Topic: The Chili – 30+GH/s BFL based Bitcoin Miner Assembly - page 24. (Read 138054 times)

I flashed it with the firmware listed in Post #2

Also disconnected everything else.

No dice

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.

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!

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.

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

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

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.

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.

The secret? Voodoo.

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

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

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.

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

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.

Nice job Hands

Didnt notice the screws didnt fit

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

Lots of posts early in this thread

Edit:-   https://bitcointalksearch.org/topic/m.3355048

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

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 ?

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.

I'm debating selling my Chili farm.  10 Chili's at 340Ghash total.