The Chili – 30+GH/s BFL based Bitcoin Miner Assembly

[SosDk]

Got the Chili + Evo 212 cooler. But I cant seem to make the cooler fit.....did anyone make a Youtube video on how to Mount ? Or pics ?

Lots of posts early in this thread

Edit:-   https://bitcointalk.org/index.php?topic=304250.msg3355048#msg3355048

The feet do not work(holes in the board are too small)

Didnt notice the screws didnt fit

What to do to get it running today when in Denmark......

[1715541501]

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[1715541501]

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[1715541501]

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[GrapeApe]

Getting 33 to 35 ghash per card on low fan.  37+ on high.

H80 waterblocks

Cases were about $5.00/piece in raw material ( I have my own laser cutter) and the coolers were refurbished so I picked them up for a song.  Power supplies are just 500 watts so only 2 cards per supply. But they were pretty cheap too.

The slowest par of the setup was the cases took an hour each to burn on the cutter. It was a nice weekend project.

Nice job Hands

[MrTeal]

Got the Chili + Evo 212 cooler. But I cant seem to make the cooler fit.....did anyone make a Youtube video on how to Mount ? Or pics ?

Lots of posts early in this thread

Edit:-   https://bitcointalk.org/index.php?topic=304250.msg3355048#msg3355048

The feet do not work(holes in the board are too small)

Didnt notice the screws didnt fit

What to do to get it running today when in Denmark......

There's a couple mods you can do to use the included hardware and the longer standoffs. Remove the screws from the cross brace and toss a couple #10 nuts (or some other space) on them, then put the spring and retaining clip back on.



The less annoying and higher performance method (the backplate is in the better orientation) is to use some M4x50mm screws to hold it in place though.

[lightfoot]

Quick heat question: My Chili is expected tomorrow, but my heat sink is not coming till Tuesday. Would it be suicide to put an older IBM X series big copper heat sink on top of it and try it out? Will the chips burn out, or take damage?

C

They should throttle down if contact is crappy, but I still wouldn't. Up to you though.

And it looks like my NewEgg Cooler-master 120 just arrived this morning, so I should have something to play with today.

This will be fun.

C

[plasticuser]

I am working on some firmware updates that will fix most (or all?) of the problems the boards are having.  For example, one failure I think I have figured out is occasionally a board will jump to more than 100 GH/s but have 100% hardware errors.  I have one board that does this once per day or so and needs to be rebooted.  After chasing this for a while, I believe I have finally figured out what is going on and will have a fix in the next release.

I have a semi-dead board I recently bought from Keefe that does exactly this. It has always been prone to freezing. I received it from him last Friday, then went out of town overnight. On Saturday it was hung hard, and no amount of restarting/cooling would help it. It has been thoroughly inspected and has no visible flaws. There was an apparent short 3v3->ground, but I found some TIM under the edge of an ASIC, so overnight cleaning in an ultrasound bath should have removed all debris. (The TIM had an electrical conductivity I could measure with my ohmmeter.)

Now, it starts seemingly normally, then reports a ridiculously high speed, 100% error rate for 10 proofs, and stops. BFGminer reports it as sick, 27C. I don't know how to tell what firmware it has, etc.

Any suggestions welcomed.

[MrTeal]

I am working on some firmware updates that will fix most (or all?) of the problems the boards are having.  For example, one failure I think I have figured out is occasionally a board will jump to more than 100 GH/s but have 100% hardware errors.  I have one board that does this once per day or so and needs to be rebooted.  After chasing this for a while, I believe I have finally figured out what is going on and will have a fix in the next release.

I have a semi-dead board I recently bought from Keefe that does exactly this. It has always been prone to freezing. I received it from him last Friday, then went out of town overnight. On Saturday it was hung hard, and no amount of restarting/cooling would help it. It has been thoroughly inspected and has no visible flaws. There was an apparent short 3v3->ground, but I found some TIM under the edge of an ASIC, so overnight cleaning in an ultrasound bath should have removed all debris. (The TIM had an electrical conductivity I could measure with my ohmmeter.)

Now, it starts seemingly normally, then reports a ridiculously high speed, 100% error rate for 10 proofs, and stops. BFGminer reports it as sick, 27C. I don't know how to tell what firmware it has, etc.

Any suggestions welcomed.

Keefe had batch 1 boards (-0XXX serial numbers) so it's likely an older version. It couldn't hurt to update.

[lightfoot]

NOt bad. Board came today, so I assembled it with the $49 water cooling thing, some washers to hold the heat sink on those stupid sockets, and off we go.

Speed at first was good, but was rejecting 25% of my work. Restarted BFGMiner, cut the speed on the pump somewhat with an inline resistor, and now I am getting 65c, 38/38/36 (why is acknowledged shares always so much lower???) with a HW error rate of 5.7% and a R rate at the moment of 0. I might try slowing down the fan on the radiator a bit as well, loud.

Note: Running the water pump slower cuts down on noise a lot and increases thermal effectiveness. I'm guessing because the dwell time of the water on the plate allows a higher joule count when the flow rate is below turbulence levels. But then again I flunked fluid dynamics.

Overall not too bad. Wish I had bought a dozen, but this little guy should make back it's .7 investment. And it's cute too!

Very impressed Mr. Teal. If we ever meet at some meetup I'll buy you a beer and you can tell me how you got all 8 chips >4gh.

C

[MrTeal]

NOt bad. Board came today, so I assembled it with the $49 water cooling thing, some washers to hold the heat sink on those stupid sockets, and off we go.

Speed at first was good, but was rejecting 25% of my work. Restarted BFGMiner, cut the speed on the pump somewhat with an inline resistor, and now I am getting 65c, 38/38/36 (why is acknowledged shares always so much lower???) with a HW error rate of 5.7% and a R rate at the moment of 0. I might try slowing down the fan on the radiator a bit as well, loud.

Note: Running the water pump slower cuts down on noise a lot and increases thermal effectiveness. I'm guessing because the dwell time of the water on the plate allows a higher joule count when the flow rate is below turbulence levels. But then again I flunked fluid dynamics.

Overall not too bad. Wish I had bought a dozen, but this little guy should make back it's .7 investment. And it's cute too!

Very impressed Mr. Teal. If we ever meet at some meetup I'll buy you a beer and you can tell me how you got all 8 chips >4gh.

C

The secret? Voodoo.

[twib2]

This is a Linux house no windows here. Is there a way to flash the firmware using Ubuntu?

Edit: Had to partition a space on the drive and install xp (aaarrggg) got them flashed and took a small hit on the hash rate but they are running. Thank You

BTW, you can actually flash the chili from within a VirtualBox image using XP.  You just have to make sure you allow the USB ID to go through, and then it works just fine.  So: create virtualbox, install xp, add driver for bfgminer for chili, flash the chili, remove virtualbox, and you're not inflicted with windows for very long.  We are mostly windows-free, too - I just keep an image around for just these types of things.

[lightfoot]

This is a *very* unusual board. Cooling is God, but what produces the highest hashes is not always what you think it will be.

For example, it's currently at 65-70c and hashing at 36gh+. Right now the fan on the radiator is at full speed, and the pump is running slower than normal. If I stop the fan the temp on the board drops down to 50c, but the hashing rate falls to 31gh as the water temp in the loop goes up. Spin up the fan again and speeds climb along with board temp.

I think one of the things Mr. Teal is doing here is watching temps *on the chips themselves* and adjusting his hashes. My error rate is a rock solid 5.1%, that might also be in the code. But it's possible that chip temps could go up, hashing would slow, which would lower board temps. The BFL units only have board temp sensors so they run more conservatively.

However man does this dopey water cooler work. For $40 or whatever I got it for on Ebay it's doing one heck of a job. The secret though is to reduce the pump speed a bit. Try it and see if that boosts you up in speed. Also what's the fastest Chili out there (I still intend on putting an air cooled heat sink on this thing's bottom. Might get more performance!)

But all this also means I should really push my turbo jallies a *lot* harder. Time to start overriding the clock speeds and gunning them up a bit. However you can't do that on a stock BFG 25/30 or 50/60 as the 1 volt power supplies will not handle the load. Mr. Teal built a... bigger... solution there.

[Mudbankkeith]

NOt bad. Board came today, so I assembled it with the $49 water cooling thing, some washers to hold the heat sink on those stupid sockets, and off we go.

Speed at first was good, but was rejecting 25% of my work. Restarted BFGMiner, cut the speed on the pump somewhat with an inline resistor, and now I am getting 65c, 38/38/36 (why is acknowledged shares always so much lower???) with a HW error rate of 5.7% and a R rate at the moment of 0. I might try slowing down the fan on the radiator a bit as well, loud.

Note: Running the water pump slower cuts down on noise a lot and increases thermal effectiveness. I'm guessing because the dwell time of the water on the plate allows a higher joule count when the flow rate is below turbulence levels. But then again I flunked fluid dynamics.

Overall not too bad. Wish I had bought a dozen, but this little guy should make back it's .7 investment. And it's cute too!

Very impressed Mr. Teal. If we ever meet at some meetup I'll buy you a beer and you can tell me how you got all 8 chips >4gh.

C

The secret? Voodoo.

Please do'nt pin up the rest of the BFL staff till after they deliver my MONARCH

[handytxg]

Hi, my temp are low but I get only 25ghs any idea why?
Do you guys have suggestion to improve the performance?
I use Cooler Master 212 X
Thanks

[Mudbankkeith]

Hi, my temp are low but I get only 25ghs any idea why?
Do you guys have suggestion to improve the performance?
Thanks

get a small fan (and/or some heatsinks) on the mosfets.
The chip temp should rise to 70c and the hash rate will increase.

If this does not work then check the cooler contact on the chips.

[joeventura]

Just got two new boards from Mr Teal

Win 7 with 3 BFL devices that work just fine,

Add the Chili and its recognized by BFGminer but 100% rejects while the BFL devices work just fine.

Any secret I am missing?

I cant have two bad boards!

[Bargraphics]

Just got two new boards from Mr Teal

Win 7 with 3 BFL devices that work just fine,

Add the Chili and its recognized by BFGminer but 100% rejects while the BFL devices work just fine.

Any secret I am missing?

I cant have two bad boards!

Unplug it from the USB and plug it into a different slot (Make sure BFGMiner is fully closed).

Then unplug the power/replug the power, wait for all the lights to stop blinking. Pull up BFGMiner and see if you get the same issue.

If you so then it might just need a Firmware flash.

[joeventura]

Just got two new boards from Mr Teal

Win 7 with 3 BFL devices that work just fine,

Add the Chili and its recognized by BFGminer but 100% rejects while the BFL devices work just fine.

Any secret I am missing?

I cant have two bad boards!

Unplug it from the USB and plug it into a different slot (Make sure BFGMiner is fully closed).

Then unplug the power/replug the power, wait for all the lights to stop blinking. Pull up BFGMiner and see if you get the same issue.

If you so then it might just need a Firmware flash.

I flashed it with the firmware listed in Post #2

Also disconnected everything else.

No dice

[Bargraphics]

Have you tried using the latest BFGMiner? 3.2.8 is a little outdated. Not sure if this will fix your issue though.

[joeventura]

Have you tried using the latest BFGMiner? 3.2.8 is a little outdated. Not sure if this will fix your issue though.

That was it!

Now they are working,

Block Erupters stopped working however with 3.8.1

[lightfoot]

-S all works for me with 3.8.1

However I have a question: BFG keeps reporting the local hash rate for the Chili+2 jallies as 62/64/60. Why is my submitted shares so much lower; looks like I am losing 5gh.

Chili is the bigger one 38/38/35gh. .7% rejected, 5.5% error rate.

Anything special I need to set in BFG (Windows 32 bit)

[joeventura]

Now I have one mining and the other mines for a few minutes then switches to a gazillion gigahash and 100% HW errors