Topic: [Work in progess] Burnins Avalon Chip to mining board service - page 78. (Read 624200 times)

I think its similar to the video card overclocking, it just adjusts freq to keep the GPU under a threshold. Im sure the same principle can happen with the bitburner

It would be so awesome if those bitburners would have such auto option as --avalon-auto implemented in batch #3.
--avalon-auto automatically adjusts chip freq. to the highest safe value.
Would it be hard to implement it in cgminer? or there are some hardware limitations for doing that?

SO what is the final out put of the system going to be per board is this going to be 5GH per board or are you looking to go above this 5GH rating.

Hi burnin

I sent you an email to [email protected] in regards to order 737 and order 738

Can you confirm you got it all ok? (need to change shipping details) if its possible, but no biggie if it isnt.



Thanks!

Thanks a ton Kano for your work and Burnin supplying the board!

Any eta on a cgminer release that supports the bitburner XX? - with overlocking and voltage control?

For future reference,
The modified/fixed firmware flashing program doesn't work on the RPi, but works fine on Fedora18 (and Ubuntu 12.04)
My guess would be an endian issue ...

Ok, I thought it was getting hardcoded in.

Feel free to change the settings and destroy yours when you get it - it's just an option to increase the critical temperature ...

Yeah, the sensor though is in the middle of the board, so it's not the actual ASIC temp.
I think I'll just go with the 60C as the default max temperature since it did seem to be upset 'after' it got there but was fine later.
Certainly no higher by default, but possibly even a couple lower as you suggest.
As I've mentioned, once I've got it happily running normally, I'll do testing with the fan disabled and see if I can keep it alive and kicking.

I just got the new firmware and I've now just managed to kill it trying to flash the firmware
Seems like the flash program doesn't work on the RPi ... I'll have to try on my desktop F18, or an Ubu 12.04 VM next ...
(it's 1:30am I think I need sleep and fix it in the morning ... if I can't get it working shortly)

I don't think the lifetime of this chips is as important as the payout since most of the payout is in the initial months.

Yifou stated that they did run those Chips at ~78°C and i think he stated they still were okay. (I cant quote the video source right now so dont take this as fact). He also said, that they died somewhere up to ~100°C.
I think a max cap should be somewhere at 57°C ~ 60°C to guarantee a longer lifetime.

EDIT: Found the video, watch yourself. He states, stable till 85°C and with 110°C stable for like 10 mins. But that wasnt our board and not sure how they did measure those exactly. Its just a statement.
(Check yourself, im not sure if i understood him the right way.)
www.youtube.com/watch?v=UtVx26LlNXA#t=0m51s

Yeah its possible, but it depends on the fan if it starts at a certain voltage or not.
For example if people use custom fans, their working voltage could be totally different from the origin one.
On Off shouldnt be good idea. If you do this you could create hotspots which could be problematic at higher oc.

Thanks - that answers pretty much everything.

I was thinking I just needed to put up the Freq and Voltage to get the expected hash rate.
Just hadn't got to that yet ... was looking through the avalon code about the fans and reading about them ... had to think hard just to temporarily pull your pull into my git ... I think the pain and drugs are taking their toll

Reading about the difference between 3pin and 4pin fans after discussing it with Xiangfu (Avalon uses 4) the difference is FAN_CONTROL
So does that mean I should have it simply turn it on full (when needed) and off when below say something like 40C for BTB?
It is certainly working as it is now - once it gets to 51C it has enough power to actually spin and it cools down to about 46/47 and then the fan switches off - but it seems it's trying to switch on with a too low voltage before that.
Is fan control possible with just messing with the voltage when it's a 3 pin 12V fan?
(I've no idea of course - but from what I've read, I think it should really only be hard on or off)

Also, for the Tach yeah I guess the update will fix that - coz it's returning zero always at the moment.

PM me when you have a new firmware and I'll update it straight away.

When I first plugged it in, I ran it without a fan - which I'll do again once I've sorted out the fan control
It lasts about 40/45min before it hits 60C and commits suicide (it's winter here)
I'll change it to properly shut down mining (it didn't seem to at least) and then wait for a reasonable temp drop before resuming (maybe even 15C drop?)

What are the actual expected temperatures for the BTB?
The 60C did seem to suggest it was near it's limit coz it basically got NMW's forever not long after that at least once

Coding on painkillers  

That board doesn't have production firmware on it.
So there are a few features not in there yet + a few bugs.
The FAN is 12V, but your FW might have a wrong PWM multiplier in there so its not spinning.

For updating get yourself a copy of pic32prog:
I'll prepare a hex file for you with the latest code.

The bootloader is launched on power up and has a timeout.
Remove power, apply power, launch pic32prog while the red LED is blinking (it means its in bootloader mode).
Do mind, its needs super-user rights, or matching dev rules.

Yes, U15 is the temp sensor, a Ti LM20.

Is the order status going to change from processing to anything else before the boards are shipped  (e.g. testing, ready for shipping etc.) or we're just going to get notified when they're on the way to us?

The default settings are for an Avalon, I'll change the defaults (in cgminer) for BTB once I work out what's best.

OK back ... and pain removed with a magical spell called ibuprofen+codeine
Xray showed nothing broken ... other than what was broken once a long time ago

So back to working on cgminer.

Step 1, add a fan ... and build a lego bracket for it

The lizard is looking at U15 - which I assume is the temperature sensor.
Guess I should look at the specs

Seems I'll first need to make some of the default settings a little different to the Avalon
We've committed the Burnin changes into the master cgminer so BTB is there to stay
Now I'll work on the defaults/temperature/fan code so hopefully have some useful changes soon ...

Also my fan is 12V - but I guess that may be wrong - it didn't seem to start without a flick from me so either it's only supposed to be 5V or I got a faulty fan
Dropped the temperature from 51C back down to 46C but then it switched off again and seems needs more power before it actually spins.
OK more reading I need to do

If anyone can answer here before I find it ... (the chip U15 = temp sensor and fan V is 5 or 12) ... thanks

Yes, I got it. Was just asking in case anyone has thoughts about this. Isn't the device supposed to give 6 GH/s right out of the box?

He hooked it up in a hurry and then had to go to the hospital.

kano but why such low hashrate?