[GUIDE] BitFury Miner Support/Tuning

[Cablez]

And how well does that regulator seem to work?

[goxed]

And how well does that regulator seem to work?

very well in fact. No overheating issues until max 1V that I have tested, but the bitfury chips get super hot, since I donot have adequate heatsinking for them.

[cypherdoc]

And how well does that regulator seem to work?

very well in fact. No overheating issues until max 1V that I have tested, but the bitfury chips get super hot, since I donot have adequate heatsinking for them.

why can't you mount the heatsinks on the chips themselves?  are they mounted on the backside?

[goxed]

And how well does that regulator seem to work?

very well in fact. No overheating issues until max 1V that I have tested, but the bitfury chips get super hot, since I donot have adequate heatsinking for them.

why can't you mount the heatsinks on the chips themselves?  are they mounted on the backside?

yes there are heatsinks on the backside as well. I guess I need to source beefier heatsinks to test the board at >0.85V

[Keefe]

And how well does that regulator seem to work?

very well in fact. No overheating issues until max 1V that I have tested, but the bitfury chips get super hot, since I donot have adequate heatsinking for them.

Do you know how many amps you're pulling from that 30A regulator? Don't you want something a little beefier like 40A? And is an output side inductor unnecessary for that regulator?

[goxed]

And how well does that regulator seem to work?

very well in fact. No overheating issues until max 1V that I have tested, but the bitfury chips get super hot, since I donot have adequate heatsinking for them.

Do you know how many amps you're pulling from that 30A regulator? Don't you want something a little beefier like 40A? And is an output side inductor unnecessary for that regulator?

Actually I donot have the testing tools to measure > 10A current. This chip is actually a 2phase regulator with 20A OCP limit per phase. So I am drawing less than 40A for sure. There are 2 0.2uH inductors inside the chip . If bitfury will ever reduce prices of their chips, my plan is to get boards built and quickly solder the chips and couple of decoupling caps thrown in and connect this regulator on the outside. No fuss no muss. 

[Keefe]

And how well does that regulator seem to work?

very well in fact. No overheating issues until max 1V that I have tested, but the bitfury chips get super hot, since I donot have adequate heatsinking for them.

Do you know how many amps you're pulling from that 30A regulator? Don't you want something a little beefier like 40A? And is an output side inductor unnecessary for that regulator?

Actually I donot have the testing tools to measure > 10A current. This chip is actually a 2phase regulator with 20A OCP limit per phase. So I am drawing less than 40A for sure. There are 2 0.2uH inductors inside the chip . If bitfury will ever reduce prices of their chips, my plan is to get boards built and quickly solder the chips and couple of decoupling caps thrown in and connect this regulator on the outside. No fuss no muss.  

Nice! Maybe you could determine the amperage by measuring the resistance of the wire bundle between the reg and card while powered off, and voltage drop while running. Though it might not be possible to isolate it for the resistance measurement without desoldering.

Do those wires get hot? Could you make H-boards with that Intersil reg onboard?

[darkfriend77]

hmmm .. somehow after plugin back one of my old h-boards ... one just stopped getting recoginzed.

I tried to use different slots without success and remarked that having other boards in subsequent slots in the same bank makes them also unrecognized.

I have no idear what happend I can't find any traces of something bad ... does any one can help or has an idear?

https://dl.dropboxusercontent.com/u/43738391/1.JPG

https://dl.dropboxusercontent.com/u/43738391/2.JPG


What can I check? Anyone?

[Keefe]

hmmm .. somehow after plugin back one of my old h-boards ... one just stopped getting recoginzed.

I tried to use different slots without success and remarked that having other boards in subsequent slots in the same bank makes them also unrecognized.

I have no idear what happend I can't find any traces of something bad ... does any one can help or has an idear?

https://dl.dropboxusercontent.com/u/43738391/1.JPG

https://dl.dropboxusercontent.com/u/43738391/2.JPG


What can I check? Anyone?

Is the VRM working? Check voltage at the top of the Pulse inductor. You can use the M-board's ground screw for negative if you don't need an accurate reading.

[goxed]

And how well does that regulator seem to work?

very well in fact. No overheating issues until max 1V that I have tested, but the bitfury chips get super hot, since I donot have adequate heatsinking for them.

Do you know how many amps you're pulling from that 30A regulator? Don't you want something a little beefier like 40A? And is an output side inductor unnecessary for that regulator?

Actually I donot have the testing tools to measure > 10A current. This chip is actually a 2phase regulator with 20A OCP limit per phase. So I am drawing less than 40A for sure. There are 2 0.2uH inductors inside the chip . If bitfury will ever reduce prices of their chips, my plan is to get boards built and quickly solder the chips and couple of decoupling caps thrown in and connect this regulator on the outside. No fuss no muss.  

Nice! Maybe you could determine the amperage by measuring the resistance of the wire bundle between the reg and card while powered off, and voltage drop while running. Though it might not be possible to isolate it for the resistance measurement without desoldering.

Do those wires get hot? Could you make H-boards with that Intersil reg onboard?

I will try that. Right now I am doing stress test with the regulator

 The wires are a bit warm but nowhere near hot .

My PCB dev skills are pretty rusty now, I used Orcad like 10yrs ago for school projects , and haven't designed any more boards after that.


I am trying to re-learn now with Eagle software, and it will take some time for me to design a board with a new regulator. Thats why I wanted to go ahead and get the original design fabbed and plug an external regulator. 

[cypherdoc]

Dave, we need the link the v3 sd card image.

[Gyrsur]

why do my hashrate diversify so much with "autotune off" and "55" for all chips. between 520 and 440.

[Keefe]

why do my hashrate diversify so much with "autotune off" and "55" for all chips. between 520 and 440.

You probably have some H-boards with overloaded VRMs. Check /run/shm/.stat.log every 5 minutes and see if the hashrate of some chips are changing significantly. If so, turn down the speeds on all the chips on that H-board until that H-board's VRM can handle it.

[Gyrsur]

why do my hashrate diversify so much with "autotune off" and "55" for all chips. between 520 and 440.

You probably have some H-boards with overloaded VRMs. Check /run/shm/.stat.log every 5 minutes and see if the hashrate of some chips are changing significantly. If so, turn down the speeds on all the chips on that H-board until that H-board's VRM can handle it.

thank you very much! will try to do so. does this mean the "Voltage Regulator Module" on some boards is not able to supply the power which is needed for the chips to work with this clock settings?

[goxed]

Question to PCB designers:

I submitted a Bitfury h board for fab and got the following message

Code:

1. It appears that your design has 9-12 mil holes, we require a minimum of 15mil drill with drill+10 pads for vias and drill+15 pads for mounting holes.
2. We found over 5 thousand isntances of 5.8-5.9 mil spacing, we require a minimum of 6mil spacing and no less than 6.

Can someone comment if these changes can be easily done in Eagle?

[Keefe]

why do my hashrate diversify so much with "autotune off" and "55" for all chips. between 520 and 440.

You probably have some H-boards with overloaded VRMs. Check /run/shm/.stat.log every 5 minutes and see if the hashrate of some chips are changing significantly. If so, turn down the speeds on all the chips on that H-board until that H-board's VRM can handle it.

thank you very much! will try to do so. does this mean the "Voltage Regulator Module" on some boards is not able to supply the power which is needed for the chips to work with this clock settings?

The V3 rigs were shipped with the H-board trimpots set to a higher voltage than the original design, so when overclocking you'll usually overload the H-boards' VRMs before getting many nonce errors.

[IchibahnSLC]

So the v2.3 m-boards work with the v1.2 h-cards?  I'm just about to design these in PADs.

[ricolein]

Hi,

i havent since days no access to support chat at http://ircnet.eversible.com/. Does anybody knows why?

Ciao

Enrico

[Keefe]

So the v2.3 m-boards work with the v1.2 h-cards?  I'm just about to design these in PADs.

Yes, I believe so.

[Keefe]

Hi,

i havent since days no access to support chat at http://ircnet.eversible.com/. Does anybody knows why?

Ciao

Enrico

Try connecting with an irc client to ircnet.eversible.com and join #bfsbsupport