dmwardjr
Legendary
 Offline
Activity: 1302
Merit: 1318
Technical Analyst/Trader
|
 |
December 19, 2015, 12:19:26 PM |
|
i'd rather have a stable miner with slightly lower hashrate but with minimal HW error & less heat.
Exactly this. The first thing I do with all my antminers is lower the frequency slightly - it brings down the error rate, reduces power consumption making them more efficient, they run more stable & reduces wear, prolonging their usable life span. Bitmain sell their miners tuned to the limit, but I'd rather have a slightly lower hash rate but a longer lasting & more reliable/efficient miner. Well said, Pug! Time to sleep everyone. Have a good day! |
|
|
|
|
|
|
|
|
|
|
|
|
TalkImg was created especially for hosting images on bitcointalk.org: try it next time you want to post an image
|
|
|
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction.
|
|
|
yslyung
Legendary
Offline
Activity: 1500
Merit: 1002
Mine Mine Mine
|
|
December 19, 2015, 12:22:39 PM |
|
i'd rather have a stable miner with slightly lower hashrate but with minimal HW error & less heat.
Exactly this. The first thing I do with all my antminers is lower the frequency slightly - it brings down the error rate, reduces power consumption making them more efficient, they run more stable & reduces wear, prolonging their usable life span. Bitmain sell their miners tuned to the limit, but I'd rather have a slightly lower hash rate but a longer lasting & more reliable/efficient miner. Well said, Pug! Time to sleep everyone. Have a good day! btw, those who just bought b8, you got PAWNED ! price dropped heh  |
|
|
|
|
|
Subw
|
|
December 19, 2015, 12:27:12 PM |
|
|
|
|
|
|
|
|
|
nhando
|
|
December 19, 2015, 12:36:16 PM |
|
i'd rather have a stable miner with slightly lower hashrate but with minimal HW error & less heat.
Exactly this. The first thing I do with all my antminers is lower the frequency slightly - it brings down the error rate, reduces power consumption making them more efficient, they run more stable & reduces wear, prolonging their usable life span. Bitmain sell their miners tuned to the limit, but I'd rather have a slightly lower hash rate but a longer lasting & more reliable/efficient miner. Well said, Pug! Time to sleep everyone. Have a good day! btw, those who just bought b8, you got PAWNED ! price dropped heh Everything is relative. Another way to look at it is, we got a discount from previous batch. Also by the time others receive their Batch 9, we've made more than the cost difference in BTC. If anything, I want a few more now than to wait another 1.5 months+ as they're not shipping out until up to Jan 30th which means it can be up until Feb when we get the Batch 9 boxes where the difficulties are also increased even further. Time = Money......$$$ On Another subject : Why is BitMain site keep on being down past few days? |
Just "Mining" my own business.
|
|
|
|
J4bberwock
|
|
December 19, 2015, 12:47:01 PM
Last edit: December 19, 2015, 01:58:35 PM by J4bberwock |
|
Ok, so, the "30C" resistor is the 20k reference one. " and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips Edit: not "123"(12k), but there should be a 1.2k resistor or close value. 1.1k resistor in place of the 1.2k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. |
|
|
|
VirosaGITS
Legendary
Offline
Activity: 1302
Merit: 1068
|
|
December 19, 2015, 01:26:45 PM |
|
Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. |
|
|
|
|
J4bberwock
|
|
December 19, 2015, 01:50:37 PM |
|
Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. yes, it should work, but since the resistor in on board, the value you can read will be different from 20k. So as for the good old antS1, you will need to do it by trials and errors until someone check the original value with a 20k resistor on board, and the target value with a 18k resistor (or 16k for 0.57v at the chips) |
|
|
|
philipma1957
Legendary
Offline
Activity: 4116
Merit: 7824
'The right to privacy matters'
|
|
December 19, 2015, 02:02:20 PM |
|
To chime in on squeezing the most out of an s-7 Psu quality has a big difference. I am doing freq 631 on a batch 2 marked at 575 freq . I get more then 5075 gh error rate = .0004% How does this happen? Use a 2880 watt psu with your breakout board and your 3 ft 15 awg cables. Since it is 1 s-7 on the psu the 2880 watt has lots of overhead. this is the best I have done with the 2880 watt psu  same machine using an evga 1600 t2 psu still very good but not quite as good as the 2880 watter  |
|
|
|
beffje
Member
Offline
Activity: 71
Merit: 10
|
|
December 19, 2015, 02:24:43 PM |
|
Nice info Philipma,
Do you also have the power at wall consumpion for for the two?
Thanx
|
|
|
|
|
|
|
AriesIV10
Legendary
Offline
Activity: 1260
Merit: 1006
Mine for a Bit
|
|
December 19, 2015, 02:41:27 PM |
|
Anyone look at the efficiencies of the later batches?
I was talking to my buddy who has a bunch of Batch 6, 4.05TH ones running at 4.4-4.5TH but only using 1150-1190Watts at the wall with EVGA 1300G2's.
He told me a few were even clocked at 4.2TH when he received it from factory at 625MH.
So that works out to be more efficient than all the other batches, no? I'm talking about real world @ wall usage , not the BS they usually advertise.
Maybe Batch 6's are the ones to get and Batch 7-8 is to be avoided like the plague as a LOT of them are having issues.
Batch 1 uses 1210 W to get 4.86 TH/s = Actual Efficiency: 0.2490 J/GH Batch 2 uses 1160 W to get 4.66 TH/s = Actual Efficiency: 0.2489 J/GH Batch 3 uses 1210 W to get 4.86 TH/s = Actual Efficiency: 0.2490 J/GH Batch 4 uses 1160 W to get 4.66 TH/s = Actual Efficiency: 0.2489 J/GH Batch 5 uses 1210 W to get 4.86 TH/s = Actual Efficiency: 0.2490 J/GH Batch 6 uses 1042 W to get 4.05 TH/s = Actual Efficiency: 0.2572 J/GH Batch 7 uses 1278 W to get 5.06 TH/s = Actual Efficiency: 0.2573 J/GH Batch 8 uses 1293 W to get 4.73 TH/s = Actual Efficiency: 0.2734 J/GH It is all about efficiency 24 hours a day! Looks to me that the Efficiency is going down. Is that actual measured watt usage or what is claimed by Bitmain. My B1 used 1280-1290watts at full blast (Just around 4.85TH. Hmm, that's not that good. My B1 is at 625 with 1230-1235 watts running 5017GH/s 1235/5017 = 0.24616 Very Nice! |
|
|
|
AriesIV10
Legendary
Offline
Activity: 1260
Merit: 1006
Mine for a Bit
|
|
December 19, 2015, 02:44:49 PM |
|
To chime in on squeezing the most out of an s-7 Psu quality has a big difference. I am doing freq 631 on a batch 2 marked at 575 freq . I get more then 5075 gh error rate = .0004% How does this happen? Use a 2880 watt psu with your breakout board and your 3 ft 15 awg cables. Since it is 1 s-7 on the psu the 2880 watt has lots of overhead. this is the best I have done with the 2880 watt psu same machine using an evga 1600 t2 psu still very good but not quite as good as the 2880 watter Do you know your actual usage in Watts? If so, take the Watts/GHs=Efficiency. (Watts/5075=Efficiency) It is all about the efficiency. |
|
|
|
beffje
Member
Offline
Activity: 71
Merit: 10
|
|
December 19, 2015, 03:02:06 PM |
|
Thanx for that. But maybe a bit more in detail. |
|
|
|
|
beffje
Member
Offline
Activity: 71
Merit: 10
|
|
December 19, 2015, 03:07:00 PM |
|
Anyone look at the efficiencies of the later batches?
I was talking to my buddy who has a bunch of Batch 6, 4.05TH ones running at 4.4-4.5TH but only using 1150-1190Watts at the wall with EVGA 1300G2's.
He told me a few were even clocked at 4.2TH when he received it from factory at 625MH.
So that works out to be more efficient than all the other batches, no? I'm talking about real world @ wall usage , not the BS they usually advertise.
Maybe Batch 6's are the ones to get and Batch 7-8 is to be avoided like the plague as a LOT of them are having issues.
Batch 1 uses 1210 W to get 4.86 TH/s = Actual Efficiency: 0.2490 J/GH Batch 2 uses 1160 W to get 4.66 TH/s = Actual Efficiency: 0.2489 J/GH Batch 3 uses 1210 W to get 4.86 TH/s = Actual Efficiency: 0.2490 J/GH Batch 4 uses 1160 W to get 4.66 TH/s = Actual Efficiency: 0.2489 J/GH Batch 5 uses 1210 W to get 4.86 TH/s = Actual Efficiency: 0.2490 J/GH Batch 6 uses 1042 W to get 4.05 TH/s = Actual Efficiency: 0.2572 J/GH Batch 7 uses 1278 W to get 5.06 TH/s = Actual Efficiency: 0.2573 J/GH Batch 8 uses 1293 W to get 4.73 TH/s = Actual Efficiency: 0.2734 J/GH It is all about efficiency 24 hours a day! Looks to me that the Efficiency is going down. Is that actual measured watt usage or what is claimed by Bitmain. My B1 used 1280-1290watts at full blast (Just around 4.85TH. Hmm, that's not that good. My B1 is at 625 with 1230-1235 watts running 5017GH/s 1235/5017 = 0.24616 Very Nice! I think it's nice to but the HW is at 0,01 So would that be a problem on the long run? As i expect to only run it for max a year. |
|
|
|
|
dcejr
Newbie
Offline
Activity: 7
Merit: 0
|
 |
December 19, 2015, 03:24:34 PM |
|
Need Help! I finally got my new 220v outlets installed to start up my S7s today. One of them I got on and configured no problem. The other S7 doesnt turn on at all, no lights, nothing. The power supply sound goes on. I am using the power supplies BITMAIN sells. What are the troubleshooting steps? What are the possibilities that could be wrong? Also whats should the frequency be set for the one that is running, its on the default of 700. Also about how long does it take to get up full speed? Many Thanks! - Dave
|
|
|
|
|
|
J4bberwock
|
|
December 19, 2015, 03:34:20 PM |
|
Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. yes, it should work, but since the resistor in on board, the value you can read will be different from 20k. So as for the good old antS1, you will need to do it by trials and errors until someone check the original value with a 20k resistor on board, and the target value with a 18k resistor (or 16k for 0.57v at the chips) Measured voltage at the output of the coil was 10.12v, so, it's consistent with my estimate of 1.3k resistor somewhere, except that I can't find it for now. I just modded 2 boards, one with 22k resistor, one with 16k resistor. Let's see how it works |
|
|
|
philipma1957
Legendary
Offline
Activity: 4116
Merit: 7824
'The right to privacy matters'
|
|
December 19, 2015, 03:37:35 PM |
|
Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. yes, it should work, but since the resistor in on board, the value you can read will be different from 20k. So as for the good old antS1, you will need to do it by trials and errors until someone check the original value with a 20k resistor on board, and the target value with a 18k resistor (or 16k for 0.57v at the chips) Measured voltage at the output of the coil was 10.12v, so, it's consistent with my estimate of 1.3k resistor somewhere, except that I can't find it for now. I just modded 2 boards, one with 22k resistor, one with 16k resistor. Let's see how it works this should be very interesting I would love to see an s-7 running at .19 watts per gh |
|
|
|
VirosaGITS
Legendary
Offline
Activity: 1302
Merit: 1068
|
|
December 19, 2015, 03:47:54 PM |
|
Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. yes, it should work, but since the resistor in on board, the value you can read will be different from 20k. So as for the good old antS1, you will need to do it by trials and errors until someone check the original value with a 20k resistor on board, and the target value with a 18k resistor (or 16k for 0.57v at the chips) Measured voltage at the output of the coil was 10.12v, so, it's consistent with my estimate of 1.3k resistor somewhere, except that I can't find it for now. I just modded 2 boards, one with 22k resistor, one with 16k resistor. Let's see how it works this should be very interesting I would love to see an s-7 running at .19 watts per gh For now the efficiency is more than sufficient, imo. Especially at the current profitability, but in a year, after the halving when these become equivalent to a S3, this will be a pretty nice bonus to keep them running a bit longer. |
|
|
|
philipma1957
Legendary
Offline
Activity: 4116
Merit: 7824
'The right to privacy matters'
|
|
December 19, 2015, 03:49:24 PM |
|
Ok, so, the "30C" resistor is the 20k reference one. and one of the "123" resistor allows you to output 10.6v. divided by 15 chips in a string = 0.71v at the chips 1.1k resistor in place of the 1.3k will give 0.77v at the chips 1.3k resistor will give 0.65v at the chips 18k resistor in place of the 20k should also work for 0.64v at the chips 22k resistor in place of the 20k will give 0.77v at the chips Edit, I'm aging, took me 20 minutes to figure the over/undervolt. Does that mean i can simply slap some graphite on 30C (20k resistor) to undervolt the Antminer S7? That would be simple and interesting for the long run. yes, it should work, but since the resistor in on board, the value you can read will be different from 20k. So as for the good old antS1, you will need to do it by trials and errors until someone check the original value with a 20k resistor on board, and the target value with a 18k resistor (or 16k for 0.57v at the chips) Measured voltage at the output of the coil was 10.12v, so, it's consistent with my estimate of 1.3k resistor somewhere, except that I can't find it for now. I just modded 2 boards, one with 22k resistor, one with 16k resistor. Let's see how it works this should be very interesting I would love to see an s-7 running at .19 watts per gh For now the efficiency is more than sufficient, imo. Especially at the current profitability, but in a year, after the halving when these become equivalent to a S3, this will be a pretty nice bonus to keep them running a bit longer. yes to be able to drop from .27 to .19 will give them added life. |
|
|
|
|
