Topic: ANTMINER S7 is available at bitmaintech.com with 4.86TH/s, 0.25J/GH - page 406. (Read 528055 times)

So would taking orders/payments on 8/30 and shipping 9/21-30 (+10) constitute good business.  I know they always come through but really, just come out and say "preorder".

After my experience with a burning AsicMiner Prisma with ~1100 watts passing through a very small area, I think that I will pass on this miner.  That is just too much power in a tiny area in the event of a fan or cooling failure.

Also, the ROI with my electricity cost with no difficulty increase is ~275 days.  That puts me to mid June.  The halving will be soon after.  It is just a little too close for comfort.

It looks like a nice machine though. Just a bit too pricey for me. 

Wowsers! What a machine. Some really impressive specs but unfortunately far too rich for my blood given import taxes and electricity rates I have to pay.

I really hope Bitmain might make an "S7 mini" with half the specs and that mirrored in pricing as I feel this might be the beginning of the end for home mining as it stands (well it's been on a slippery dip for a while now)

Best of luck to those that buy, kudos to those that can afford it (the upfront cost and cheap electric rates) and thanks Bitmain for pushing the envelope!

no, 200-205V minimal

I have a 220 outlet in the basement but not the garage.

maybe, but two of evga cords are split already. i am not suggesting to split those again.
However, there are 4 'singles', and if they can handle 266W (in total, so 133w/split), then using splitters on those singles may be the way out of ordering bitmain PSU.
Are they decent or screaming banshies as well?
Most people have plenty of PSUs already.

BTW, prices are rising in aftermarket on spond pieces as a result of S7 pricing.

I believe 205v and up defintally not 110. The 110/120 market is where some of the people doing server PSU kits are going to profit.

If you own the place I suggest looking into 220/240.  If you are renting I know it's out of option.   But I love my 240 after finally doing it.

Can you run the bitmain psu on 110v outlet?

Extender/splitters is not the way to look.   266 is getting up there.   I really think part of this is it makes a decent amount of people order Bitmain PSU.  So they get some add-on sales there.

Also others that sell server PSU's are likely to profit from this move to have 10 PCIe slots.

Can one red cord in EVGA 1300 handle ~266W?
If yes, then with extenders/splitters, i would think that EVGA 1300 might do.
If not...

 Only for the ones that extend past the halfing date - mid-July is appx. 290 days out.

 On the other hand, this chart doesn't take diff increases into account at all, which is why I prefer to use a site like bitcoinwisdom.

 Took the time to look closely at the pics available of the S7. It appears the connectors are all on a common power bus, therefore you should be able to get away with running each board on 2 connectors, at around 180 watts per connector (15 amps) at stock settings. LOTS more headroom on the connectors vs. running an S5 on a single connector per hash board.




 I was guessing 2.3+ TH at just under 4BTC. Actual machine is a little more than double the TH for a hair under double the BTC. If they'd gone 2 board vs. 3 and 2 strings per board vs. 3 looks like my estimate would have been pretty close, abet a little on the high side, for price.




You'd have to do the calculation in 2 parts, one part pre-halfing one post - and take a guess at when it will occur (mid-July looks pretty likely at the moment).



 IIRC the IRS regulations treat Bitcoin more as a security, not a manufactured item, but I've NOT gone through those regs with a fine-tooth comb yet.
 MINING bitcoin can definitely be a business, but that's been obvious for a while now.
 Same limits on "hobby" vs. "business" should apply as for any other business - if you expect to make a net profit (in 5 years IIRC) or support yourself on it,
 you can call it a business.



 I suspect any LESSER fan won't keep the unit cool, unless you have a VERY cold room to put it in. Delta fans, especially the "directed flow" models as used on the S5, S5+, and S7, are very well known for being able to flow massive amounts of air despite significant back pressure - and the S7 like the S5+ WILL have significant back pressure due to the congestion caused by the heatsinks.

 Not saying non-Delta fans can't work, there are a few other folks make similar capability fans, but I'd bet there is NO 25mm fan design that can flow enough air through an S7 to keep it cool at it's specified operating temp range, and very few 38mm ones.



 Bitmain specified that there would be coupons offered to late adopters of the S5, INCLUDING the used units, and the S5+, for purchace of the "next generation product".



 But the fine print in the S7 page specifies to not drop the voltage below 12V.

 It doesn't look like the S7 is designed to undervolt at all. 8-(
 
 UnderCLOCK on the other hand, I'd suspect they can do.

 


 I'm not sure, but I suspect A1 based gear is still profitable if you have 5 cent electric. Perhaps a little higher. Given how many Dragons were sold by Lketc, that's probably a pretty big chunk of hashpower.

It's honestly hard to say.  LKetc/Innosilicon are doing A3 and A4 chips at once ... I think they should have focused and did one then the other.  I would not count them as a big factor right now.

Now Bitmain and how many S7's they do make will raise difficulty.  Someday I still think a lot of A1 gear needs to come offline.  I'm not sure how much this equals, but I think there are basic data centers full still in very cheap electricity places.

You could do one on individual electric prices, and make a spreadsheet over time, mine is more of a quick and easy guide I'm afraid.

Diff rises have been fairly gentle for a while, but with this new equipment hitting the market for buyers, the innevitable Bitmain S7 self mine, the Hashnest S7 mine, the Pacmic V4 S7 Mine (and possibly LKTec/Innosilicon machines soon) I think the diff is going to get some sizeable jumps in the near future. My best guess would be to add even more say 50% onto the ROI dates, that should cover diff rises and the halving.

I was guessing around $1300 and @6th.  Seems lack of competition allows Bitmain free reign.  But at least they release new product continually albeit the interum one, two punch in the face like the S5+.  Tempting but the the Btc earned daily stays almost constant with each release.  No big leap in progress but the efficiency.  Good job anyway Bitmain on the progress.

Thx Tigggger.  Very helpful.

 I guess there's no way to include the halving in your calculation. So we need to be aware the BE time (aka ROI) is likely longer for each of the electrical rates in your chart. As a very rough estimate, my guess is we can add 25% to the length of time to ROI.

Thanks for the chart tigggger,

Very useful.  My big thing I have is finding proper space for my units.  I'm looking a co-hosting locations now.  The thing is that means I'll be paying commercial rates, probably around 9 cents per kW/h, where I live and assuming the hosting company doesn't try to put a premium on that to F you.  However, as the IRS regulations have came out in the US, it's my belief that mining any cryptocurrency would then qualify as a manufacturing trade or business, since you're creating an asset.  As such a light industrial space would be able to command even lower electricity rates.  In some places in the US that's as low as 5.5 cents per kW/h.  Course finding that space without having to rent a 8,500 Sq Ft warehouse is the PITA where I'm at.

Yeah but I/we somehow manage the mod s5 fans and they are not as loud. The design on this miner seems to be tight. 3 boards are close, so I am not sure if any other fan would do the job. Rich suggested that we could split 2 into 3 miners, each miner having 2 boards, just like s5 (assuming the s5 controller would work with them). But until this is clear, its just a gamble for me as Im literally living with my miners.

It use the same fan as the S5, so 2 jet engine fans

So many things I dislike about this miner.

1- I can't afford to buy any.  
2- Using 3 PCI-e's per card is uneven wear on a regular, mass produced PSU's.
3- Quality 1,300-1,400 Watt PSU's are very expensive and wire count could be an issue.
4- Takes a whole breaker on its own; can't put thing else on other than USB miners.
5- It goes down, you're down in a big way.
6- Like louder than a jet taking off.

What I like though is the metallic shroud and the two fans like the S3... neat, solid set up.

Although I see the logic, larger miners, less small $ sales, less overhead but it's not very good for vanilla home mining.
I think half of that half that would be fine or use blades with 4 power ports instead of 3.
Noise won't bother me but will bother many home miners.
Not sure if I will buy this at all, I could nearly double my daily take tho... but at BTC8.0 I will pay off some old bills or buy some nice things instead.

Although, knowing myself, I will likely buy a few, I prefer the 1U miners over anything.