+1

BF is the most integrated chip design of all SHA-256 hashers. It's like Intel Haswell with included clock, Vreg, and logic. What's missing is auto-overclock and p-states just jk.

btw which MCU are you using? Thanks!

didnt a similar design implemented as an H-board have a problem where if a chip shut off, all other chips became overvolted and shut off or melted?

didnt a similar design implemented as an H-board have a problem where if a chip shut off, all other chips became overvolted and shut off or melted?

The other side of the board has 15 different ground planes. The radiator can short them. Do you use a thermal pad between PCB and a heatsink? Or all ground covered with protective mask?

PS: Well done.

How much?

You're mining on 50BTC.com???

FAKE

Now I'm thinking about passive cooling, as maximum possible power is 0.9x5=4.5w it shouldn't be hard to cool it with larger heat sink - passive cooler. Unfortunately I couldn't find any suitable heatsink in my warehouse. Maybe someone have some larger heatsink, I suppose CPU cooler will be good enough, even without fan switched on. Perhaps for tests it would be enough to firmly put together BiFury's heat sink and larger one. I don't recommend to remove original heat sink from BiFury because it may require thermal paste to get it back correctly - it is too expensive device for such experiments Then try to run it for 15 min monitoring temp. If it goes over 85-90C then test has failed. In any case please let me know results.
I'll try to seek for one too
It would be much more power effective, because as I have found USB fans take about .5A (max USB2.0) so it is ~2.5W more than half of miners consumption. And much silent of course.

hi guys

the ic company have received some samples

there are ongoing tests but here is the first results:

If core voltage is 1.20V, this chip can reach 780MHs

 If core voltage is 1.55V, this chip can reach 1GHs


 1.55V is the maximum voltage.


Others tests are in progress

i ll post all the progress here

thanks

I have got answer from support:
Acceptable temp are high but we advise little usb fan for little cooling and keep them lest than 50 C degree.

But what dose "high" mean?

Did anyone ever get a QFN ZIF-socket and build a chip tester?

That's great!  Can you post what miner you're using and your command line arguments because I've had mine for over a week now and I can't get it hashing to save my liife.

It gets its name from having two Bitfury chips, hence Bi*fury

Voor een hoge, verwachte ROI neemt men een hoog risico. Een hoog risico biedt geen enkele garantie op een ROI.

Een reel van punin met 7.5 TH aan chips binnen twee weken online voor 50k lijkt voor 2014 al terugverdiend. Maakt de difficulty change ook niet meer uit. Mits met voldoende organisatorisch talent, arbeid en beschikbare componenten...

Dan is eigenlijk op dit moment geen een ASIC miner winstgevend, tenzij je hem, zoals jij al zei, nu al in huis hebt.
Dan zal ik toch naar een andere manier moeten gaan zoeken ben ik bang.

People should chill out a bit. I had to wait more than 6 fucking months for my BFL gear to arrive. In this business delays are to be expected.