The Chili – 30+GH/s BFL based Bitcoin Miner Assembly - page 10.

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: Min€r on March 02, 2014, 03:20:41 AM

Hi,

I have more Chilis - any idea why on one board Windows is getting "unknown device"? Finally the Chili never get detected as COM.
The website with the FTDI-drivers is too offline: http://www.ftdichip.com/Drivers/VCP.htm - so maybe someone can share them.

Thanks for your help!

Did it just recently start this? Try uninstalling the unknown device in Windows and then plugging it back in.

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: HammerHedd on March 02, 2014, 01:03:51 PM

I just compiled cgminer 4.0.0 on Ubuntu 13.10 and now my chili is no longer being detected. Is there something new with the configuration, or did I just miss a switch when I compiled it?

4.0.0 precompiled binaries work for me, so I'd guess it was a compile problem.

HammerHedd

full member

Activity: 168

Merit: 100

I just compiled cgminer 4.0.0 on Ubuntu 13.10 and now my chili is no longer being detected. Is there something new with the configuration, or did I just miss a switch when I compiled it?

Min€r

sr. member

Activity: 359

Merit: 250

Hi,

I have more Chilis - any idea why on one board Windows is getting "unknown device"? Finally the Chili never get detected as COM.
The website with the FTDI-drivers is too offline: http://www.ftdichip.com/Drivers/VCP.htm - so maybe someone can share them.

Thanks for your help!

daemonfox

hero member

Activity: 630

Merit: 500

I would also like to throw out there that mine has been rock solid... and only got better when I changed from the Arctic II with just pads to the H60 with pads and the already layered paste on the block... went from ~31 GH/s to an easy 33-35 depending on ambient... been a weird winter around my parts...

lin0sspice

legendary

Activity: 1190

Merit: 1002

Oh ok.,
I used the stock air cpu cooler. Cooler master i guess, THe one 30$ come with the chili

joeventura

hero member

Activity: 854

Merit: 500

I had one bum unit that Mr Teal fixed, since then all 3 solid as a rock.

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

As a data point I have never had to restart my Chili other than when I was swapping power supplies or fiddling with the heat sink. Otherwise it has been solid as a rock.

C

Cascaders28

full member

Activity: 195

Merit: 100

Quote from: lin0sspice on February 26, 2014, 11:25:47 PM

use thermal paste , that is best, make my chili is coming back to 32-33 gh

)
Thermal pad is not that good. Sad

I think a lot of this depends on the thermal pad, the cooler, how it is all attached, what kind of backplate you're using, and if you've got VRM cooling or not. I have 2 Chilis and one is air cooled with a thermal pad and the other is water cooled and I just left the stock thermal paste on the water block. They've both got heatsinks on the mofsets and on the under side of the boards with fans pointed over them. The air cooled one registers slightly higher speeds but has a few more errors. After discounting errors they each average 36+ but I've found that even the slightest bit of tweaking in either direction can make things a bit better, or considerably worse. I enjoy playing with them but once I got them solid I just left them alone! Now they just require a restart about once a week but thats probably because I'm mining on Windows more than a fault of the Chilis.

nexus99

legendary

Activity: 910

Merit: 1000

I have a couple of these for sale if anyone is interested.

lin0sspice

legendary

Activity: 1190

Merit: 1002

use thermal paste , that is best, make my chili is coming back to 32-33 gh

)
Thermal pad is not that good. Sad

Mudbankkeith

hero member

Activity: 868

Merit: 1000

Quote from: lightfoot on February 25, 2014, 07:12:35 PM

I wish it was possible to tell me which chip was giving 6% of the errors. I'd love to pull it and swap in a new one.

C

It may be your best chip! Dumping errors to slow itself down to the speed of the collective?

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

I wish it was possible to tell me which chip was giving 6% of the errors. I'd love to pull it and swap in a new one.

C

Walking Glitch

sr. member

Activity: 252

Merit: 250

Amateur Professional

Quote from: MrTeal on February 24, 2014, 10:20:38 PM

Quote from: Walking Glitch on February 24, 2014, 10:05:27 PM

Quote from: Walking Glitch on February 21, 2014, 08:01:49 PM

I've seen screenshots with stat readouts for the individual hashing engines. Is this possible with the chili? My hashrate is only 29GHs right now, and I have a suspicion it's got to do with the coverage of this heatsink, but the easy way to tell would be if a bunch of engines are down on a chip or two.

anyone?

Are you talking about where it shows 0a, 0b, etc?
That's a BFL-centric thing. BFL issues a single job to each chip, while we issue a single job to the Chili and divide it between the 8 chips on the board. The per-chip hashing stats aren't externally accessible.

Ahh, alright, thanks.

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: Walking Glitch on February 24, 2014, 10:05:27 PM

Quote from: Walking Glitch on February 21, 2014, 08:01:49 PM

I've seen screenshots with stat readouts for the individual hashing engines. Is this possible with the chili? My hashrate is only 29GHs right now, and I have a suspicion it's got to do with the coverage of this heatsink, but the easy way to tell would be if a bunch of engines are down on a chip or two.

anyone?

Are you talking about where it shows 0a, 0b, etc?
That's a BFL-centric thing. BFL issues a single job to each chip, while we issue a single job to the Chili and divide it between the 8 chips on the board. The per-chip hashing stats aren't externally accessible.

Walking Glitch

sr. member

Activity: 252

Merit: 250

Amateur Professional

Quote from: Walking Glitch on February 21, 2014, 08:01:49 PM

I've seen screenshots with stat readouts for the individual hashing engines. Is this possible with the chili? My hashrate is only 29GHs right now, and I have a suspicion it's got to do with the coverage of this heatsink, but the easy way to tell would be if a bunch of engines are down on a chip or two.

anyone?

MrTeal

legendary

Activity: 1274

Merit: 1004

Quote from: lin0sspice on February 23, 2014, 11:48:43 PM

I got same problem, i now start to put thermal paste instead of thermal pad Sad

I was 29-30 but now only 16-17GH

)

I would really check your heatsink setup again. Are you using a backplate, and if so what kind? The system will adjust the voltage to the chips in order to try and keep them from reaching dangerous levels which will limit the hashing speed. If you're hitting 17GH/s and are at 70C, something is wrong there.

ZBC3

sr. member

Activity: 361

Merit: 250

I expierenced the reduced hashing power on one board after removing the heat sink. However, I was able to correct the problem by reattaching the twin turbo heat sink with thermal paste, and without bending the board.

Out of curiosity, have you tried a different PSU to see if that makes a difference?

I had a separate issue with PSU going out on me, an it was slowing down the reported hashing power of my board.

lightfoot

legendary

Activity: 3164

Merit: 2258

I fix broken miners. And make holes in teeth :-)

Quote from: lin0sspice on February 23, 2014, 11:48:43 PM

I got same problem, i now start to put thermal paste instead of thermal pad Sad

I was 29-30 but now only 16-17GH

)

Yup. Use a tiny bit of artic silver type stuff on the sink, the mirror finish on the chips means you don't have to pre-treat them.

I'm thinking Mr. Teal's code is checking the temps on the chip, so any little difference is picked up immediately as opposed to allowing the thermal mass of a pad to compensate.

32gh here, happy.

lin0sspice

legendary

Activity: 1190

Merit: 1002

I got same problem, i now start to put thermal paste instead of thermal pad Sad

I was 29-30 but now only 16-17GH

)

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