Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 101. (Read 528055 times)
January 08, 2016, 06:57:14 AM
Yes, wattage info would be good. What is the highest anyone OC to while able to keep it stable? IF it's that Linear, it sounds like there's a ton of OC potential, just not sure if the wattage increase is also as linear.
January 08, 2016, 05:46:12 AM
Here are all of the measurements put together:
Calculation would be TH/s per MHz:
4.933TH / 731MHz = 6.748290013679891
4.867TH / 725MHz = 6.713103448275862
4.730TH / 700MHz = 6.757142857142857
RESULTS: You get more TH/s at 700MHz. The only other consideration would be the Wattage per TH/s. Very good HW, but be cautious on the temps.
hashrate and frequency are linearly related, with a fair share of variance too.
technically your above image shows a better average hashrate (the 5s hashrate can vary greatly)
4.911TH / 731MHz = 6.718 (based on 30hrs)
4.867TH / 725MHz = 6.713 (based on 40hrs)
The theoretical multiplier for a 135 chip S7 is 6.75, so that should give the max possible hashrate for a given frequency.
750MHz x 6.75 = 5.053TH/s
725MHz x 6.75 = 4.894TH/s
700MHx x 6.75 = 4.725TH/s
Rich
Thanks for the corrections on this! The BIG overlying piece of information is missing...wattage
January 08, 2016, 03:36:59 AM
Here are all of the measurements put together:
Calculation would be TH/s per MHz:
4.933TH / 731MHz = 6.748290013679891
4.867TH / 725MHz = 6.713103448275862
4.730TH / 700MHz = 6.757142857142857
RESULTS: You get more TH/s at 700MHz. The only other consideration would be the Wattage per TH/s. Very good HW, but be cautious on the temps.
hashrate and frequency are linearly related, with a fair share of variance too.
technically your above image shows a better average hashrate (the 5s hashrate can vary greatly)
4.911TH / 731MHz = 6.718 (based on 30hrs)
4.867TH / 725MHz = 6.713 (based on 40hrs)
The theoretical multiplier for a 135 chip S7 is 6.75, so that should give the max possible hashrate for a given frequency.
750MHz x 6.75 = 5.053TH/s
725MHz x 6.75 = 4.894TH/s
700MHx x 6.75 = 4.725TH/s
Rich
January 08, 2016, 12:30:05 AM
you think those temps are okay?
I don't but maybe I am wrong.
I don't but maybe I am wrong.
Batch 8 with a slight OC. Anything higher raises the errors above .01
Here are all of the measurements put together:
Calculation would be TH/s per MHz:
4.933TH / 731MHz = 6.748290013679891
4.867TH / 725MHz = 6.713103448275862
4.730TH / 700MHz = 6.757142857142857
RESULTS: You get more TH/s at 700MHz. The only other consideration would be the Wattage per TH/s. Very good HW, but be cautious on the temps.
hashrate and frequency are linearly related, with a fair share of variance too.
technically your above image shows a better average hashrate (the 5s hashrate can vary greatly)
4.911TH / 731MHz = 6.718 (based on 30hrs)
4.867TH / 725MHz = 6.713 (based on 40hrs)
January 08, 2016, 12:29:05 AM
is https://bitcoinwisdom.com/bitcoin/calculator a good place to calculate ROI? i keep messing with this thing and still cant find ROI.....everytime i do it im in the hole $700+ after 200+ days. these things need to be cheaper. and with the reliability issues of late, i think im better off just buying a bunch of btc and seeing if it increases in value over those 200 days...when stuff lasts 2 weeks and burns up or fails..... that means it is total crap!
I'm curious... Does your electricity rate per kWh need to be cheaper?
5.9 cents a KW. which is low for most of the USA....
And you can't see ROI?
Can you not see future price of bitcoin going up considerably just before the block halving?
Of course, I have plans on moving soon to an area with $0.0285 to $0.0325 per kWh. That's the main reason I'm loading up on rigs. However, I'm not moving until I have 200+ S7's. It could be end of July [After block halving] or it could be the last quarter of 2016. It depends on how certain things play out as to the timing of my move.
Where are you looking to move that has those low electric rates?
January 08, 2016, 12:26:32 AM
Hehe, my Avalon 6 loves to run in the 72-76 range even when the garage is very cool and the S7 in the same ambient temperature would be running in the 58-62. =)
January 08, 2016, 12:21:45 AM
^honestly, the chips can handle >70C without much issue, I imagine the 80C shutdown is more for incidents (such as the fan failing or getting obstructed), but that if you used it properly they could likely run stable at up to 90C for days or weeks without failing.
The dangers come from rapid thermal changes though, such as a chip turning on/off, or the fan ramping up and down. thats when the solder and glue fails most easily.
The dangers come from rapid thermal changes though, such as a chip turning on/off, or the fan ramping up and down. thats when the solder and glue fails most easily.
January 07, 2016, 11:50:31 PM
you think those temps are okay?
I don't but maybe I am wrong.
I don't but maybe I am wrong.
Batch 8 with a slight OC. Anything higher raises the errors above .01
I would want to know ambient temp. But that is getting up there. What does it run not OC'ed??
I to think it is most likely to high. I don't think Batch 8 was made to OC as much as some might want it to, it simply is already very high on frequency. And it's sure not worth losing warranty for a slight OC.
The room this is in has an AC unit which blows outside air all day which is cold during the day and very cold during the night. The temps in that room get up to about 73-75°F in the afternoon which is about when that screen shot was taken. Here it is now. Fans are at 60%. It is only a couple hours in the afternoon when the hashing board hits the low 70's. It will be below 70 in another hour or so.
Here is a batch 5 with fans at 60% sitting next to it.
I could bring the temps down by raising the fan speed. There is also an oscillating fan in the room and I have found that by pointing it at the shelf with the miner intakes I can lower the temps also but I didn't really think a few hours in the low 70's was a big deal.
Likely a few hours you are right did not do any damage. It would need to be more long term I think for it to take effect.
But with bitmains current policy if you are caught you lose warranty over a little bit of speed increase. That is part I don't think it is worth even though chances of being caught are slim..
January 07, 2016, 11:00:48 PM
maybe your IBM 2KW PSU is a bit too old....
i have an dps1200bb that is eating 820watt on one miner, i change the psu and the same miner is ''eating'' 770watt!
i have an dps1200bb that is eating 820watt on one miner, i change the psu and the same miner is ''eating'' 770watt!
January 07, 2016, 10:50:10 PM
Me = Not.You, so I don't know who I'm asking...........as I'm asking "Not.You"
I'm curious why my EVGA G2 1300W is handling the S7 OC better than my IBM 2KW PSU especially since it's pulling way more than 100% of it's power capacity as the S7 is pulling much more than 1450W at the wall.
I'm curious why my EVGA G2 1300W is handling the S7 OC better than my IBM 2KW PSU especially since it's pulling way more than 100% of it's power capacity as the S7 is pulling much more than 1450W at the wall.
January 07, 2016, 10:44:50 PM
What PSU are you using? I noticed I was able to get 4900-4950 with EVGA at 731M but only 4850 with the IBM 2K PSU for 2 S7
If you are asking me I have EVGA 1600's on my S7's.
January 07, 2016, 10:23:37 PM
What PSU are you using? I noticed I was able to get 4900-4950 with EVGA at 731M but only 4850 with the IBM 2K PSU for 2 S7
January 07, 2016, 09:56:56 PM
you think those temps are okay?
I don't but maybe I am wrong.
I don't but maybe I am wrong.
Batch 8 with a slight OC. Anything higher raises the errors above .01
I would want to know ambient temp. But that is getting up there. What does it run not OC'ed??
I to think it is most likely to high. I don't think Batch 8 was made to OC as much as some might want it to, it simply is already very high on frequency. And it's sure not worth losing warranty for a slight OC.
The room this is in has an AC unit which blows outside air all day which is cold during the day and very cold during the night. The temps in that room get up to about 73-75°F in the afternoon which is about when that screen shot was taken. Here it is now. Fans are at 60%. It is only a couple hours in the afternoon when the hashing board hits the low 70's. It will be below 70 in another hour or so.
Here is a batch 5 with fans at 60% sitting next to it.
I could bring the temps down by raising the fan speed. There is also an oscillating fan in the room and I have found that by pointing it at the shelf with the miner intakes I can lower the temps also but I didn't really think a few hours in the low 70's was a big deal.
January 07, 2016, 09:55:20 PM
RESULTS: You get more TH/s at 700MHz.
No, you clearly do not "get more TH/s at 700MHz". Perhaps you mean something else?
Quote
The only other consideration would be the Wattage per TH/s.
This is one of the only real considerations.
January 07, 2016, 09:32:16 PM
Would be good to know the wattage used as well to know if it's worth the small jump. I guess you guys are lucky, all my B8 S7 if I change to 731MHZ, I would get at least .02 error rates.
January 07, 2016, 09:05:53 PM
you think those temps are okay?
I don't but maybe I am wrong.
I don't but maybe I am wrong.
Batch 8 with a slight OC. Anything higher raises the errors above .01
Here are all of the measurements put together:
Calculation would be TH/s per MHz:
4.933TH / 731MHz = 6.748290013679891
4.867TH / 725MHz = 6.713103448275862
4.730TH / 700MHz = 6.757142857142857
RESULTS: You get more TH/s at 700MHz. The only other consideration would be the Wattage per TH/s. Very good HW, but be cautious on the temps.
January 07, 2016, 09:05:26 PM
you think those temps are okay?
I don't but maybe I am wrong.
I don't but maybe I am wrong.
Batch 8 with a slight OC. Anything higher raises the errors above .01
I would want to know ambient temp. But that is getting up there. What does it run not OC'ed??
I to think it is most likely to high. I don't think Batch 8 was made to OC as much as some might want it to, it simply is already very high on frequency. And it's sure not worth losing warranty for a slight OC.
January 07, 2016, 09:04:17 PM
Is this a good FAN replacement? Anyone use these before? They use up to 36W.
http://www.amazon.com/Sanyo-Denki-SAN-Ace-120mm/dp/B00QWB1X3O/ref=pd_sim_sbs_147_1?ie=UTF8&dpID=518LC-uCGVL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1RZ2VDWHQX0M6T6AT3D1
http://www.amazon.com/Sanyo-Denki-SAN-Ace-120mm/dp/B00QWB1X3O/ref=pd_sim_sbs_147_1?ie=UTF8&dpID=518LC-uCGVL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=1RZ2VDWHQX0M6T6AT3D1
January 07, 2016, 09:03:01 PM
does bitmain still have a warranty place in the USA? I remember when i had my S5's they had warranty services on the USA out of colorado i think. anyone know if they still do warranty stuff or is it all china now?
Edit: found "BitmainWarranty" on here. in there sig it says you can return stuff to CO
Bitmain Tech Support & Warranty: +1-844-BIT-MAIN (844-248-6246) Skype: BitmainEnglish (Voice Only)
E-mail: [email protected] Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA
Edit: found "BitmainWarranty" on here. in there sig it says you can return stuff to CO
Bitmain Tech Support & Warranty: +1-844-BIT-MAIN (844-248-6246) Skype: BitmainEnglish (Voice Only)
E-mail: [email protected] Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA
I don't think that will do you any good as far as returns. You might speak with them on phone, but you will still be RMA'ing to China.
There are some who have claimed to buy from them and pay extra and are able to use them... but I was not ever 100 percent sure on that. But you can ask them I'm willing to bet they still have you ship it from china.
*Edit looks like hawkfish007 confirmed this
January 07, 2016, 09:02:16 PM
does bitmain still have a warranty place in the USA? I remember when i had my S5's they had warranty services on the USA out of colorado i think. anyone know if they still do warranty stuff or is it all china now?
Edit: found "BitmainWarranty" on here. in there sig it says you can return stuff to CO
Bitmain Tech Support & Warranty: +1-844-BIT-MAIN (844-248-6246) Skype: BitmainEnglish (Voice Only)
E-mail: [email protected] Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA
Edit: found "BitmainWarranty" on here. in there sig it says you can return stuff to CO
Bitmain Tech Support & Warranty: +1-844-BIT-MAIN (844-248-6246) Skype: BitmainEnglish (Voice Only)
E-mail: [email protected] Teпepь cepвиcнoe oбcлyживaниe дocтyпнo нa Pyccкoм и Укpaинcкoм языкax!
Return Address: Bitmain Warranty 3700 Quebec Street, Unit 100-239, Denver, Colorado 80207, USA
This is the reply I received trying to process warranty claim locally
"If you have received the S7 with a letter inside the box stating to contact staffs in China, you must process your warranty via [email protected]
If you need technical assistance, we can assist you via US/EU or from Ukraine with English Speaking Staffs.
If you don't hear any response for another day, please let us know
Thank you"
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