[ANN] Bitfury ASIC sales in EU and Europe

[tom99]

For a more durable way to overvoltage the boards you should replace resistor R01F. The nominal value is 1.0K, and to increase the voltage the resistor needs to be replaced with one of a higher value.

A value of 1.5K is generally still safe, and should increase voltage from 0.65 to 0.7. If you want to go higher, you can try 2.2K or maybe even 3.3K if you feel lucky.

Of course, as punin said, this will void your warranty, and may break your card. Keep a close eye on the regulator temperature. Also, the resistor is in a somewhat tricky position to desolder, and you risk getting tin on the pins of the regulator.

The resistor should be 0603 size to fit properly on the pad. Also, I recommend a 1% type with low temperature coefficient. Resistors with high positive temperature coefficient may cause thermal runaway: as the resistor heats up, the voltage increases, causing the resistor to heat up even more.



Note: if you accidentally mess up the capacitor next to the resistor (C10F), and you wish to replace it, use 1nF, 50V, X7R type. Similarly, resistor R02F is 10k, 1%.

   Dont you think better to change resistor R01F to Variable Resistor and we can player with it.

[-Redacted-]

Both are working on eligius, 60gh @diff 128, 45gh @diff 64. I tried 256, but it fell down to 30gh for 2hours tonight.

diff 128 too much for 60gh i think ... 8-16 is nice.

I saw a statement (by ckolivas) that the diff you use should be roughly the nearest power of 2 to ( speed in Gh/s / 1,6 ).  For 60 Gh/s, that divides out to 37,5 - so the diff you should be using would be about 32 (or 16 if you want to go one less.)

[klondike_bar]

BitFury and punin did a great job. They are heroes in the bitcoin community.

The bet is long over. Just confirming that a UNIT is whatever fits on a single M-board connected to a Raspberry-Pi.

And of course I have integrity. If I didn't, I would have created a second account to ask the question.  I have nothing to hide.

your account has 16 posts, most of which focus on arguing/asking what consitutes a bitfury 'UNIT', which directly relates to a bitbet you lost.
(the bet was that bitfury would deliver on their promise to deliver units at 400Ghash and under 400w, by the end of august - They did, albeit adding a little extra hardware to compensate a rushed manufacturing process that wont occur again

[eleuthria]

Both are working on eligius, 60gh @diff 128, 45gh @diff 64. I tried 256, but it fell down to 30gh for 2hours tonight.

diff 128 too much for 60gh i think ... 8-16 is nice.

I saw a statement (by ckolivas) that the diff you use should be roughly the nearest power of 2 to ( speed in Gh/s / 1,6 ).  For 60 Gh/s, that divides out to 37,5 - so the diff you should be using would be about 32 (or 16 if you want to go one less.)

That's BTC Guild's recommendation, and it works out very well.  There's a more precise calculation for pools that offer more difficulty precision, but most of them use powers of 2.  The "nearest power of 2" method will put you right in the range that variable difficulty for most pools would adjust you to.  Generally rounding down is preferred unless you're just shy of the next tier.

[cscape]

Dont you think better to change resistor R01F to Variable Resistor and we can player with it.

The resistor is in a regulation feedback path, so we don't want long wires that can influence stability of the control loop. Also, potentiometers are notoriously sensitive to wear and dirt.

[goxed]

Dont you think better to change resistor R01F to Variable Resistor and we can player with it.

The resistor is in a regulation feedback path, so we don't want long wires that can influence stability of the control loop. Also, potentiometers are notoriously sensitive to wear and dirt.

Why do I measure the resistance of R01F and R02F as 1.3KOhm on the h-board, is it in parallel if other elements on Vout?

[-Redacted-]

Measuring in-circuit is always a bit different than measuring the part itself - it's for doing "quick hacks".  Otherwise, you'd need to unsolder the part, measure /change/mod it, then re-solder it back onto the board.  When you measure in-circuit you are also picking up alternative DC paths through everything it connects to.  This doesn't always work so well when the circuit is designed to deal with AC or for parts other than resistors - inductors have much differerent AC characteristics, for example, but would measure at zero ohms...

[cscape]

When you measure them off the board, then R02F = 10k, and R01F = 1.0k or 1.5k.  When you measure them in-circuit, you also measure part of the regulator IC. The resistance will then depend on polarity of your probe, and measuring voltage used by the multimeter.

The 1.1k - 1.3k people are referring to is not an accurate value, but it can be used to judge the effects of the pencil. Also, if you have multiple boards, measuring before/after gives you a reasonable shot at some consistency.

[eneloop]

C) the stat.log is a log thats being rewritten every 5 minutes, the best.log is the best results that autotune has reached. I started off by copying the best.log to /opt/bitfury/best.cnf, which is loaded when the miner starts.

how to copy the file? step by step please.

can anyone give me a description of what .stat.log shows exactly. first 3 colums are clear, 4 and 5 are hasrates (?) and the rest = ?

thanks!

[Isokivi]

C) the stat.log is a log thats being rewritten every 5 minutes, the best.log is the best results that autotune has reached. I started off by copying the best.log to /opt/bitfury/best.cnf, which is loaded when the miner starts.

how to copy the file? step by step please.

can anyone give me a description of what .stat.log shows exactly. first 3 colums are clear, 4 and 5 are hasrates (?) and the rest = ?

thanks!

http://punin.com/README_BFSB_v0.1.txt

Code:

cp /tmp/.best.log /opt/bitfury/best.cnf

[eneloop]

thanks!
tuning best.cnf now.

false nonce and spi/miso err have to be minimized wright?

[Isokivi]

thanks!
tuning best.cnf now.

false nonce and spi/miso err have to be minimized wright?

I just went after the general errors, but I've had very low spi/miso errors all along. Basicly I rose chips that were showing 0 errors and lowered ones that had 10% errors (of valid shares).

[Sitarow]

BitFury and punin did a great job. They are heroes in the bitcoin community.

The bet is long over. Just confirming that a UNIT is whatever fits on a single M-board connected to a Raspberry-Pi.

And of course I have integrity. If I didn't, I would have created a second account to ask the question.  I have nothing to hide.

your account has 16 posts, most of which focus on arguing/asking what constitutes a bitfury 'UNIT', which directly relates to a bitbet you lost.
(the bet was that bitfury would deliver on their promise to deliver units at 400Ghash and under 400w, by the end of august - They did, albeit adding a little extra hardware to compensate a rushed manufacturing process that wont occur again

If they wanted to they could of OC'ed the units and then send us 450+ even with bad manufacturing due to rush order rather then higher quality.

347 Watts @120v


58 Watts @120v


Edit Update

368w @ 120v



60W @ 120V

[rammy2k2]

Both are working on eligius, 60gh @diff 128, 45gh @diff 64. I tried 256, but it fell down to 30gh for 2hours tonight.

diff 128 too much for 60gh i think ... 8-16 is nice.

for 60 GH , 32 diff is recommended

[arorts]

thanks!
tuning best.cnf now.

false nonce and spi/miso err have to be minimized wright?

I just went after the general errors, but I've had very low spi/miso errors all along. Basicly I rose chips that were showing 0 errors and lowered ones that had 10% errors (of valid shares).

Hi, where in the rPI logs do you find valid shares? is that the same as nonces/round?? can I use nonces/round as a proxy for valid shares?

[punin]

So @cscape - where can an average guy go to purchase a 1.5K  0603 resistor in onesie-twosie quantities?  I'm sure we can buy them for 0,01 somewhere but the shipping is going to be 1.000 times more than the part...

Actually your H-board is using 1K5 resistor.

[vs3]

Hi,
Niko
I've send you a few Emails asking about bulk chip order prices.
Is there any problem ?

Sorry Marto, I'm drowning in emails, just had someone take over the communication for me. We will introduce new chip pricing on the site this weekend.

Can't wait!

C'mon guys - the competition is pushing : https://bitmine.ch/?p=882 (and https://bitmine.ch/?page_id=863)

CoinCraft A1 ASIC:
    Configurable in binary tree or daisy chain mode for distributed work with up to 4095 ASICs.
    Standard I2C interface
    Hashing power of 20 GH/s in nominal and 40 GH/s in Turbo mode
    Power usage of 0.35 W/GH in low power, 0.6 W/GH in nominal and 1 W/GH in Turbo mode
    Supply voltage of 0.5V in low power, 0.65 V in nominal and 0.75 V in Turbo mode
---
    Availability: November 2013
    Pricing: $5/GH for the CoinCraft A1 ASIC chips

[eneloop]

what is fastclock for?

how can i disable single chips?

[Anduck]

what is fastclock for?

how can i disable single chips?

Fastclock is something that doesn't exist in the chips, though it was planned to exist.
You can disable single chips by changing AIfDSo to all lowercase in the config (/opt/bitfury/best.cnf)

For example, Chip #1:

Code:

1       AIfDSo  55

to

Code:

1       aifdso  0

[eneloop]

Thanks!
Is there a logfile for each mining startup? I think its much easier to have such a logfile instead of 5 minutes samples to find the best settings.