In my opinion, I think it's safe to finally say that the industry is killing itself. Since Bitmain is the undisputed champ in the manufacture of the mining wars, they have serious weight and influence over the difficulty and hashing contribution to the network. Before this recent s7 mayhem, you'd be able to ROI and maintain some reasonable level of difficulty so you can rely on a certain level of revenue over time. But now, it's impossible to calculate and scale effectively.
For example, I ordered my s7's in the middle of November. On November 11th, the difficulty was 65million. Less than 3 months later, the next estimated difficulty hitting in 3.2 days, is 144 million (more than double). But the price of bitcoin hasn't doubled during that same time frame either.
Furthermore, each new batch of miners is significantly cheaper than the last. The batch 7 miners I bought cost me roughly $1450 each. 3 batches (and 4 months later), the price is half that.
So how can a bitcoin miner be able to predict an ROI anymore? It's impossible.
I see the antminer s7 price drops as a sign that bitmain doesn't care about bitcoin, or the miners anymore. They care about making money and adding as much hashing power as possible. Because lowering your s7 price by 50% within 3 months when you know the miner who bought 3 months ago didn't make $750 in bitcoin during that same duration of time, is just plain wrong.
This is the sad state of affairs for miners now. You used to be competitive for 6-12 months with equipment. Now, you're not even competitive a month later. And with resale values kept low in the interim, since bitmain is still selling versions for 50% less than what you paid, we're stuck between a rock and a hard place.
you should not blame Bitmain for your decision to buy overpriced miners and not being able to predict reaslistic ROI times No but really, Bitmain did a pretty good "fleecing" on this one! Bitmain used to sell their miners with a 3-4month payback window (estimated). With the S7 all of a sudden it was 6+months? But we still bought em! Then of course instead of the 5-6% growth rate required to actually ROI all that goes out the window with a little BTC/$ spike and Bitmain dropping the price to 50% so they can just keep selling! Then doulbe digit increases again. Brilliant! At this point when I bought the S7 I did it mostly to lower my power costs over the SP20/S5, but I knew it probably would never ROI. Mining has pretty much been for "suckers" past the GPU days. |
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so even with the HST code on my fedex shipment under my street address, and EIN/Tax ID and under shipment notes for Batch 8 and 9 I just received a bill in the mail from fedex for 35 bucks for the customs fees.
so I think the HST trick is either hit or miss, or completely useless
$35 "fee" as it was described to me was just the cost for them to inspect the package/confirm contents if they choose to do so, regardless of the code. I've used DHL, Fedex, and UPS for Bitmain and the best way to slide under the radar is to simply order 1 miner at a time so the value "looks" as low as possible on the shipment. However with that said I had video cards shipped from Canada to US which is definitely a "free" item and was also charged in the past. |
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Damn I just bought a 4670K off eBay yesterday for a bit cheaper than that, but was looking for a 4690K with Bitcoin as payment - wish I would have looked here first!
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Bitmain S7 is 0.25 J/GH. Bitfury claims this chip is 0.07 J/GH on the high end, 0.055 on the low end! Interesting to see how this plays out. With the 18% estimated diff jump on the horizon, S7 buyers are getting hosed. I should have quit mining when my Classic Avalon Batch 3 only returned 50BTC at a cost of 100BTC  |
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I was about to order the batch 8 but now I am having second thoughts about ROI. Even with free electricity, the analysis here https://tradeblock.com/bitcoin/mining/a/JzZtkWrbEJb3LeJj28EoCkshows that I would ROI on August 2016, assuming starting mining on January 2016 and ~5 billion difficulty increase each month (best case scenario). (purchase cost ~$2000, including PSU and customs fees) Keep in mind that bitcoin halving will be about July 2016. So why would someone buy a S7? You are betting on 5% diff increases? Only with Bitmain throwing shittons of HW out the door are we seeing that much. They won't be putting gear online @ 5% for that many months at least! |
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Every batch is a different price and speed.
I love their fixed Price=HashRate pricing.
Yeah 1BTC per TH. Problem is, with these crazy diff increases upcoming due to the large amount of orders when S7s hit around 3.5/4BTC for 4.6TH those sitting on BTC ready to re-invest it in mining bought a crap-ton of miners. We haven't seen the worst of the difficulty ramp yet I'm afraid |
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But they would have received this money from me, if they had a product what to sell. But they have not.
And now they are playing with millions.
At this point they wish they were playing with millions. They killed themselves with the SP20. "Killed themselves" with the SP20?" Can you explain more? It wasn't profitable enough? |
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I kind of lost track. What was batch 4 rated at? And if it was a 4.6 miner what was the 4.8 batch that was selling along side? Was it batch 5 or batch 3?
Batch 1 - 4.86, some slower Batch 2 - 4.66 Batch 3 - 4.86 alongside batch 2 Batch 4 - 4.66 Batch 5 - 4.86 alongside batch 4 Batch 6 - 4.05 preorder for December Woohoo my B4 shipped also! I bought Batch2/4 just to save a little on BTC and power draw and it seems like the "slower" 4.66 batches always shipped out promptly. My B2 shipped fast, was all Rev 1.4 boards, and performs amazingly well. "ANTMINER BATCH 4 is with 4.66th/s hash rate and shipping may start from Nov. 23~Dec. 3" Bitmain BEAT the estimated ship date by full week from the earliest estimate! Go Bitmain! |
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Dude. Buy a KILLAWATT meter at harbor fright or something! You have to know wall watts if you load it that close to the max!
Depending on the efficiency of that PSU you could have been drawing 620W for the S5 and 380W for the S3 for a total of 1100W (@ the wall)!
I always try to shoot for at least 10% LESS from the wall than the PSU ratings, if its a good supply. (ie 1200W wall draw on a quality 1300W PSU would be the maximum I would go, 1300W max should be the DC number before conversion so theoretically you could go 1400W+ from the wall but 100% loading 24/7 is a great way to blow out a PSU as you just found!
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Man BTC/$ is going the opposite direction right now than I would hope, ugh. I was going to offer 10BTC for both but that's a bit under your asking price I do understand. Unfortunately with 4BTC/4TH direct-from-Bitmain-here-in-30-days I can't really offer more!
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I picked up 2 Antminer S7's from my friend that was planning on splitting cost in my new farm. He bought them from HolyScott at HolyBitcoin. They were tested by HolyScott and mailed to my friend. He has not even opened the boxes since they arrived about 2 weeks ago. They do have the USA warranty.
I am sure HolyScott will verify the above if asked.
I am going to pick them up from his house Tuesday or Wednesday and will post pics at that time.
If they do not sell I will add them to my farm but I am trying to go with all Avalon6 and would prefer to sell them.
I am asking $5000 shipped CONUS for the pair.
Thanks
I would say 2 weeks is basically 1BTC lost thus far, get those two mining! These 4.66 or 4.86 TH models? |
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Is there any way (in the software) to determine the voltage being supplied to the hashing boards?
good question don't know. I use a dmm and test all 9 pcie jacks. I would think if it was in software you would get 1 reading for each blade. that is okay if your hash rate is good and all 9 jacks are giving 11.9 or more volts. I have found that testing each pci jack while every jack is under load is the only way to be sure you don't have a psu issue. Really test every PCIE Jack? On a single-rail PSU I would think as long as all the connections are solid you should see the same voltage on all. Now if you are using a multi-rail PSU, then yeah you have to test every lead. But then again if it were me I'd toss a multi-rail PSU anyway as I played that game back in the GPU days and load-balancing was no fun when you are mixing/matching rails. Manufacturers often hide the rail configurations so you are left guessing, and normally dedicate one rail to the mobo connector so that becomes worthless! Long story short: I love my 1300W 108A@12V PSUs. Worth every penny! |
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wicked, but I am wishing for a 15-20 min btc plunge to $325-350, followed by a swift recovery, of course. It would allow me to get B6. Currently ~$1599 shipped, but $1350 (at btc $325) or $1450 (at btc $350) shipped would be so much better.
Hmm that PSU is 87% efficient.
But S5s "burned up" if you ran them with too low of volts? Interesting.
I have my old Rosewill Lightning 1300W PSU running my 4.66TH S7, seems to be doing fine even though I only have a dedicated 20A 120V circuit. PSU outputs 12.18V under full S7 load!
The lightning 1300 should do fine. I got one long ago on a rebate deal. It's one of the nicer ones Rosewill makes, some of theirs are utter crap. But the lightning is high enough they made it good quality I would say. Mine I cant remember date i got it but it has to have been running about a year or so I would guess. Rosewell 1300 has 8 PCIE connectors. Are they all single headed or doubles? It is 4 X 2's. I had to go out and check I could not remember. It's a good PSU has been running 2 underclocked SP20's. But it's definitely not enough PCIe's for a S7. No its actually 4x1 + 2x2, so 8 connections total but really 6 dedicated/usable in the case of the S7. I just did an extension on one of the 2x2 to make the other end reach the fan PCB. I think the Rosewill Lightning 1300 is perfect for S7, and keeps it within the >12V requirement. I guess not all G2 1300 are above 12V? |
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Bought a S7 from Batch 5 I have two EVGA Supernova G2 1300 watt PSU's I want to use with it the question is The S5 when using one PSU only measures 11.88v on the PCI-E Connectors when Under full load "HASHING" no overclock does anybody think if I use two PSU's on the S7 will it give me a problem ?
Question 2: what does the S7 do when it don't get enough voltage does it BURN UP like the S5 ?
Question 3: Are there any 1500 watt 12vdc to 15vdc variable output server PSU's out there if so what's the link ?
this one goes from 10 to 13.5 https://www.trcelectronics.com/ecomm/pdf/rsp1500.pdfI have been using it here and there. A guy on ebay was selling them at a good price http://www.ebay.com/itm/MeanWell-Power-Supply-Rsp-1500-12-/191732204742?Hmm that PSU is 87% efficient. But S5s "burned up" if you ran them with too low of volts? Interesting. I have my old Rosewill Lightning 1300W PSU running my 4.66TH S7, seems to be doing fine even though I only have a dedicated 20A 120V circuit. PSU outputs 12.18V under full S7 load! |
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Wow 3.8BTC for the next batch now. Crazy.
Those who paid 8 BTC or heck even my S7 I paid 5.8BTC for that shoud arrive tomorrow costs too much!
How high is BTC gonna go on this run? Some people may get some sweet deals on S7s but its going to screw the early guys that's for sure!
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Thanks all for the interest! Worked a deal out with Blaze that is pending, couldn't resist his offer to deal with shipping and plus since he wants the PSUs that saves me the trouble of eBaying a dozen+ of those!
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Only thing is, I for one do not need PSUs as we have a bunch of server PSUs we use and prefer immensely over consumer ATX PSUs for various reasons.
I understand that... When I had much quieter (and undervolted) Antminer S1s the nearly-silent consumer grade ATX PSUs were a nice choice though! Now that everything sounds like a jet engine the advantage has kind of been lost! Anyway Blazed and allinvain you both have PMs on the requested details. Thanks! |
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what a shame you aren't closer for local pickup. After you add in shipping to Canada or the East Coast these miners could become pretty expensive. Agreed However I have found that sometimes carriers give deep discounts under certain circumstances, as for example the price to ship via eBay/Fedex is a lot cheaper than the same item going to fedex.com. So if there was a single buyer, I do have a lot of larger boxes saved up that could be used to ship multiple miners and reduce costs. That and I had planned on signing up for a free 30 day trial of shipstation.com which I believe would let me tap into those discounts also, but as always YMMV with shipping costs! |
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Where are you shipping from? US?
Pacific NW, USA |
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I have:
3x SP20e Jacksons I run @ 1.4TH (tested to 1.5-1.6TH at one time, settled on 1.4 for power draw reasons)
2x Antminer S5s @ 1.2TH
Asicminer Prisma v2 @ 1.35TH (with controller)
2x RockMiner R3 boxes (900GH total) - R3s are a free bonus if you can take the lot! (includes rasbpi, these are temperature sensitive)
I can do 1.2BTC per SP20 and S5, with the Prisma/R3 bonus being 1BTC for both (~2.2TH). Shipping will have to be calculated separately depending on zip, weight, etc (have all original boxes). PSUs I can part with for 0.15 BTC each (all Corsair TX 650).
Total hashrate for all gear is over 9TH!
Looking for anyone who can take the whole lot! Please no threadcrappers. Long time miner/trader here on the forums. Thanks,
- jermwerty
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