for a different reason, and would sell you the controller board. I'd try Spondoolies first though. Since it's coming up on their weekend, give them time to respond.
Did anyone ever try to underclock the SP20. Im starting to look at that for the winter.
What is the lower volt that the chip can take ?
Is 1th the minimum or we could go below and get less heat?
What is the lower volt that the chip can take ?
Is 1th the minimum or we could go below and get less heat?
You can go below that, due to heat, noise and electricity costs during the day I underclock mine to around 900GH/s
Note: I underclock 5 of my 8 SP20s using these exact settings and the hash rates vary wildly by box, the low is 890GH/sec and the high is 980GH/sec
Here are the settings I use:
Its pulling 505 watts at the wall with these settings (using a kill-a-watt) and there's very little heat.
Great thanks you for that. I will keep that information for this summer.
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