Butterfly Labs - Bitforce Single and Mini Rig Box - page 19.

kano

legendary

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Linux since 1997 RedHat 4

Quote from: nedbert9 on May 26, 2012, 09:03:19 AM

Quote from: BFL-Engineer on May 26, 2012, 05:36:27 AM

Quote from: needbmw on May 26, 2012, 02:45:48 AM

Where the thermo sensor is located? Why one single starts throttling at 60C, and another at 50C in the same ambient conditions? Is it possible one of sensors gives wrong temperature readout?

Each board has it's own personality, and the sensor is provided as a point of reference for
that specific board.

Regards,
BF Labs Inc.

Please send me only the overachiever type personality boards pls. Thnks.

Hmm - well since they test them in advance
(and also know where they got the FPGA's from for each board i.e. new/second hand/whatever other option is possible)
they would actually know that before sending one to you.
Maybe when the EP3SL150 supply under $2000 begins to dry up, they'll start selling them price based on good or bad performance?

2112

legendary

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Quote from: nedbert9 on May 26, 2012, 09:03:19 AM

Please send me only the overachiever type personality boards pls. Thnks.

And send the underachiever ones to the boarding school with military regimen, it has been shown that they improve the expected achievement.

nedbert9

sr. member

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Inactive

Quote from: BFL-Engineer on May 26, 2012, 05:36:27 AM

Quote from: needbmw on May 26, 2012, 02:45:48 AM

Where the thermo sensor is located? Why one single starts throttling at 60C, and another at 50C in the same ambient conditions? Is it possible one of sensors gives wrong temperature readout?

Each board has it's own personality, and the sensor is provided as a point of reference for
that specific board.

Regards,
BF Labs Inc.

Please send me only the overachiever type personality boards pls. Thnks.

BFL-Engineer

full member

Activity: 227

Merit: 100

Quote from: needbmw on May 26, 2012, 02:45:48 AM

Where the thermo sensor is located? Why one single starts throttling at 60C, and another at 50C in the same ambient conditions? Is it possible one of sensors gives wrong temperature readout?

Each board has it's own personality, and the sensor is provided as a point of reference for
that specific board.

Regards,
BF Labs Inc.

needbmw

legendary

Activity: 1302

Merit: 1008

Where the thermo sensor is located? Why one single starts throttling at 60C, and another at 50C in the same ambient conditions? Is it possible one of sensors gives wrong temperature readout?

rjk

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Activity: 448

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1ngldh

Quote from: fizzisist on May 25, 2012, 12:58:39 PM

Quote from: Cablez on May 24, 2012, 04:55:53 PM

Considering BFL has already created a waterblock they should start selling those on their site as well. Then we can wait 4 weeks for 2 different items.........I kid I kid! Grin

I thought O_Shovah made that. Was BFL claiming it as their own?

Nope. Click this: http://www.butterflylabs.com/production-update/ and scroll down a little ways. They have a redesigned PCB to support the block, because the current one doesn't have mounting holes that would work with a waterblock.

fizzisist

hero member

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Quote from: Cablez on May 24, 2012, 04:55:53 PM

Considering BFL has already created a waterblock they should start selling those on their site as well. Then we can wait 4 weeks for 2 different items.........I kid I kid! Grin

I thought O_Shovah made that. Was BFL claiming it as their own?

bitpop

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SgtSpike

legendary

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Quote from: Unacceptable on May 24, 2012, 05:18:06 PM

These units were designed to run in a commercial temp controlled enviroment @ 72 degrees f.Since they are not being run in such an enviroment,i.e. homes & offices where temp is not a mandatory 72 degrees,we are seeing these "overheat" issues.IMO.Plus the varience on a chip by chip basis as well.

Its was a choice they made when designing these devices.Personally I think it wasn't a good decision.Knowing full well the general public was going eat these up like candy.

I'm an A/C install & service tech & know of very few people who keep thier homes @ 72 f.It's more like 76-82 f.

I am not attacking BTW.I'm just stating things as I see them Wink

It's a great product & I'm very happy with it Grin

My unit runs @ 760 mh/s consistantly (on the 768 FW,even at 89 degrees room temp Shocked

) & I will at later date try to improve that by changing the grease & maybe an improved HS/fan setup,I'm still thinking Grin

I'm also watching these BFL threads & other FPGA threads for ideas Wink

Exactly. All 10 of mine were absolutely fine with no throttling whatsoever in my 72F office. I have a dedicated window A/C in there to keep things cool, and have it set at 70 (by the time the air is around to the miners, it's probably 72).

I only have 4 left, but have upgraded them all to the 872 MH/s firmware, and still zero throttling.

I think people are trying to expect too much of them out of environments that are hotter than 72F.

Cablez

legendary

Activity: 1400

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I owe my soul to the Bitcoin code...

I'd do it just because its something I'm in to. Can't remember my last aircooled rig. It certainly has potential for performance gains.

cuz0882

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Activity: 392

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Quote from: despoiler on May 24, 2012, 04:59:08 PM

Quote from: Inaba on May 24, 2012, 04:52:11 PM

I bet someone that has a high capacity CNC machine that releases a water block for these would make bank. I wish I knew how to mill.

I thought BFL was already working on one.

I would like to see a decent heatsink on the singles. Water cooling is a little extreme for something like this.

Unacceptable

legendary

Activity: 2212

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These units were designed to run in a commercial temp controlled enviroment @ 72 degrees f.Since they are not being run in such an enviroment,i.e. homes & offices where temp is not a mandatory 72 degrees,we are seeing these "overheat" issues.IMO.Plus the varience on a chip by chip basis as well.

Its was a choice they made when designing these devices.Personally I think it wasn't a good decision.Knowing full well the general public was going eat these up like candy.

I'm an A/C install & service tech & know of very few people who keep thier homes @ 72 f.It's more like 76-82 f.

I am not attacking BTW.I'm just stating things as I see them Wink

It's a great product & I'm very happy with it Grin

My unit runs @ 760 mh/s consistantly (on the 768 FW,even at 89 degrees room temp Shocked

) & I will at later date try to improve that by changing the grease & maybe an improved HS/fan setup,I'm still thinking Grin

I'm also watching these BFL threads & other FPGA threads for ideas Wink

DeathAndTaxes

donator

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Gerald Davis

Quote from: SgtSpike on May 24, 2012, 04:57:15 PM

Quote from: Inaba on May 24, 2012, 04:52:11 PM

I bet someone that has a high capacity CNC machine that releases a water block for these would make bank. I wish I knew how to mill.

If someone designs one, I have access to machines...

BFL alreayd made one. Maybe they will give you the specs. Could be a win - win. Better cooling product would mean the chips can be driven harder = more demand for their chips.

despoiler

member

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Quote from: Inaba on May 24, 2012, 04:52:11 PM

I bet someone that has a high capacity CNC machine that releases a water block for these would make bank. I wish I knew how to mill.

I thought BFL was already working on one.

rjk

sr. member

Activity: 448

Merit: 250

1ngldh

Quote from: Cablez on May 24, 2012, 04:55:53 PM

Considering BFL has already created a waterblock they should start selling those on their site as well. Then we can wait 4 weeks for 2 different items.........I kid I kid! Grin

Their design uses screw mounts that are not available on current-gen boards. The newer-gen boards have a tweaked layout to accommodate the block, so I wonder if it would still be possible to make a block for the current-gen singles.

SgtSpike

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Quote from: Inaba on May 24, 2012, 04:52:11 PM

I bet someone that has a high capacity CNC machine that releases a water block for these would make bank. I wish I knew how to mill.

If someone designs one, I have access to machines...

Cablez

legendary

Activity: 1400

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I owe my soul to the Bitcoin code...

Considering BFL has already created a waterblock they should start selling those on their site as well. Then we can wait 4 weeks for 2 different items.........I kid I kid! Grin

Inaba

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I bet someone that has a high capacity CNC machine that releases a water block for these would make bank. I wish I knew how to mill.

rjk

sr. member

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1ngldh

Quote from: BTCurious on May 24, 2012, 04:29:00 PM

Quote from: rjk on May 24, 2012, 03:50:20 PM

All I'm saying is that you shouldn't compare them. All "the other FPGA manufacturers" are using plastic chips.

I was wondering about that. Isn't the BFL single a plastic chip with a metal plate on top? Because if so, then why use the metal plate at all? Wouldn't it be better to put the heatsink directly on the chips? (Just wondering here, not taking sides)

No, the chip packaging is similar to a CPU, where it is very close to or in contact with the die. The die itself is smaller then the area covered by the heat spreader.

Inaba

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Quote

again, i'm not debating that. If BFL's designers are so good (which again, it seems that they are) that they're running into thermal issues, they should create a solution that actually solves the issue. The box design is not optimized for airflow, the heatsink is not optimized for dissipation, and the sanding was not optimized for heatsink contact, thus creating issues.

I don't disagree that the box design is not optimal in any way and I agree with you other assessments. I was merely pointing out the fact that there are literally no other FPGA vendors doing or have done what BFL has done with these chips. Even disregarding the plastic vs metal issue for a comparison, no other vendor would have run into these problems because they are not pushing the chips to continuous duty as far as bitcoin mining pushes them.

Topic: Butterfly Labs - Bitforce Single and Mini Rig Box - page 19. (Read 186929 times)