Topic: A4 Dominator - Pre-Order Group Buy - 280mh, roughly 1000w, $1800 + shipping - page 56. (Read 122571 times)

Doesn't show the units in action. 

Why is it not possible to create a video of the unit(s) running for a couple of minutes with slow camera movements - showing with the case off?  Mining?  With a temperature probe?

I don't get it.

You bet!

Let us make it very clear, at the moment, all units are under tight control from Innosilicon due to lack of ASIC supply so only Innosilicon order enjoys higher delivery priority period. Any promise from non-Innosilicon sources on lower price or shorter lead time should not be trusted. Time is everything.

T-5 days and counting.....

The web page for the A4 Dominator has been updated.
http://www.innosilicon.com/html/mining-asic/14.html


The final form factor is now two separate units (140MH/unit) which use a common PSU.

Interesting that asicminermarket.com is selling a single unit @ 135MH with a longer warranty.
https://asicminermarket.com/product/pre-a4-135-scrypt-litecoin-miner-low-power-batch-1/

Both sellers have exactly the same control software, complete with misspellings.
https://asicminermarket.com/wp-content/uploads/2016/09/a4-Ltc-controlling-software.jpg

If we proceed with the assumption that the new 135MH miners at asicminermarket.com are real and legitimately for sale, couple that with the recent statement that Innosilicon says they are the exclusive WW reseller of the A4 Dominator, then this is most likely a completely new rig made with A4 ASICS by a completely different manufacturer.  That would be supported by the 180 day warranty (versus the A4 Dominator warranty of 45 days)
https://asicminermarket.com/product/pre-a4-135-scrypt-litecoin-miner-low-power-batch-1/

T-6 days until the A4 Dominator ships!!!

How can one tell what is Vaporware and what is not?  I find it interesting that they spend maybe 18 to 22 seconds, recklessly taking a video of something with wires, making a sound and a screen with numbers on it.

Meanwhile, the legitimate products are very slow moving -- showing all the components slowly and are several minutes in length.

Honestly - anyone could put together a video with a pretty box, some fans, create a script that shows some numbers on a screen and then use a phone to video everything really quick.

Or perhaps they broke into Innosilicon and only had a minute to hurry and video the new machine in action?  HMMMM  Perhaps it is a rogue employee that plans to sell these on their own.  LOL  I dunno - but it is entertaining.

So it's 8:32 am October 8th in Shenzhen, the extended holiday is over, so it'll be interesting to see what's next up on deck from Innosilicon.

I snipped this from an email I received earlier in the week from Innosilicon.

"One thing we should claim is that we have no authorized reseller worldwide. We are the exclusive brand of A4 chips as well as our A4 miners.
We can guarantee the quality of our products but not others."

Grabbing my popcorn and looking forward to the new countdown for October 15th!!!!

T-7.......

Well this is very interesting, Asicminermarket has a Youtube channel with 4 VIDEOS of the A4-135 in action posted 5 days ago.

https://www.youtube.com/channel/UCP-E1tvEw2KCGbAOillpLiQ/videos

FYI: They also have videos of many of the other miners they sell.

Their 'About Us' page says they're the China based business of BitcoinWare.net, which is Canada based.

I know nothing about either company, but this doesn't look like Vaporware.

I have had bad experience with Alibaba. Actually the suppliers as Alibaba just connects buyer and sellers. Be very careful. I would not transact there again.

This forum being nice and open gives all the manufacturers access into our thinking. The reverse is not true. I would guarantee there is a pre-pre order. This is a business and manufacturers are out to make money.

I have no evidence but assume the A4's will be delivered. The conditions under which it will be is the difference.

Question still remains - are they a credible reseller and has anyone bought from them previously or is this a honeytrap?

It's just a single unit of the modular design we saw on pgs 23 + 24. Good things are:

• Proof of life - there's a photo of 3 units with their banner sitting atop (doesn't look photo-shopped in)
• Specs in English
• 180 Day Warranty with clear warranty terms
• Free worldwide shipping

The price is fair if you consider that this is retail for a single unit. I would question one thing though. Does this include a Raspberry Pi for each unit and can you get a discount if you daisy chain 3 units per controller?

All the specs line up with what we know to date, i.e. each unit has 2 A4 boards with 20 chips apiece. The advertised Pre-order 280 MHs Dominator miner would be 2 of these units like the A2 Farmboy.

A4-135 Specifications:
1. Hash Rate: 135MH/s ±2%  <-- this is interesting? Inno said they were getting 'better' performance that expected. Really?
2. Power Consumption: 520w
3. Rated Voltage: 11.60 ~13.00V
4  Chip quantity per unit: 40x A4
5  Power connector: 6PIN 12V
6. Dimensions: 285mm(L)*130mm(W)*130mm(H)
7. Cooling: 1 fan
8. Operating Temperature: 0 °C to 40 °C
9. Network Connection: Ethernet
10. Default Frequency: 1200M

Starting to get a clear picture. Pitty we're piecing it together from re-sellers and not Inno themselves.

I have seen pics of spoondles with burned connectors. I have fixed AsicMiner blades that people had shorted the fuses on (oops). I have pried connectors off BFL Monarchs that were pulling <250w per plug. And I have chipped off wreckage from both Neptunes and Titans that were run at 60mh/s (240w).

I have also worked on units that were dusty, dirty, filthy, and buried in manure. I have worked on units that were run in closed rooms in 120 degree aussie heat in the summer down there.

If and when the connectors implode on these things (if they wind up making it to market) I'd be happy to take a look and see what's left.

Some key things to remember:

0) Miner designs suck. Show me ones with UL listing for example, or even proper fusing.
1) It's not watts that determine the ampacity of wire, it's amps.
2) Amps go up as voltage goes down. This is very important when you find your 12v supply is only putting 10v at the miner plug.
3) Voltage drop increases as heat increases
4) Over time connectors get soft. Then one of the six pins starts to get a higher resistance. More current flows through the remaining ones, making things warmer.
5) Begin feedback loop.

Now commercial miners can run plugs with big wires going to 3,000 watt power supplies that will not sag if there is a heavy load on them. Plugs will hold up better. That's nice. But that same 3,000 watt supply will not sag when a cap fails in the miner and it turns the cap into a pretty plasma ball. Or mining chip or via, or whatever. That gets very funny very quickly.

Your mileage may vary. I don't argue with people who know everything, that seems to be pretty common on forums. I prefer objective reality and letting things play out.

Once again I wonder if the signal lines are isolated on these. That's always fun.

So another A4 offering  (1/2 hashing power compared to Dominator) either from another partner buying chips and offering a new rig , or just a honey trap for hapless pre-order buyers.
https://asicminermarket.com/product/pre-a4-135-scrypt-litecoin-miner-low-power-batch-1/#reviews

Has anyone bought anything from these guys in the past i.e. do they have any credibility?

Fast summary: The damage to the plugs is cumulative as well as catastrophic. One of the odd things about the Titans is that they are one of the few miners that have had an operating profit life greater than a few months :-)

I'll do a bigger write-up later, but it's a combo of things that can make the plugs melt. Positive feedback loop.

Thanks Quintleo, following up that lead, the 6Pin Molex 45559-0002 (Male) connector is rated at 8 or 9 amps per circuit depending on vendor, though most say 9A.
http://www.digipart.com/part/45559-0002

Across 3 circuits/pins, that would give 27A or 324W. 8A = 288W.

I'm feeling much happier now. Cheers

 Worked fine pulling 288 Watts / connector (which is the spec for the CONNECTOR) on the Spondoolies SP20 - this will be pulling less than that and is well within the SPECIFIED LIMITS FOR THE CONNECTOR.

 You did NOT hear about issues related to the power connectors on the SP20 - and the internal software had power limiting at the 288 watt per connector level built in BECAUSE that was the connector spec.

 This is NOT pulling 300+ Watts per connector which is where certain KNC designs had issues with FIRES and burnt connections because they were EXCEEDING the connector ratings by a fair bit.



 The "75 watt" spec is a PCI-E SPECIFIC specification, not a CONNECTOR specification.


 With that said, I'm still finding the pricing listed on that site for several of the items to be a major red flag.

Lightfoot, I'm quite concerned as well, but when you look at it, both the S7 and S9 Antminer have roughly the same draw per 6pin PCIe connector.

S7 = 1293W + 10% at the wall and the S9 is 1172W + 12% at the wall using Bitmain's APW3 PSU, possibly more for 80+ > Platinum. Dividing those numbers by 9 (3 cards with 3 connectors), you get about 140-150w per connector or twice the PCIe spec.

Do you have any insights into the failure rates of those miners? Is this something we should really be worried about?

Glad to have you here Lightfoot.  I am suspecting we may need your services after seeing how they did this with 2 6pin PCIE connectors per board and pulling 550w across the 4 plugs/connectors.  Now if we can get Gentarkin to join in on the fun maybe we will be able to keep the A4's alive as long as you guys have managed to keep the Titan's going!  Going to be interesting to see what happens with these new miners.