[ANN] Bitfury is looking for alpha-testers of first chips! FREE MONEY HERE!

[needbmw]

What are you using for spiclk speeds and bitfury clock setting?

SPI clock 500 kHz, core voltage 0.88V, internal slow osc 54 bits.

[LaserHorse]

I've got it running 9.5GH on seven chips; was running 8.5GH on four.  Pretty disappointing

Weird - I've got a 9-chip chain that's maxing out @ 9.5GH as well.  Just did a rework of my DC converter because of this and have tried all the clock settings posted here.

This is why I assumed you were using an external clock when you were running 4 @ 9GH.

[giorgiomassa]

Is anybody else getting those crazy spikes out of c-scape's 16 bitfury card power supply? Guess this is why my chain is highly unstable, the length is detected randomly and sometimes even not detected at all...



Any help appreciated!

Thanks

[cscape]

@giorgiomassa: did you check the input voltage ? Is it stable ?

[giorgiomassa]

@giorgiomassa: did you check the input voltage ? Is it stable ?

Yeah, 12.000V stable and no ripples, it's very strange, maybe some parts of the TPS are damaged/broken?

[Dexter770221]

@giorgiomassa: did you check the input voltage ? Is it stable ?

Yeah, 12.000V stable and no ripples, it's very strange, maybe some parts of the TPS are damaged/broken?

Or wrong value. Most likely in compensation loop.

[cscape]

Or wrong value. Most likely in compensation loop.

Or in the (over)current sense resistors. I assume the resistors are all unmarked ?

[giorgiomassa]

Or wrong value. Most likely in compensation loop.

Or in the (over)current sense resistors. I assume the resistors are all unmarked ?

Yeah but let me double check them one by one, thanks for the hint, I will let you know 

[cscape]

The 5 parallel resistors on the back are (counting from corner): 220k, 147k, 187k, 220k, 100k. Did they put silk screen on the back ?

[ssi]

What are you using for spiclk speeds and bitfury clock setting?

SPI clock 500 kHz, core voltage 0.88V, internal slow osc 54 bits.

What software are you using?

[ssi]

Pretty sure it's a software problem.

Switched from cgminer to chainminer, and now I'm seeing >18GH on seven chips!

[vulgartrendkill]

Our (c-scape & intron) bi•fury board is hashing over 5 GH/sec.

Screenshot from BTC Guild:


Photo of bi•fury prototype board with 2 ASICs, plugged into laptop. A fan is aimed at the board + heatsink, keeping the ASIC temperature at 45 ℃, and the rest of the board (including the regulator) at 40 ℃. Core voltage has been set at 0.84V. 

The extra pushbuttons, jumper, and 3 wire UART are just for testing/debugging.

Holy thats pretty impressive   Any news on full production/cost?

[vulgartrendkill]

Man, I'd be all over this, but I have the EE skills of a carrot

+1

[cscape]

Holy thats pretty impressive   Any news on full production/cost?

Like with the S-HASH design, we're not looking to mass produce this ourselves, but we're open for licensing agreements with 3rd parties to build them. It's hard to estimate a cost. It all depends on volume and what kind of deal you can make with the bitfury ASIC sellers.

[vulgartrendkill]

Holy thats pretty impressive   Any news on full production/cost?

Like with the S-HASH design, we're not looking to mass produce this ourselves, but we're open for licensing agreements with 3rd parties to build them. It's hard to estimate a cost. It all depends on volume and what kind of deal you can make with the bitfury ASIC sellers.

Have you approached any companies yet?  This looks pretty special to me

Fantastic work on those boards by the way.

[Bitcoinorama]

Holy thats pretty impressive   Any news on full production/cost?

Like with the S-HASH design, we're not looking to mass produce this ourselves, but we're open for licensing agreements with 3rd parties to build them. It's hard to estimate a cost. It all depends on volume and what kind of deal you can make with the bitfury ASIC sellers.

Have you approached any companies yet?  This looks pretty special to me

Fantastic work on those boards by the way.

Indeed.

[ssi]

I think I have a bad chip.  It was acting strangely when I was testing cgminer hashing one chip at a time, reporting between 500 and 1500MH where all others were >2.5GH.

Now that I'm on chainminer, I just repopulated that chip on the board, and this seems to confirm it's marginal:


1       AIfDSo  54      2.803   2.430   109     75      0       1       128     [0:0]   663     7 7 5 6 7 7 7 8 7 6 7 8 8 6 7 6         0 2 5 2 3 3 1 5 8 5 7 6 7 11 10 0
2       AIfDSo  54      2.906   2.582   113     96      0       0       136     [0:1]   662     6 6 7 7 6 7 7 8 8 7 8 6 8 8 8 6         0 0 1 3 4 4 3 5 9 8 8 10 12 15 14 0
3       AIfDSo  54      2.340   2.620   91      56      0       0       138     [0:2]   675     5 6 6 7 6 6 5 6 3 6 5 7 6 5 6 6         1 0 0 0 3 4 5 4 6 3 4 3 7 8 8 0
4       AIfDSo  54      2.829   2.373   110     27      0       0       125     [0:3]   662     7 7 8 8 7 6 6 6 7 8 5 7 7 7 7 7         0 0 0 1 1 1 2 3 0 0 3 3 4 4 5 0
5       AIfDSo  54      2.726   2.506   106     72      0       0       132     [0:4]   675     6 6 6 7 6 7 7 8 6 8 8 7 6 6 7 5         0 1 4 4 3 4 1 4 8 5 7 6 7 9 9 0
6       AIfDSo  54      2.083   2.449   81      46      0       0       129     [0:5]   684     5 5 5 5 5 4 5 5 5 6 6 6 4 5 5 5         0 0 0 0 0 1 1 3 3 3 5 9 7 7 7 0
7       AIfDSo  54      2.495   2.430   97      120     0       0       128     [0:6]   669     5 6 6 6 7 6 7 5 7 7 6 6 6 7 6 4         1 2 2 3 1 5 5 9 10 14 14 11 13 15 14 1
8       AIfDSo  54      0.617   2.430   24      156     0       0       128     [0:7]   735     0 2 1 3 3 2 2 0 1 2 2 0 2 0 2 2         3 1 8 12 12 14 15 18 13 7 7 16 14 9 6 1
speed:432 noncerate[GH/s]:18.800 (2.350/chip) hashrate[GH/s]:19.823 good:731 errors:648 spi-errors:0 miso-errors:1 jobs:145 (record[GH/s]:0.000)
0:      432     18.800  19.823  731     648     0       1


I don't understand what all the stats mean yet, but chip #8 is the one I suspected as bad.

[LaserHorse]

Now that I'm on chainminer, I just repopulated that chip on the board, and this seems to confirm it's marginal:

What is this "chainminer" you speak of 

[vs3]

Now that I'm on chainminer, I just repopulated that chip on the board, and this seems to confirm it's marginal:

What is this "chainminer" you speak of 

It was announced here:

Thanks to Niko and his team for developing a nice web interface for the rPi controller.

https://megabigpower.com/images/piServer.PNG

also he put up the chainminer code on a github:
https://github.com/bfsb/chainminer

I'd love to see some community effort around improving both the piWeb front end, stratum failover options & chainminer itself...

[LaserHorse]

thnx - blinked and I missed it!