AJ thanks for posting this.
You saved several of us some time even thinking about it, and can come straight here to copy yours in readiness for our Compac's.
or just buy this http://www.ebay.com/itm/221661361513?not saying it is better I am waiting on my 5 cables to arrive. for all I know they will work poorly I will look for your notes on it working or not. I've been looking at USB3 externally powered hubs, but none seem to offer the amperages you guys talk about for being able to go to the high end of frequencies on sidehack's sticks. also remember that when you push the sticks they become less efficient. I got lazy and stopped at 1.1amps per port and freq 250 giving me 13.7gh and about .33-.34 watts a gh. Therealsteve has pushed the sticks up to 23gh! but they then use over .4 watts a gh they need a fan and are still pretty hot. I think he was at freq 350 or 375 IIRC. 425 freq corrected |
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http://btc.blockr.io/chartsAnd the first four days for this diff adjustment pre China explosion. A coincidence ? or did some damage occur. Not farms but net or just power restrictions to 1 farm near the blast. Likely a coincidence Unless some Bitcoin miners located near that area had to be shut down temporarily It may be possible to figure it out if there was a site near there through the history and location of active Bitcoin nodes just look post and pre explosion but not aware of a service that tracks historical nodes. My thoughts are some power interruptions may have occur in the entire area. This meant some gear was put off line. We backed of from a +4.00% to +1.00% 3.00% is about 10-11ph so some could have been sales of used s-5's and s-5+'s the rest may have been power outages. |
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solar is pretty cheap if you only run in the day and don't use batteries. The panels and inverter last a long time. So for the right person solar can work. A farm with an old large chicken coop would be ideal. this shape below, but longer. If you have cheap power run on the grid in the night and on the solar in the day.  |
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http://btc.blockr.io/chartsAnd the first four days for this diff adjustment pre China explosion. Aug 8 2015 163 +19 but about +10 since part was last diff Aug 9 2015 133 -11 so -1 Aug 10 2015 168 +24 So +23 Aug 11 2015 170 +26 means we are + 49 And the 6 days after the China explosion. Aug 12 2015 122 -22 Aug 13 2015 151 +7 Aug 14 2015 137 -7 Aug 15 2015 136 -8 Aug 16 2015 141 -3 -33 after the explosion Aug 17 2015 145 +1 -32 after the explosions So A coincidence ? or did some damage occur. Not farms but net or just power restrictions to 1 farm near the blast. Always hard to fully understand dynamics of diff. Just look at the last 10 days we had 122 as a low and 170 as a high! Those are really big swings. Our real number is +17 blocks so we made 1413 and 1396 would be 0% we are really at +1.21% Looking at the photos of the fire/explosions does make you realize BTC centralization is a bad thing. Farms of 20ph or more mean 20/350 or 5.7% of the network. Asic builders should take note the 2x 10ph farms are better then 1x 20ph Well 603 blocks left should be fun.
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Can the hash on the S5 be split 50/50 so it can be shared with two people ?
You could try load balancing. But why not just split the payout manually? I'm not sure how accurate load balancing is on Antminer or even if it works. load balancing works on s-3's pretty well but certain pools will really fuck you . It is possible to lose due to errors. As for s-5's I am not sure. notice the workers named philipma1957.3 philipma1957.4 have high errors. I split them f2pool/cksolopool and I lost a ton of hash until I figured the issue out.  |
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Thanks for the post. I was thinking about you as I read this thread and then you posted to it. |
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ROI rate may vary as the Price may change/vary from the time you calculated the ROI.
In BTC we are much dependent on the rate rather than coins.
In 2013 the price was somewhere 1000$ per BTC means 0.1BTC can buy you much stuffs and was much effective at that time.
I corrected your error 2003 should read 2013 as BTC was invented in 2009 |
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Well your math seems to be accurate. however you just forgot a very important detail. The Halving. so, considering bitcoin mining rewards will drop to half if someone starts mining at this point, the possible outcome would be to never reach ROI...
The halving is June July or August 2016 Most likely July 2016 |
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Based on Bitmain's past record of reusing design work, I'd bet the S7 will be same form factor and same front/back plates as the S3/S5.
I'd go 80/20 on 2 hash boards vs. 3 like the "S5+".
I'd bet on it being 1KW power consumption or less, but not on HOW much less.
Definitely new chip with better specs - but how much better is a good question, and a high probability they'll run the chip at or very close to it's LEAST efficient point to maximize hash rate NOT efficiency.
Price, actual hash rate, power consumption, and date of first shipment are the big questions right now.
Chip technology doesn't really matter except indirectly in how it affects the hash rate and power consumption.
The S5+ is perfectly practical with 110V - I have no clue why people keep saying it needs 220. You DON'T have to run it from a single power supply after all.
I do still think the S5+ should have been called the S6 though, even if it's not really rack-mount form factor it's CLOSE.
I don't think the S5+ has a direct effect on when the S7 will go on sale - I think the only real holdup on the S7 right now is Bitmain clearing out all of their "used farm/Hashnest" S5 units as they get them replaced by S7 (or perhaps S8 or "S7+) units.
The people complain because it needs 2x 220-240v for optimal efficiency and also because 220v is more efficient, about 2% less waste, which at 90% is a 20% reduction in waste, up to 40%. Etc. We could see a s7 be at around 0.8kWh for like 2.5TH. We'll see. the s7 won't come out for months. There is a good chance s-5++ can be made to run downclocked to 4.75th and use 1800 watts that translates to .375 watts a gh. I will be ordering an s-5+ this weekend and try to test the findings out from this thread. https://bitcointalk.org/index.php?topic=1151460.0if it tests as expected the s-5 generation has a lot of life left to it. No need for bitmaintech to sell s-7's They will off load all s-5's and s-5+'s for months to come. and if the mods allowing for lower power use pan out we will not see a s-7 until Jan or feb. |
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My gut feeling, For what that's worth,  is that it will probably be ok.... You will of course need a lot of amps at the reduced supply voltage, so we will need to crack modifying server PSU's to run at a lower voltage. The good news is that because they have extended the chain length to 16 all of the voltages in the table will be Plus about 0.7V for the same J/GH. So in the order 10V to 11V Rich I did some quick math on it. the step downs I found cost 15 each 9 boards with 3 connectors = 27 stepdowns at 15 is 405 not acceptable to spend that much. But to test this I can use 1 board run it at freq 200 get power numbers. With 12 volts each board should use close to 385 watts at freq 325 Once i see what the one board does at freq 200 (my guess is 237 watts as 200/325 x 385 = 237) then run the one board with 2 step downs which are rated for 150 + 150 = 300 watts if I go down to 10 volts 10/12 x 237 = 197.5 watts a board so the full thing would be 9 x 197.5= 1777 watts and hash at 4.75 th or .375 watts a gh. If all of the above is true the s-5+ just got better. |
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It does freq 250 13.75gh in its sleep. I get about .33 watts a gh.
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Phil do remember that the S5 is yet to be understood & the S5+ is completely uncharted. You would be hoping that the S5 solution is something like the multiple Clock Modules and that they carried that design through to the S5+
Rich
yeah but if true it makes the s-5++ worth quite a bit more. Start out with whatever your power/sound/heat will bear. Then clock differently as your prices for power change. In my case power is 16.9 cents in the summer add more for ac. Not that I use ac to cool it but it will warm my house a bit so I am in the 18 cent a kwatt for power right now. If it works on an s-5+ I can down clock until my winter power rates come in 13 cents minus a 3 cent benefit for the heat. 10 cent power. It allows me the s-5+ in house. If it does not work I have a place to host it. I ordered the coins from coinbase they come on friday. |
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If anyone wants to run a test on their S5. Remember you do not need a high current supply to do it. Only connect one of the hash boards to the supply, the one with the 4 pin connector to the control board, this will halve the current needed for the test.
Set the frequency to 125Mhz. You then just need a supply with a voltage between 9.25 & 10 Volts at 6 Amps and that will be good enough to give a strong indication that the tested S5 will or will not support undervolting.
For a quick test you can probably get away with putting two or three 10 Amp Silicon Diodes in series with your 12V supply. You will need to monitor the voltage getting to the hash board when it is hashing to find the exact voltage it is running at.
Rich
Just to add. The most important board to test at this stage is a V1.9. As far as I can see it's identical to V1.91 but without the additional Clock Modules. If this does not Undervolt almost certainly none of the earlier versions will.
your research on this is to be commended. I really think it would allow some s-5's v1.9, v1.91 an under clock I also think it works for the s-5++ if so the s-5++ becomes a better piece of gear. For the home miner. I ordered btc from coinbase it arrives this friday. I will order the s-5++ and test it. |
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so the facts are the early versions tested don't do well at 9 or 10 volts
the newest version did great at 10 volts even 9.5 volts.
v1.1 2014-12-03
v1.3 2014-12-15
v1.5 2014-12-20
v1.7 2014-12-22
v1.9 2015-01-08
one from below was able to clock low
v1.91 2015-03-28
v1.91 2015-03-28 -With mini heatsinks
so we need the people that tested and got bad results to get back to this thread and let us know what boards they tested.
Like you said it may be multiple units of s-5 can do this.
not just version v1.91
this would let the 'good s-5' run at 650gh 200 watts and with quiet fans.
it may allow for the s5+ to drop to 6th and use only 2400 watts.
lots of possibilities.
I think I may get an s-5+ and test this out. rather then get an s-5.
P.S. don't be sensitive to my style of writing I have been through a lot on this site and have been pretty blunt.
I would think this thread should get interest and it does not get a lot.
I am making an effort to acquire some btc and get the s-5+
I would like to think it can be down clocked to a sane sound /power use via your methods.
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Bitcoin Difficulty: 52,699,842,409 Estimated Next Difficulty: 52,677,038,886 (-0.04%) negativeeeeeeeeeeeeeeeee!  Now that is great news! Only thing is all the S5+'s are in the mail most likely. So we had a decent amount of machines unplugged and now in mail I would guess. And they take cash via bank transfers. So if they unplugged 4.3x the 800th that would be 3.5ph or a full 1% drop . I still think those fires/explosions in China affected power to a farm or 2. We were +4% that is 14ph drop. |
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from that addy I think this is the s-5+ tally
26 orders of 1
8 orders of 2
3 orders of 3
1 order of 4
3 orders of 5
1 order of 7
1 order of 8
2 orders of 10
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What do you get for power running both modes?
970 watts?
I think its close to 1,000 with the power supply overhead on a platinum rated PSU I friend my last kill A watt so I have another one on order I will take a picture of it when i get it Monday thanks looking forward to it. 1000 watts is not terrible. |
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@alh 1000 s-5+ and 2000 s-5 = 10ph 3000 s-5+ and 6000 s-5 = 30ph I do not think they can sell and ship 30ph in two weeks even if they want to do it. http://btc.blockr.io/chartsAnd the first four days for this diff adjustment pre China explosion. Aug 8 2015 163 +19 but about +10 since part was last diff Aug 9 2015 133 -11 so -1 Aug 10 2015 168 +24 So +23 Aug 11 2015 170 +26 means we are + 49 And the 5 days after the China explosion. Aug 12 2015 122 -22 Aug 13 2015 151 +7 Aug 14 2015 137 -7 Aug 15 2015 136 -8 Aug 16 2015 141 -3 -33 after the explosion So A coincidence ? or did some damage occur. Not farms but net or just power restrictions to 1 farm near the blast. Some will say it was bitmaintech selling off s-5+ For me to figure what they sold I need someone to pm me a btc address they used to pay for one s-5+ I can back track to a larger btc address and try to filter out purchases that are not a multiple of 9.9 coins. |
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AJ thanks for posting this.
You saved several of us some time even thinking about it, and can come straight here to copy yours in readiness for our Compac's.
or just buy this http://www.ebay.com/itm/221661361513?not saying it is better I am waiting on my 5 cables to arrive. for all I know they will work poorly |
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