BFL board project COINTAMINATION - EU facility - ORDERS OPENED for Chili

[Bogart]

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?

[GrapeApe]

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.

[Mudbankkeith]

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.

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

[asjfdlksfd]

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...

[Lucko]

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?

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...

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.

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

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...

[asjfdlksfd]

Hello Lucko,

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...

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...

[Mudbankkeith]

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?

[MrTeal]

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?

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.

[Lucko]

Hello Lucko,

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...

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...

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...

[Mudbankkeith]

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?

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.

Hi Mr Teal

Cold start and Hot start, from power on.
The only difference is the delay on hot start.That is only for a few seconds, (15 or 20)

After it has been running for about 10 mins it becomes rock steady at 166w   32.5GH  52c, error rate 7.8%.

Stopping and starting mining software causes a small spike in the hash rate but only for about 1 min, most of my miners do this.

I guess the secret is not to power it down to often.

Are these chips like strip lights (needing a power spike to start them?)

[Lucko]

I think this is your problem:

https://asktom.cf/index.php?topic=304250.msg3468682#msg3468682

Some chips overheet and slow down...

[Mudbankkeith]

I think this is your problem:

https://asktom.cf/index.php?topic=304250.msg3468682#msg3468682

Some chips overheet and slow down...

Quote from Spieder on the chili thread:-

"I've been playing around with a chili I bought on ebay with an Evo 212 until my batch 2 boards are done.

I originally booted it up with the Evo 212 and a 120mm fan blowing sideways over the vrms and caps. In bfgminer, cgminer and bfgminer on a raspberry pi the unit runs @ 37-38 ghz @ 72 C - 10% errors.

If I remove the side fan, the unit quickly readjust to 52 C and drops to about 32 ghz. So cooling those vrms is a key piece to achieving higher speeds. I know there's a lot a variability in performance based on chips but I'd tend to think if your cooling option let's you hash at 72 C then you're close to max. If your hashing at 52 C you may have room for improvement.

From the wall with my pi, I'm reading the system is pulling 175 watts at 32 ghz and 209 watts at 37 ghz. So 15% increase in ghz is roughly 25% increase in power.

Now if I could figure out how to get those errors down I'd be happy because my effective is @ 33 ghz. I'd rather run at 33 ghz @ 175 watts with no errors than 38 ghz @ 209 watts with 33 ghz effective."
End quote

I think this covers my situation almost to the letter.
So for first option is to cool the mofsets.
If that has no effect I will look at the heatsink mounting.

Thanks for the lead

[Lucko]

OK just an update. I have done all necessary staff for board production to start. I had big enough order of new boards to think it is safe to go ahead and pay first 50% of the licence. But as I was afraid I can't get them done in Slovenia but will still be done in EU. So tboards will be done(if all go to the plan) on 12th and I should get them day or two later... Then assembly and programming... I think I should be able to have last boards ready for shipping over the weekend.

I also talked with customs today. Some additional chips were processed today the rest will be processed tomorrow and should have the by the end of the week...

[Swimmer63]

Thanks for the update Lucko.  When and how do we need to pay you for the cost difference between the old, dead board and Mr. Teal's board?

[Lucko]

Thanks for the update Lucko.  When and how do we need to pay you for the cost difference between the old, dead board and Mr. Teal's board?

You will received mails today or tomorrow... I was/am jumping around like crazy to make all ready to change to this board... That is why I made Google form so I don't need to do that too. So in case someone didn't fill it assuming he doesn't have to. Assumption is probably right but please do.

[bitpop]

Did you get my chips?

[asjfdlksfd]

Hi Lucko,

when do you need latest BFL chips to solder them also to the rest of my ordered boards?

I'm consider to send you the rest of my bfl chips to solder them instead of solder them locally.

Is it possible you can send me one or two of your contamination board for experimental reasons and what should I pay for? You can send me them via padded envelope or jiffy bag. But I need them asap before all my chips has to been soldered to different ways e.g. direct jala extension,

Cheers...

[one4many]

Lucko,

can you please confirm that the Chili Baords are going to be the same as the original ones from MrTeal?
I would like to know because I need to order parts (power connectors / heat sinks and chases) upfront so I can assemble the miners with no further delay.

Also do you happen to know how much AMP they will draw per board on 12 V?

Thx in advance

   one4many

[Lucko]

Did you get my chips?

Don't worry. They are OK... I didn't process them just in case there would be a problem and I would need to send them somewhere out of EU to be processed. They are processed no on my import licence so it is OK.

Hi Lucko,

when do you need latest BFL chips to solder them also to the rest of my ordered boards?

I'm consider to send you the rest of my bfl chips to solder them instead of solder them locally.

Is it possible you can send me one or two of your contamination board for experimental reasons and what should I pay for? You can send me them via padded envelope or jiffy bag. But I need them asap before all my chips has to been soldered to different ways e.g. direct jala extension,

Cheers...

Middle of the next week.

I need  to get them form assembly. I currently don't have time(a lot of work with boards and my day-job and some personal things tomorrow). So ASAP will not work to god for me... Don't add more then 1 or 2(it will only be 3,5 chips speed) chips to Jala...

Lucko,

can you please confirm that the Chili Baords are going to be the same as the original ones from MrTeal?
I would like to know because I need to order parts (power connectors / heat sinks and chases) upfront so I can assemble the miners with no further delay.

Also do you happen to know how much AMP they will draw per board on 12 V?

Thx in advance

   one4many

I don't have licence to change it so it will be done the same way...

I don't have one to test jet but you can see what is reported in Chili thread... From what I can see there I would guess 170 at 40GH to 120 at normal 35GH to 100 at 32...

[Lucko]

There is now about 60 boards left in batch 1 if I go by orders. So time to order is running out...