Topic: BFL board project COINTAMINATION - EU facility - ORDERS OPENED for Chili - page 26. (Read 73149 times)

All is just a guess but if I go from what we see and what MrTeal figure out too I would guess that 0.8 to 0.85V is strange range that hangs chips and they don't respond any more(being busy)... It could be just really unlucky coincident with power module that we used and any other would be just fine. But as I stated at the start this is just a guess what is going on. It explains what is going on but it could be something complicity different. Unfortunately there is just no more time to make any big debugging and changes...

That is odd behavior. Is that from a cold start when you plug it in, or after it's been sitting awhile and you are just starting the mining software.

My first observations now that my Chili has been online for 2 days.

The chili starts up with a big power draw, 200w+ and a hash rate of 38/39GH, temp at 75c with a massive error rate 15% (as if in an overclock condition)
If the chips are hot, there is a delay in startup, till the fan drops the temp. (It would possibly be a good idea for power-on after fan-on delay)

Then drops steadily for about 10 mins to 166w   32.5GH  52c, error rate 7.8%

Normal practice would be to start up low and increase to the maximum stable state.

The chili starts at full throttle and then slows down.  (you would never do this to a car).

Does any body else have any observations from their chilli?

Hello Lucko,

I understood core voltage initialization of the chips must be different from the running core voltage?

If so do you know when the voltage must be switched exactly and which are the values?

Do you know where a documentation of the chips is available about this change? I've only BFL_SHA2_Spec_Rev2.2.pdf here. Maybe there is a newer one?

Maybe a resistor in line of the trimmer can be used to short them before or after initialization, but I need more details.

Cheers...

Can you please just fill up a form please...

About power on... We guess if we use different power supply or a way to cut and then turn on power it would work... But in both cases we need to change the board... Chips just hang and will not work... At some point we did get 16 chips working but that was one time deal at minimal frequency and a lot of luck. In most cases you see 3 to 6 chips working if Atmel comes on line... And all 3 boards acts about the same so I don't think there is a point in guessing that there might be just a assembly problem. Boards were looked over by form in details...
As setted in terms of sells. Boards will be made same way as MrTeal boards. So no cooling. You can buy whatever you like... If I can find a good deal for coolers I will include it as an option...

Hello,

you got allready 16 chips from me. I've ordered with your form now 10 boards where 2 should be configured with all 2x8 chips, the other 8 pcbs I want to get without chips but with all parts.

Cheers...

Steady at 57C and 32GH. Super quiet cooling (it's house friendly) after that it is down to price and personal preference.

Edit:- Coolermaster Hyper212 Evo CPU Cooler with backplate

2nd edit:- Hyper212 is £ 10 cheaper than Accelero on Amazon

I have an Accelero Twin Turbo 2 cooler on mine sitting on four pegs or feet to raise it up a little. It runs at 70C in a warm room. Mudbankkeith's Chili is running cooler but i think the target temp is 70C-72C (I could be wrong) and I would rather it be a little lower profile than his but I'm comfortable with whatever you decide.

I'd like to keep my orders with you for my 112 chips.  PM me the details of the balance to be paid plz.

This is an unfortunate situation for both of us, and I place 100% of the blame on BFL.  I mean, the purpose of sample chips is to have a solid reference to design against.  The production chips are not supposed to be freakin' *DIFFERENT* in any way, but BFL went and changed them, and now it's costing both of us time and money.

Edit: So I guess there isn't any way to change the low-voltage-at-startup behavior of the existing boards, eh?

Well it will require new board for sure to fix this. Changing firmware didn't help... Chips are definitely different. They have engine 0 working... So that is a bonus but unfortunately this chip change by BFL is not compatible with this board(not engine 0 itself but the way they act at low voltage at startup(we think)).

I think the only way is Chili since redesign would take just too long... So I will go with backup plan... If anyone doesn't like that let me know and I will send him chips and refund(if he paid already).

So for thous interested in Chili board it will be done the same way as it was done by MrTeal

https://bitcointalksearch.org/topic/the-chili-30ghs-bfl-based-bitcoin-miner-assembly-304250

Batch 1 will have price of 320$ for any new order and 300$ for already received and paid orders, groupbuy buyers and chips donors. After that there will be small batches and price will got up to 350$.

Since I lost massive amount of money on this I need at lest 50 paid boards orders to start. I don't have enough to start without that. Need to pay licencing and new batch of boards.

If I can't get that many orders I will just refund anyone and send you chips. Sorry...

Timeline. After I get 50 boards paid I will paid for licence and get files. After that I need 5 to 10 days to get new boards and max 5 days to get them assembled... After that I will need some time to program and test then. I was told it is about 10 minutes per board. So I will need some time to do that as well. Don't know how many boards will be but will be processed in a order of arrived orders. I will do my best to do all ASAP but it will take till 11/15 do 11/18 in best case if I get enough orders over the weekend.

How to order:
You fill out this order form:
https://docs.google.com/a/prorang.si/forms/d/1SeHqK95mbnxvvGqWmIjLM2L1nTFd5DSQDrfFwhWt3Zc/viewform

Batch 1 orders will be open till boards will be available or send to assembly. After that you will need to wait for Batch 2 boards.

Possible additional parts:
Thermal pads for chips. Enough for 1 board (5$). http://www.frozencpu.com/products/16875/thr-161/Fujipoly_Extreme_System_Builder_Thermal_Pad_-_Full_Sheet_-_300_x_200_x_05_-_Thermal_Conductivity_110_WmK.html
PCB PC BRACKET STD PCI (3$). http://eu.mouser.com/ProductDetail/Keystone-Electronics/9203/?qs=sGAEpiMZZMtzcnMBgC2bs6gC270mlsjAcmixu2SULFc=
Will add some coolers when I get the idea what is needed. I have already bought 1 Chili from MrTeal so I will be able to test that soon...

He is making some progress but noting good at the moment...

Hello lucko

Any news from Form?

Regards

I'm happy to hear that.

I got my full reimbursement check from JJ and he sent my chips to Lucko who is trying to get them out of Slovenia customs.  I was the first person to get bulk chips so I've lost significant hash time but JJ is out significant investment in time and money for parts and Lucko and his team are trying hard to fix their boards.  So just to be clear, there is no evidence of a scam here.

Batch 2 news

Not yet(if you look at tracking)... They don't like the fact that there are 3 chips missing(samples send ahead). I'm guessing that this is a case could be something else I know that I have invoice for 200(batch 1) and 116(batch 3) and the number don't match(this is how was explained to me)... Could be some extra chips don't know... They contacted BFL for explanations...

I also resend mail(John) couple of times and calling number in mail(John). No replay or answer... But my BFL account shows batch 2 as not paid... I did send link on Bitpay to John that show it was...

Did they make out of customs? Any news on batch 2?

Coinado is the same board but doesn't have 3,3V power supply... It comes out of computer PSU. And it is the same as Cointamination just 1/4 of the power. So only 4 to 5 chips possible... If this one has problems that one will have them too... And we don't have boards ready so it is the same as if we make new board(MrTeal or fixed Cointamination)...

You beat me to that question.
It can be a quick fix for me.
My question was to ask if Coinado was still possible, or is the Cointamination board just 2/4 Coinado's joined up to one controller?

OK, Only one more thing: I don´t have all information but recover last working design and revert to older conirado boards is a possibility ?