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562
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Bitcoin / Pools / Re: [1500 TH] p2pool: Decentralized, DoS-resistant, Hop-Proof pool
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on: December 27, 2015, 08:44:24 PM
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been away for sometime.
where did the hashrate came from ?
good to see p2p hitting blocks !
i'm updating mine to latest & will be back in action shortly.
does nmc merged mining still works ?
anyone having issues with s7 mining on p2p ? i am seeing much lower hashrates, abt 1 ths lesser GRRRRRRRRRRRRRRRRRRRRRRRR !
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568
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Bitcoin / Mining speculation / Re: Next gen Antminer opinions/guesses
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on: December 25, 2015, 09:07:43 PM
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Bitmaintech has no reason to change to new gear until some one has better gear.
So if some One really starts to sell .15 watt or .20 watt gear bitmaintech will bust out a .10 watt item
Til then stand in line for the s-7's
I disagree as this is a race in mining. It'll be too late till someone starts to sell, BMT would wanna sell ahead, there's no reason for them to bust out a newer tech later on. if they do that, it will too late. If I were BMT, I'd love to sell as much as possible in the shortest amount of time especially before halving. SP is coming with SP50 LK is coming with B-Eleven Bitfury is coming soon too & the lists goes on. Ever wonder why the S7's price has been dropping last couple of days same goes to the Jan B9 bulk buy. TBH i foresee a new launch from BMT themselves & competitor which is around mid of 1st quarter of 2016. 16nm race is on. |
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570
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Bitcoin / Pools / Re: [5 PH] Kano CKPool (kano.is) from the cgminer devs [0.9% PPLNS]
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on: December 24, 2015, 04:55:33 PM
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Received my replacement s7 from Yoshi.
4.86, runs like a top.
Only been down for six days.
70 degrees outside here in VA
lucky you, mine is still clearing customs in china. i hope it clears fast enough & get a replacement quick. 2 more s7's coming online. at customs now but due to holiday season will only get it late monday. about time to block heh ? let the wolves out ! |
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572
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Bitcoin / Mining speculation / Next gen Antminer opinions/guesses
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on: December 24, 2015, 04:03:12 PM
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My guess is that BMT is already mining on new HW which is not released to the public yet but could be already in production or in "testing" phase.
What would be your prediction of the specs of the next gen on antminers ?
-Such as it's size/weight/build/power consumption/hashrate/ etc
- me thinks it's going to be in the 10 th/s range, 2000 'ish W, slightly bigger than the current S7, more chips per hashboard.
When will it be launched ?
- My guess end of 1st quarter of 2016
Of course the pricing would be ?
- Ain't gonna be cheap or barely make ROI unless, super CHEAP power or FREE power, 0 or LOW setup cost, prolly near to or at least 5 BTC/miner
Pre-Orders ?
- Yes I think so there's gonna be a month's wait
I hope it will use less PCIE cables, more reliable, I highly doubt that it can get away with noise & heat.
Let's hear it.
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573
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 24, 2015, 11:18:22 AM
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How low can they be clocked from the firmware ?
Id like to know what the S7s consumption at the wall at its lowest setting.
100M is available hahaha maybe u can try & tell us the results ? Sure   100MHz - 241W (2.4W/MHz) 200MHz - 422W (2.11W/MHz) 400MHz - 753W (1.88W/MHz) 700MHz - 1.30kW (1.85W/MHz) 743MHz - 1.39kW (1.87W/MHz) But this really isn't the right PSU to supply 200-400W  TomorrowSoon I'll put up DC watt numbers which will exclude PSU efficiency effects. Just to add in, this is on a S7 B8 on a stock DPS2000BB PSU thx for the results. is it possible for you to up the volt on the dps to +12.5V & some data logging ? @E do u have 162 chip to test ? & some results please if you have. |
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575
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 24, 2015, 09:02:55 AM
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Batch 8 on DPS-2000BB @ 743Mhz:  This is exclusive of the fans. System efficiency will depend on your cooling situation. This works out to just over 0.27W/Gh/s - and the DPS-2000BB can do better with higher input voltage Vac 207.56 Vsupply 12.032 Vchain 10.281 I'll screenshot the miner interface once it's been running for a few hours but this is essentially 4.95TH; 0.016%HW; 60C board temps pump up the volt on the dps, it should workout better & can go either higher or lowers the HW errors for sure. ah i just saw it's a B8 hmmm but good to see some diff #'s. i saw on phillipmas post & j4b's post they went higher with higher volts but of course it's the earlier batches. i'm still happy at stock clocks but after the 90 days, he he he he ! |
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576
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 24, 2015, 08:40:53 AM
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Hi Everyone.
So normally I wouldn't rant about support topics, But I have 2 major issues I have been trying to resolve over the last few days with no joy.
Now I will start by saying bitmain have normally been really good and solve issues quickly, but I don't seem to be getting anything resolved at the moment so any advice would be much appreciated.
The first issue I have is that my latest S7 that is currently sat in customs has an invoice attached saying the value of the 1x S7 is $30,000 and they want £5000 for the VAT.
Now as far as im aware the S7 I ordered should be valued at $1650 but it seems that there has been some sort of admin error on bitmains side, I did receive an email from bitmain stating that we needed to pay our VAT or the machine would be sent back to them, I advised them of the issue and they sent over the correct invoice to me, but Fedex have request an explanation from bitmain and a copy of the invoice directly from them, so far fedex has not received a response and neither have I.
The next issue im having is with one of our current S7 machine from batch 5 has an issue, I checked all my machines the other day and noticed a very strong electrical burning smell and noticed 2x hashing boards had gone down.
I assume they have died but cannot check as there is a warranty sticker over the machine that I do not want to touch without the permission from bitmain, So far I have emailed info@ sent a message through zendesk and also messaged zendesk when live support was available and have so far received no response.
I feel a little ignored and for the first time in 2 years im annoyed at the way Bitmain is dealing with my issues, we have easily spent well over $30,000 with them, not much compared to some bigger miners but enough to think they would as least help.
Like I said I have been more than happy with Bitmain products and there support in the past, but feel very ignored at the moment, and any advice would be greatly appreciated.
The thing that really bothers me about the S7 is the new Bitmain warranty policy stating that if anything burns on the board, there is no warranty. It's likely that they wanted to avoid replacing boards overclocked/modded, but it also prevent honest users like you, who either got bad luck, or falling heatsinks (engineering failure) for example, to get warranty. I hope they will reconsider it, at least for the defects caused by falling heatsinks. If I'm not mistaken, on a batch 5, there shouldn't be any buck converters, unlike the 135 chips units. So the most likely dead components are an asic, a capacitor, or one of the small LDOs creating the communication voltages (usually 1.8v). You can start by shaking the unit to check if you hear a something like a heatsink that went loose. If that's the case, you can remove one fan without losing the warranty to confirm. You can try to negociate with them if it's a heatsink issue because there is no way they can take you as responsible for it. Other burnt parts can be caused either by a user overclocking the unit to death, or simply by one bad component in a batch, so it's a bit harder. If they are totally out of warranty, I'd be interested to grab one board shipped to France for experimenting. Even though Bitmain's policy states no warranty for burned boards, Bitmain replaced 2 of my burned boards from B1 for free including shipping both ways. I didn't open the miner on my own, I emailed them that two of the boards don't hash. They asked me to open the miner and check the boards. I found loose heatsinks and burn marks. Turnaround time was less than a week after I mailed the boards. This is a good example of customer service by Bitmain. I hope to see more experiences like this shared on the forums. While I do not like to see bad experiences we need to hear about those as well, but if you are having a reasonable response such as this, please make sure you share it! It shows improvements by bitmain, and we need to know. Please tell us the step by step. Who you contacted and how, and who took care of your issues, sent the RMA, etc. It may help others immensely. Thank you for sharing. I am impressed the way Bitmain handled my warranty claim. I sent an email to info@bitmaintech describing the issues I was having, only 1 out of 3 boards worked out of the box. Wrote order number and problem on the subject line. Also added type of power supply I was using, in this case a Bitmain 1600 watter, sent a picture of input voltage with a voltmeter just in case. Got a reply from Sherry Liu, she asked if I opened the miner yet, if not open and inspect. I found loose heatsinks and burn marks on the boards after opening up the miner. I sent pictures to Sherry. She approved the RMA and sent me prepaid shipping labels. Note because of time difference it is not fair to expect a reply within an hour or two, wait at least 24 hours or longer depending when you sent your email. After shipping out the boards, replacement boards were at my doorstep in 7 days. I ordered more than 10 S7s from Bitmain and this is the only S7 that gave me trouble, they are all hashing at their advertised speed or faster. Also it is good to be polite, I am sure Bitmain didn't mail a defective miner, things get rough during shipping. my case is also handled by sherry, yes i agree be patient with her, but she does reply within 24 hours or so & she even replies after office hours. once she replied me past 9pm china time. now it's my turn to wait. package is clearing customs. let's see what does bmt engineers say. miners not oc'ed at all. i hope it gets fixed or replaced asap. |
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577
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Bitcoin / Hardware / Re: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH
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on: December 23, 2015, 08:32:10 PM
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As a quick FYI, in my limited experience the bitmain PSUs are a good 5% more efficient than the 2000w DPS's.
you must be pretty limited then  no facts, #'s, or anything to claim your "limited" experience. back to s7 topic, i have a board sent to bmt too, now waiting. everything looks good no loose heatsinks, so far nothing burnt (that i can see visually see) but bmt says: *in every reply* "Engineers will double check the issue after they get them and confirm whether it's due to the boards themselves or improper use. if the boards are burnt due to improper use ,you may need to cover the repair cost." me no likey the BOLD  |
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579
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Bitcoin / Hardware / Re: Here's a converter that will turn your 120 volt US plug into 220 volt plug.
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on: December 23, 2015, 12:02:05 PM
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gives u the vlots but NOT amps ! that thing will either melt or blow up in no time.
Well it says 2500w, so running a single S7 might be doable, but in the best case scenario, you're raising your costs for nothing. I don't see a gain on using this and you're just adding one more iffy Chinese thing that can burst into flame. edit : not for 24/7 use & yes it has a VERY good chance of bursting on to flames & hopefully not burning the house down for home miners. |
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