GMO miner B2: 7NM mining within reach?

[cuteman]

is this already out in the market? if so any reviews on the performance? this might crush the bitmains dominance over the bitcoin network hashrate and people will finally stop crying about china controlling bitcoin/bcash lol looking forward to this technology

No. At the moment, we will have to wait until at least October - 5 months, before anyone will see a unit.

[minefarmbuy]

Where is the October verbiage? GMO's site says July batch but their taking "applications" for orders.

[minefarmbuy]

Broker just shared this even though it is a generic reply our first 100 batch order is in.

Thank you for your interest in GMO miner.
------------------------------------------------------------
Since the mass production system of GMO miner B2 is in place, we are now able to provide GMO miner B2,
 to every customer after the payment is confirmed. For the delivery date please check your invoice.
------------------------------------------------------------

Within the next business day, we will send you the Terms and Conditions,
invoice and bank wire instructions regarding your order.
Please bear in mind that your application will be deemed completed only
after the wire transfer is verified on our end.

Please note that those who process the payment within the due date will be eligible for the order.

Should you have any questions or concerns, please do not hesitate to
contact the GMO miner Team. We appreciate your patience and business.

Thank you.

Sincerely Yours,
GMO miner Support Team
support@gmominer.z.com

[mgoz]

Where is the October verbiage? GMO's site says July batch but their taking "applications" for orders.

It was in all of their press releases, presentation, and also still currently on their pricing page, although that now says shipping November 2018. FAQ still says end of October for June orders.

[minefarmbuy]

Sad we missed that, broker got the invoice a moment ago. We'll have to contact buyers and soak transaction fees for those who don't want to wait or position funds for another buy.

Thank you.

[Holiidayz]

Broker just shared this even though it is a generic reply our first 100 batch order is in.

[...]

Did you pay using the email they provided to you after you completed the purchase application? or was it done on their website?

[minefarmbuy]

Did you pay using the email they provided to you after you completed the purchase application? or was it done on their website?

I just do the marketing for mfb but from what I understand is they send BTC/BCH addresses and wire information. You pay to your preference, no need to contact them directly unless you need to. B2 is sold out though, B3 is available for Nov.

[quixote.moon]

there is a "spec" for it on their site, what states: Daisy Chain   MAX 32 units.. .whatever this means, I am curious if anyone has some actual info on this!

go to B2 press release where some features are explained more completely.

Only requires plugging one of them into the internet, and the rest hook up to eachother

[rifleman74]

go to B2 press release where some features are explained more completely.

Only requires plugging one of them into the internet, and the rest hook up to eachother

Just like the Avalons....saves on running multiple ethernet wire all over the place, although the Avalon's start to get some weird errors after five are connected.   Still five is better than one.

[philipma1957]

my post on avalons hooking up to the rasp pi controller was deleted.

There was a point to it.  So I will re phrase

max avalons on a controller = 20

I have found 12 on a controller work far better then 20.

so 60%  of max = really good results.

100% of max = more errors.

No one knows  what the max will be for this new gear.

I caution buyers that what is said to be the max  by the builder  may work  or you may need to do 60% of the max daisy-chain the builder of this gear says you can do.

So if you are getting a lot of these keep in mind you may not be able to the full amount the builder say that you can do.

Since this is speculation I will speculate that  50 to 65%  of the number said to be the max by the builder  will work better with less errors then 100% of the max the builder says you can do.

[Thetaj]

Does anyone here have anything to add about the double fans?

Will that actually be more efficient than 1 bigger fan?

I'm quite curious since they don't mention that part in any of their FAQ

[NotFuzzyWarm]

Does anyone here have anything to add about the double fans?

Just that they are not stacked fans. Each is a single fan like the Delta GFB1212VHW that uses a 76.2mm deep housing to accommodate deeper fan blades.

edit: added DigiKey link to the Delta fan

[sidehack]

I wondered about that.

I also wondered - why make a machine for which that's necessary?

[minefarmbuy]

Ok, so my original thought was correct about the b3 fans?

Aren't these rated at higher wattage than 2k? You'll at least have voltage "control" in the UI to bring it down to b2 spec. Still "vaporware" till we're closer to release date. Way to early GMO, you've already changed your design in a few months. Maybe soon they'll figure out a third model that has the speed with efficiencies we want to see by Oct.

@sidehack: I imagine your question is rhetorical but for the sake of discourse.  ..

Retooling can be costly so I imagine design is centered to manufacturing, look at Obilisk for example. It will be hard to break the narrow tube design, packing heat sinks in a jar like they're cotton balls. Maybe someone will be bold and change the game for the industry.

[sidehack]

You mean like literally everyone was doing before the S7 became popular? And like Canaan still does?

The narrow tube design with heat sinks packed in like cotton balls is a lazy way to put way too much power in a tiny box. A tiny box nobody's asking for. A tiny box that substantially reduces system reliability (not just by baking the crap out of your silicon, but by relying heavily on overtaxed mechanical components like high-speed fans and assumptions about ambient conditions - these would die rapidly without chilled, dust-free air), in a time when breakeven returns will take a year longer than the warranty period.

It doesn't really take boldness. Just takes common sense, a little bit of extra R&D and prioritizing providing durable quality hardware to the customer over making immediate large profits.

[minefarmbuy]

Profits are a huge motivator, that's why it would be a bold move to break the norm and why other people conform to meet the expectation. In a sense at this point to deliver anything else to market would be "rebellious" even as we agree completely, that it would only make sense to do so to deliver a quality product.

[philipma1957]

Profits are a huge motivator, that's why it would be a bold move to break the norm and why other people conform to meet the expectation. In a sense at this point to deliver anything else to market would be "rebellious" even as we agree completely, that it would only make sense to do so to deliver a quality product.

They are  not taking advantage  of other designers.

use avalon 841 heatssinks
use halong t1 style firmware for speed control

82 watts  per th

   fast speed       15 th  1230 watts
  medium speed  13 th  1066 watts
  slow speed       12 th    984  watts

easy peasy

[minefarmbuy]

Only advantage is in the way of using manufacturing already in place. If you mimic you can turn units quickly since you don't have to retool a factory especially if you own your own facility (turn time is even more accelerated).

Canaan is a great example of design intuitiveness. Still though the concept is the same, just more thought into delivering a better product (my personal opinion) with subtle but effective changes. As a buyer you're rewarded with it. If you're following my post on heat here lately I am less nervous about my avalons then my antminers. Would love a T1 but with prices probably looking at other units.

Back to the b2/3 concept, if you're facilities cooling is on point it doesn't matter. Stuff the jar, suck the power (if it's cheap), mine blocks. These things aren't made for me and mining at home.

Then any miner wants a solid combination of hash and efficiencies. My point is that GMO is taking this model to the extreme. I hope companies pick up on this and look to adjust in a better direction like we're all saying in different ways. Better efficiencies, cooling design, and voltage control.

I don't need a miner that looks like Arnold would have over his shoulder ready to fire from a helicopter.

[NotFuzzyWarm]

Only advantage is in the way of using manufacturing already in place. If you mimic you can turn units quickly since you don't have to retool a factory especially if you own your own facility (turn time is even more accelerated).
<snip>

In-place mfg such as what?

PCB assembly houses do not care about the shape of boards, they can make and stuff any shape/size you want.
As for the housing, Bitmain uses an extruded tube and ja an extrusion die cost $$$ to make however there are many extruded tube/case profiles that could be used 'off-the-shelf'. Canaan and GMO are using machined frames and simple bent covers which of course means that they could use any style case they want to.

[minefarmbuy]

I appreciate the insight but the argument isn't they can't, but why they don't. Ease, profits, turn to market. Or is there more I'm missing?