Topic: [ANN] Sfards:SF100, the first 28nm Dual-Mode Miner is accepting pre-order now - page 69. (Read 129811 times)

+1  Power consumption actually appears to be about 20% lower on-chip that the BM1384.

yeah thats where the rubber meats the road.

Sounds great but at what cost $ per gh would you be willing to spend on this?  That will come later of course but an estimated goal would be nice to know.

Dogie, I think it's high time you'll put a disclaimer about your BitmainTech affiliation somewhere in your signature or personal text.

Agreed, looks extremely similar power consumption to the S5's chip on sha256 mode. The scrypt mode looks more appealing, and we don't yet know what we'll be able to do in dual mining modes. If its anything like the gen 1 chips then I don't think many people will dual mine.

Very exciting! Can't wait to see test results from the public and prices.

well we know many builders are overly optimistic, but they specifically state they did a work around allowing for lower good clockings on the chip.

If so it should be lower then any other chip available.  

they say .45 volts will allow for a stable minimum.  right now sidehack is working on the bitmain chip and is getting a stable .65 or .675 volts .

 So  if this chip can do a stable .5 volts on the low end  we could be at  .3 watts a kh at the wall for btc  nice ,but  I can do .45 underclocked with an avalon 4.1 or a sp20e.

Would be really nice if .225 watts could work on the low end.

Congratulations.
Nice to see another BGA ASIC.

Guy

Looking forward to details on availability and power consumption at the wall!

Soldering BGA isn't so bad - depends entirely on the pitch.  Inspection sucks, though - better to get it right the first time.  The reduced rows means you could use some additional glue dots for stability when soldering outside of a more professional setup.  With reference designs posted, you don't even have to worry much about fanning it out yourself, just copy/paste

BGA  
This particular choice will greatly reduce the number of homemade/independent boards for this chip.
The center grid is probably GND, if the other ones have been placed in a smart way (areas instead of individual pins), it's still doable for most of the guys who are already soldering qfn or similar packages.

0.19J/GH is like 190 watts for 1 TH/s?

Edit : thanks for the explanation (previous post) klondike_bar.

it wont be. guarenteed thats at the lowest voltage/frequency, and probably for just the chip (doesnt include regulator loss, PSU loss, other power draws like a controller/fan)

realisticlaly in a final product, this would probably range 0.28W-0.50W depending on settings (ie: similar to the Bitmain chip)

If it's true it will definitely change some things. That's a really nice ratio.

If the j/gh ratio is real, this is gonna be a game changer! 

Excellent!

those are pretty good

Do you have an efficiency vs hash rate graph you can share?

Update 14/4/15:

Thank you all for waiting so patiently, today we'd like to announce some long awaited specifications for the SF3301!



The SF3301 fully utilizes the advantages of the FD-SOI technology. With increased forward body bias the chip is operational at lower voltages while maintaining a higher frequency. The chip boasts impressive power efficiency while affording high hash power, allowing for much lower wastage per hash. The ASIC’s lowest working voltage is 0.45V, with lowest BTC efficiency at 0.19J/GH, and lowest LTC efficiency at 1.75J/MH. In current market conditions compared to other mining technology, dual-algorithm capabilities can provide a clear advantage.

After strenuous testing of the SF3301, we reached hashrates of 152GH/s for SHA-256 and 3.17MH/s for Scrypt.

This month we will also be releasing a number of documents for the SF3301 as open source including the ASIC Development Board designs.

Next month we will release some design specifications for our debut miner.

Additionally in the near future SFARDS will be selling ASIC development boards and sample chips, making the SF3301 accessible to developers who wish to customize and build their own hardware. SFARDS welcomes any and all developers and communities to build upon our technology and contribute to the mining ecosystem.

Please contact [email protected] for more information.

Thank you for your replies. We are sorry for the mistakes on our website, SFARDS was founded late in Aug. 2014 and our engineers were focused on developing our ASICs and our miner, they only spent a little bit of time on designing a basic website , so there must be some careless errors on it.

To be honest, our intentions were simply to get sfards.com online, not to mislead. Thank you for your opinions, we are in the process of replacing the photos on our website.

http://sfards.com/