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

[MrTeal]

@Mr Teal ?
Any help ?

If it's running at 70C and 15GH/s, your issue is likely the heatsink wasn't properly mounted when you changed the thermal paste. Reseat it.

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[Walking Glitch]

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.

[jelin1984]

I have. 2 chilli for sell
Complete

Hashing at 30 gh and 35 gh

Pm me

[lin0sspice]

Ok, i will try today.

[i3luefire]

How much money would it take to get the z-link finished? BTC0.25? BTC0.5?

[lightfoot]

By the way, some heat sink notes:

Unit was hashing at about 35gh, water cooling block on top (sedion), been running for months. Finally decided to pull the sink and put some authentic artic pads on the units to speed things up.

Back together, speed is 5gh. Um....

Took apart, put artic silver on block and on each chip. Smoothed out, put together, 15gh. Took apart, put together, 20gh. Took apart, smoothed silver on two chips, put together, ZILCH. Board must have shorted.

Sigh. Started over, cleaned board, cleaned between chips, over and over, cleaned plate, put artic silver in a thin amount on plate, smoothed with razor blade, nothing on chips, put together, 35gh.

I give up. :-)

[lin0sspice]

I got same problem, i now start to put thermal paste instead of thermal pad
I was 29-30 but now only 16-17GH )

[lightfoot]

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

[ZBC3]

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.

[MrTeal]

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

[Walking Glitch]

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]

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]

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.

[lightfoot]

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

[Mudbankkeith]

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?

[lin0sspice]

use thermal paste , that is best, make my chili is coming back to 32-33 gh )
Thermal pad is not that good.

[nexus99]

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

[Cascaders28]

use thermal paste , that is best, make my chili is coming back to 32-33 gh )
Thermal pad is not that good.

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.

[lightfoot]

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

[joeventura]

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