Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 347. (Read 528055 times)

No, I honestly don't think the difficulty will drop.  It WILL rise.  I'm only counting on the price of bitcoin to rise exponentially come spring time.  It's counter intuitive for the big boys to get into a hash rate war at present price of bitcoin.  It's more productive for them to replace old gear with new gear without raising the difficulty exponentially at the moment [In my opinion].  

So yes, I expect the difficulty to go up to approximately 70 billion by December and 90 billion by spring next year.  But I'm also expecting the price of bitcoin to rise with the difficulty, however, a delayed rise along with it.  The price of bitcoin [Percentage wise] will not rise the same amount at the same time.  There will be a delay in the rise of bitcoin price until the spring.  I expect a significant rise in price in June [Just before the block halving].  If I don't see that significant rise in June, it's time for plan B or C.  If we do have significant rise, it's probably time to sell the rigs on eBay at very close to the same price as what I paid for them.  Why close to the same?  Because BITMAIN will have the price of the S7 much higher at that point in time if the price of bitcoin is significantly higher in proportion to the difficulty.  

It's just a gamble I'm making.  I'm not going all out with my money.  As I'm using money to invest in things other than bitcoin (E-Cigs).  I'm only gambling with a portion of available funds.  There are always risks in investments.  Some more than others.  Usually, more risk means more returns if it pans out.  I always say, when gambling, "Never invest what you're not willing to lose and never invest more than 10% of your bankroll into a game." Also, "Never have all your eggs in one basket."

I would be willing to bet that BITMAIN and other big players will have a new rig waiting just for what I'm talking about with the rise in bitcoin price in June.  It would be foolish for us to think they won't.  That's where I believe the mining side of bitcoin will get very competitive for a while.  That's when I believe will be the best time to sell my rigs or just before it.  It depends on the price of bitcoin at the time.

If you indeed think the difficulty is going to drop that certainly makes my assumptions pessimistic, so that is a fair point, although I'm still assuming zero cost for electricity, PSU, etc...

Thank you for your thoughts, you raised some interesting points.

Built in my recreation room downstairs just for home mining:



ALL of this gear is gone now awaiting S7's:  [That is black spray paint on the wall inside the mining closet.  It was as good of a place as any at the time to do some painting].  Five (5) 240V/30A circuits provide power for the Five (5) 240V/30A PDU's.  Two of the PDU's are mounted to the ceiling joists out of the picture.  Don't mind the orange 10/2 wire hanging down.  That's another 240V/30A line I was running that was not completed yet at the time of the photograph.  I had more hardware (S5's) that were put into use on the left side that were not set up yet at the time of the photo.

As you can see... I already have the 220V to 240V outlets with PDU's and I have several Corsair Platinum 860 watt PSU's.  What you don't see in this photo are the 19 IBM 2880W PSU's.  Four of the IBM 2880W PSU's were being used for the 15 SP20's.  The rest are out of the picture.  So, I'm not spending any extra money on outlets, wiring for outlets, PDU's, PSU's, ethernet cords or PCI-e cords.  I already have the peripherals.  I only need the rigs.

The 14,400 CFM exhaust fan is plenty for my present needs of getting the heat out.



This photo was taken during the initial setup of the hardware.  I'm adding it only to show the size of the mining closet inside:

I saw the same thing in my calculations as well.  However, I'm going to take a bit of a gamble.  I have my thoughts about the difficulty between now and the block halving that I do not wish to share here.  I also have my thoughts about bitcoin price in the spring and about a month out from the block halving.  The power costs per GH/s is not as high as it used to be on previous rigs.  I'm actually paying for the power out of pocket and holding on to the bitcoin mined.  There's a chance I might sell the rigs one month away from the block halving.  I won't know until that time.  I will get money back when the rigs are sold on eBay.  How much?  Who knows...  I only want to be in position if we have another pump like we did November of 2014.  

If bitcoin price rises, so does the price of the rigs.  I could potential sell the rigs at the same price (used), if not more, on eBay if that scenario works out.  It's all about timing in my opinion.  The next ten months will be very interesting indeed for bitcoin and for mining.  I had to have "something" in the game.  I might lose a little or I might make a lot after selling bitcoin mined later down the road and selling the rigs at a potentially higher price on eBay.  Who knows?  Only time and a little luck will tell us.  Depending on difficulty, I may buy 14 more S7's in December to be prepared for the spring.

I have my thoughts about price of bitcoin and difficulty, just as I'm sure you have your own.  As for who's will be correct as time passes???  Only time will tell.  Some might say, "Buy bitcoin instead of rigs."  I'm a gambler.  I'm going to try to mine the same amount of btc I would have bought and sell the rigs for a little extra profit once I'm finished.  That's the plan anyway.  You can try to sway others to avoid what I'm doing.  That's fine.  I don't mine.  It's a little late to sway me; as I have already purchased 9 of them.  You might sway me from purchasing 14 more in December.  Only time will tell.  I'm open minded.

i 100% agree.. the s7 is too large for a home miner.. you have to get special outlets if you already dont have 30 amp or 220 outlets. takes 2 high end or one large expensive power supply.
you would be lucky if you break even on cost before the block halfs.. if you dont you might not ever.. its not like the price of btc will double overnight..


bitmain should have made smaller home miners, maybe one of the s7 hash boards. i would have replaced my s3s with one of those.

people whit money like to spend money 

Serious question. Why are people buying these. I just did a quick break even calculation and assuming zero electricity costs, not including the PSU cost, and zero difficulty increases you break even in about 190 days. Obviously those are very favorable assumptions, probably very unrealistic.

Not criticizing the product, just really curious about it, since I mined for a very long time (before finally giving it up last year), and I've bought Ant Miners before, but I now find myself scratching my head. The numbers these days just don't seem to make sense to me.

Yes, they did say that.

I wish I would not have hesitated myself and just ordered on the first day.  However, I waited until the 9th of September.  So, it may not be until the 9th of October before I receive them.  It's all good though.  I'll remain patient.

Long time lurker here. Thought I would chime in. I ordered a dozen S7's in three different batches. The four I ordered on 8/31 have all shipped and been delivered (I'm located in the Eastern US near DC). They are up and running and hashing away. The batch I ordered on 9/5 and 9/8 have not yet shipped, so I imagine Bitmain is still in the early stages of getting those pushed out the door. They do say on their order page that shipments made up thru Oct 10th would not be considered late, but I certainly hope they don't take that long. Every day really counts now.

I believe they are shipping them on a first come first serve basis determined by "when" someone placed their order.  I can see where confusion can come into play if multiple items are ordered and they ship only part of the order then mark it "shipped."  I had purchased multiple S5's several months back and had to send two of them back about 3 days apart from one another.  When they shipped units back to me there was some confusion about how many S5's I sent to them and it took another week to get the second S5 shipped back to me.  It all got worked out in the end and I was happy.  I got a BITMAIN T-Shirt to boot for the confusion.

All in all, BITMAIN is a damn good company.  If issues arise during the warranty period, they do their best to make things right in a timely manner.  I'm thankful they put up with some who speak ugly things about them.  They still sell quality hardware to us despite some of the ugly words.  It's much appreciated.  They don't have to put up with us at all nor sell to us but they do and we don't have to buy in bulk.  We can buy only one unit if we like.  

They are willing to invest in staff who will respond to support issues that may arise from buyers within and after the warranty period.  I think Spondoolies and others saw this as a headache and that is part of the reason they have chosen to sell only in bulk to avoid having to hire more staff to handle the load from so many buyers for support purposes.

To be honest, I don't mind if my rig is 5% less than stated hash rate.  Plus or minus 5% is to be expected in my opinion.  I only wish we could adjust the frequency accordingly to get the rig up to the 4.86 TH/s [If the hash rate is below that] without voiding the warranty.  If it was more than 5% less than stated hash rate, I would be concerned.

As for the SP50, yes, it is a monster with an insane efficiency.  However, I can't imagine trying to get rid of the SP50 once I'm done with it.  It would be hard to find buyers willing to pay for it used at more than $15,000 +.  Not many buyers available in that price range.  The SP50 would have to be broken down and sold piece by piece (blade by blade and PSU's separately).  Maybe someone will have conversion kits available by then with a closure, controller(s), etc... to install one or more blades inside with a controller and fans.  I honestly don't see myself spending $40,000 + on a single rig (SP50) anytime soon with the block halving approaching in July next year.  I'm content staying right here with BITMAIN and smaller rigs that are a bit easier to let go of on eBay when I'm done with them.

If someone buys an SP50 in a group buy or whatever, they will be stuck with it for the long hall in my opinion.  I don't think I'm willing to take that gamble at this point in time.  I might if I had $250,000 to drop down on several of them and move to Washington State to make ROI come about much faster.  However, I don't have $250,000 to drop on that kind of investment right now.  The best I can do right now was purchasing nine (9) S7's and 14 more in December.  The rest of my money I receive in December will be used to open a couple of E-Cig stores.  Hopefully, 4 or 5 months after that I can open two more E-Cig stores.  I hope to have ten (10) stores minimum within a 2 year period.  It would be nice to have 12 to 14 stores open.  Then, if mining is still viable by January, 2018, I may get involved with mining quite heavily.

My apologies for the "short story."  I mainly wanted to say "Thanks" to BITMAIN for their patience and putting up with some of us.  Their contribution to the bitcoin mining community is much appreciated!!!  I still see their S7 as a "beast" and I believe it will be around for quite some time to come.  It can be under clocked for better efficiency in the future.  How much better?  I'm looking forward to finding out.  I know J4bberwock is working on a setup with two DPS-2000 BB server PSU's and breakout board that will also allow one to regulate the amount of voltage supplied to the rigs for better efficiency.  

Tech specifications:

4 layers of copper, 2oz on each layer
4000w output with 2x DPS-2000 BB.
30x PCI-E connectors
On/off switch
Optional adjustable output voltage from 12v to 13.7v on the older DPS-2000 BB PSUs

"Final design should be able to do from 11.2v to 13.0v to cover all the voltages supported by the BM1385 chips (0.60v to 0.71v) if you open the PSU and trim one potentiometer that is easy to access.
Without opening the PSU, the lowest voltage will be 0.6v below the original voltage of your PSU, and max voltage will be 1.2v over the original voltage."

Optional voltmeter if you want to adjust the output.

Sideplates with M3 threads (nutserts or similar) to attach both PSUs together and make the 120mm fans installation easier: 2 screws to remove from the PSUs, attach the plate, screw the fans, "et voila".

Expected price: $55.
Maximum size of first batch will be 150 boards.

https://bitcointalksearch.org/topic/gauging-interest-in-a-s5-3xs7-specific-power-supply-breakout-board-1178099  Might have to get a few... we'll see.

Cheers,

David

...

Seriously.  This may be true!

I would hope that when we are talking about an order for 4 units, they would pay attention, however they have the payment already, so what does it really matter to them.  They obviously shipped to high profile members and partners first, regardless of order size, I expected them to ship on day one, as in the past and arrive immediately.  Also, with these delays, some apparent ~%5 hashrate discrepancies, and the de-listing of S7 units for sale, purchasing several SP50 units instead of farming lots of S7's after this initial test set looks more and more viable IF (sigh) the units become available...

Hello Friend what is the current shipping date going on by order date thanks

i order S7=psu and pay by btc on 10 sep thanks

i received psu in 48 hours in pakistan
 

But i am very happy with my S7 Working all as bitmain promised.

After 25 hours. Just one board a bit warmer. Running stable. 4.8 Th/s


Power consumsion stil low for my gold power supply's

Thank you, those cables look nifty, i will try to get a few. Basically it would be pretty nice for chaining S5's for now, just need to get more boards and then later on i would already have them handy for S7s.

I don't think the power supply's are sold out. Becouse the U3 is to at the moment. Bit odd. So in my eyes they are having some truble with shipping all the S7's

I think everyone should take this as a learning experience...

Do NOT put rigs with PSU's in the same order.  Make separate orders for rigs and PSU's to avoid confusion in the future.  I can see how this could happen.

My Bitmain account has shown "Shipped" in the status since my power supplies shipped on the 2nd.  I have sent several emails, all have been returned with boilerplate responses.  "Miners will ship in order" and:

"Hi,
S7 has been sold out now. but it will be available soon.
Suggest you consider prepare bitcoins during this time and place order once it's available again.

Best Regards

BITMAIN"

AND:

"Hi,
We're shipping out miners following order of full payment.
Once miners are ready, we'll ship them out.
Please wait for update patiently.

Best Regards

BITMAIN"

I think they are seeing my order as "shipped" because of the power supplies and have not fulfilled it, and even after four emails with replies like the above I can't get a personalized response.

here is the seller and he has them in stock

J4bberwock

https://bitcointalksearch.org/topic/m.12530196

Ok, but you can use EVGA 1300 with an addition of two PCI-E extenders on single branch cables. Cost for used evga is ~$125-130 on ebay, maybe slightly less here if you can find it.

Looks like they are all sold out of the APW3-12-1600-B2 PSUs as well.