Topic: Black Arrow 28nm 100Ghash Bitcoin ASIC from $0.49/GH/s - page 342. (Read 787066 times)

My email has been swamped... as well as tickets. Good chance it got lost.
I will be offering as much of a refund policy as possible, If the order has not been sent off to BA yet, I offer 100% refunds. As far as late shipments, that is something that I will have to think about as we get closer to release date.

hi matt

Any news on a UK reseller please?

I made the mistake of not being around yesterday and now I'm digging out. I'll try to answer as much as I can. If I miss your question, please let me know.

1). I'll pass the technical questions regarding our data sheet to our engineers.
2). Paypal is out because they could close our account at any time. If that were to happen assets would be frozen which would have a profound impact on our development. At this time it's not a possibility to pay via paypal. We'll revisit the idea down the road.

3). regarding Black Arrow's support system, we're swamped. We're processing payment information first since it's important to get the totals out to you as quickly as possible. After that we're working on questions. Unfortunately, a lot of the questions have been answered before. If your question has not been answered within a 2-3 day period, please message me your ticket number. I'm really sorry that it's taking some time before your questions are answered.

4). The Prospero X-1 will have a different heatsync but it'll be just as effective.

5). Tigerfree, are you the original owner? Did you get our email? Reply via personal message please so we can get this sorted out.

I cant answer on the refunds for them, but as for USB>BTC, I use:
https://bitcoinaverage.com/#USD

And them, as well as I have since then given up on paypal. They closed my account without notice, and last I heard same thing for BA

Well, they do need quite some lines I think... Rough estimation is that @0.85V and 0.5W/Ghs they would need to have ~59 amps (100ghs*.5W / 0.85V) per chip (not including losses and such and assuming 1 chip per 100ghs device).


Yes, heat is going to be substantial, but 50W is not too crazy for a chip with a large heatsink. Pictures of testing heatsinks have been posted as Carlton is mentioning.

The designs for the heatsink appear well advanced, they have samples in what looks like aluminum and copper from last week. I think they still haven't decided on whether to house all the chips in a single 19 inch Prospero-3 (with two rows of boards and heatsinks) or to split this into 2 units with one row in each. I would assume the Prospero 1 heatsink will be identical to that of the Prospero 3, so you will be getting a little Jalapeno/Little Single style unit (due to the size of the heatsink). 

paypal wont allow payment's that cannot be delivered before 30 days, so I guess no Paypal yet.

PayPal refund window is 45 days for you to file a claim + 20 days for the seller to resolver the dispute.

Not yet. They do need to tape out asap if they want to hit a Feb date.

Does anyone know if these guys have actually taped out? I find it extremely hard to believe that they will deliver anything in February if they have not taped out yet...

After taking a quick look at the specs - I have some questions (and recommendations) for the development team:

Do you HAVE TO use a FCBGA and 700 pins? That's quite a pain for troubleshooting and not to mention much more expensive for in the manufacturing process.

If it isn't too late - could you consider a QFN (or[T]QFP or something else non-BGA)?
There are probably way too many duplicate and unnecessary pins - probably with some optimization it will be possible to pick another packaging?
For example - there are 40 pins that provide IOVDD and IOVSS - do you really have to have 40 pins for that? Do they have to deal with that high currents?
Also - blinky stuff and LEDs don't have to have dedicated pins - the host microcontroller can easily deal with the blinking (if at all necessary).
Unless the temperature detector absolutely must have its own separate GNS - why not share IOVSS for example?
etc

And the other question - heat - what are the plans to deal with that?
Is the silicon going to be exposed (BFL-like) where users can attach a proper heatsink? Or is heat going to be dissipated through the PCB? If the second then bitfury-like packaging with a huge pad underneath the chip (and tons of vias on the pcb) will be better than a bunch of balls/pins.

And my apologies if some of that has already been answered.

ii have old FPGA from you how much i will get for them if i return them to you ?

Bank transfer,Weston Union, BTC.

what forms of payment do they accept?

Is customer support alive? I send 3 tickets for the orders I've placed two days ago. But never get an answer. When can I expect somebody will take a look?

Good to see the preliminary datasheets. Does anybody know how close this might make them to tape-out? TIA

Excellent release. Good to see progress. Decent package size (25x25mm). Do you have an estimated die size? 1 die per package?

hi, Link does not work and please can you give me an update please on a Uk reseller, thanks

Steve

We have released the Preliminary datasheet of the Minion ASIC