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

[ChipGeek]

cgminer is stopping work because one of the cores is too hot. I find that will happen if I haven't done a good job of mounting the heatsink; I'll see most of the chips sitting at 60-70 and one will shoot up to 100. The back and forth with cgminer is something we'll fix in a FW update, but the root cause is bad heatsink contact.

Will look into it but since reported temperature starts at 35 and go to 66 I don't think this is it... Unless we don't see highest temperature reported...

Replaced thermal pads... And problem fixed... But why I didn't see this hi temperature reported in cgminer? And got speed for 37.2 to 39.8

I'm actually not sure, obviously it's getting reported to cgminer since it is throttling. It must be displaying just one of the temps and not the other.

As for reporting all of them, it's in the works probably through a custom Z*X command. We just need to implement it, and then get support added to the mining software.

Throttling should be reduced in the next firmware release.  Part of the problem was that if Chili was idle because the host mining software was not sending any jobs (perhaps it's not started yet or there is a problem with the pool connection), then Chili would cool off and notice that it could crank up the frequency and voltage.  This is bad when work unit start coming again because it is now running too fast & hot.

New firmware will not change frequency or voltage when there are no work units in the queue.  I'm testing that and other fixes now.

Edit: The temperature that is reported is the temperature of the hottest ASIC chip.

[Keefe]

cgminer is stopping work because one of the cores is too hot. I find that will happen if I haven't done a good job of mounting the heatsink; I'll see most of the chips sitting at 60-70 and one will shoot up to 100. The back and forth with cgminer is something we'll fix in a FW update, but the root cause is bad heatsink contact.

Will look into it but since reported temperature starts at 35 and go to 66 I don't think this is it... Unless we don't see highest temperature reported...

Replaced thermal pads... And problem fixed... But why I didn't see this hi temperature reported in cgminer? And got speed for 37.2 to 39.8

I'm actually not sure, obviously it's getting reported to cgminer since it is throttling. It must be displaying just one of the temps and not the other.

As for reporting all of them, it's in the works probably through a custom Z*X command. We just need to implement it, and then get support added to the mining software.

Throttling should be reduced in the next firmware release.  Part of the problem was that if Chili was idle because the host mining software was not sending any jobs (perhaps it's not started yet or there is a problem with the pool connection), then Chili would cool off and notice that it could crank up the frequency and voltage.  This is bad when work unit start coming again because it is now running too fast & hot.

New firmware will not change frequency or voltage when there are no work units in the queue.  I'm testing that and other fixes now.

Edit: The temperature that is reported is the temperature of the hottest ASIC chip.

Is there also a temp sensor in the VRM area that the firmware watches but doesn't report?

[MrTeal]

cgminer is stopping work because one of the cores is too hot. I find that will happen if I haven't done a good job of mounting the heatsink; I'll see most of the chips sitting at 60-70 and one will shoot up to 100. The back and forth with cgminer is something we'll fix in a FW update, but the root cause is bad heatsink contact.

Will look into it but since reported temperature starts at 35 and go to 66 I don't think this is it... Unless we don't see highest temperature reported...

Replaced thermal pads... And problem fixed... But why I didn't see this hi temperature reported in cgminer? And got speed for 37.2 to 39.8

I'm actually not sure, obviously it's getting reported to cgminer since it is throttling. It must be displaying just one of the temps and not the other.

As for reporting all of them, it's in the works probably through a custom Z*X command. We just need to implement it, and then get support added to the mining software.

Throttling should be reduced in the next firmware release.  Part of the problem was that if Chili was idle because the host mining software was not sending any jobs (perhaps it's not started yet or there is a problem with the pool connection), then Chili would cool off and notice that it could crank up the frequency and voltage.  This is bad when work unit start coming again because it is now running too fast & hot.

New firmware will not change frequency or voltage when there are no work units in the queue.  I'm testing that and other fixes now.

Edit: The temperature that is reported is the temperature of the hottest ASIC chip.

Is there also a temp sensor in the VRM area that the firmware watches but doesn't report?

Yeah, it's the little 3 pin chip marked U25 between the middle two MOSFETs.

[i3luefire]

Any updates on batch 2 production status?
0-25%
25-50%
50-75%
75%-finished

[ChipGeek]

Any updates on batch 2 production status?
0-25%
25-50%
50-75%
75%-finished

0-25%

[xselam1988]

Any updates on batch 2 production status?
0-25%
25-50%
50-75%
75%-finished

[Lucko]

Anyone found a graphic card cooler that would work good with this board?

[BrimStone]

Anyone found a graphic card cooler that would work good with this board?

I have been using the Arctic Accelero Twin Turbo II for these with good results.  I bought the Arctic back plates as well to give the board more support.

[jelin1984]

Me too twin turbo 2 hashing at 32 to 36 gh per board

[agibby5]

Anyone found a graphic card cooler that would work good with this board?

I have been using the Arctic Accelero Twin Turbo II for these with good results.  I bought the Arctic back plates as well to give the board more support.

Do you have a link to the back planes?

[BrimStone]

Anyone found a graphic card cooler that would work good with this board?

I have been using the Arctic Accelero Twin Turbo II for these with good results.  I bought the Arctic back plates as well to give the board more support.

Do you have a link to the back planes?

The page is messed up on the Arctic site but here it is:

http://www.arctic.ac/us_en/eva-foam-and-gpu-back-plate.html

Here is the cooler:

http://www.arctic.ac/us_en/products/cooling/vga/accelero-twin-turbo-ii.html

[agibby5]

Anyone found a graphic card cooler that would work good with this board?

I have been using the Arctic Accelero Twin Turbo II for these with good results.  I bought the Arctic back plates as well to give the board more support.

Do you have a link to the back planes?

The page is messed up on the Arctic site but here it is:

http://www.arctic.ac/us_en/eva-foam-and-gpu-back-plate.html

Here is the cooler:

http://www.arctic.ac/us_en/products/cooling/vga/accelero-twin-turbo-ii.html

Yeah, shipping on that site is ridiculous.

[i3luefire]

BTC1  =  $420

[agibby5]

BTC1  =  $420

I'm waiting on 4 Chili's at an average price of 4.5 BTC.

[Lucko]

OK I will asked differently. Did anyone find graphic card cooler that gets out 40GH? I found 2 CPU coolers that gets 40 out but not a GPU that will get more then 36GH. And I'm looking at less then 30$...

[Keefe]

OK I will asked differently. Did anyone find graphic card cooler that gets out 40GH? I found 2 CPU coolers that gets 40 out but not a GPU that will get more then 36GH. And I'm looking at less then 30$...

I think the real key is cooling the VRMs.

[Mudbankkeith]

I managed 42Gh for 10 mins

evo 212,   with extra 80 mm fan on mosfets.(gets another 5Gh)

Ambient background about 0c.   Then I had to close the window. (G** its cold outside)

European winter, in a well ventilated outhouse, is my proposed mining facility.

[Spieder]

How's everything going with the production? It's been quiet so I assume that's good.

[MrTeal]

How's everything going with the production? It's been quiet so I assume that's good.

Check your email.

[MrTeal]

Alright, the vast majority of batch 2 is out now. Thanks for everyone who bought boards in this round, it definitely didn't go as smooth as I would have liked with the PCB problems, but in the end it worked out pretty well.