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Author Topic: Swedish ASIC miner company kncminer.com  (Read 3039437 times)
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October 07, 2013, 11:13:57 AM
 #13441

I dont think replacing those artic cooler fans is going to do anything for preventing those caps or VRMs from burning out. Maybe adding or reorienting case fans may help if those components are overheating (are they?)
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October 07, 2013, 11:16:35 AM
 #13442

I dont think replacing those artic cooler fans is going to do anything for preventing those caps or VRMs from burning out. Maybe adding or reorienting case fans may help if those components are overheating (are they?)
I was thinking to replace them by some BitFenix Spectre PRO PWM 140 mm : http://www.bitfenix.com/global/en/products/accessories/spectre-pro-pwm#specs
Air Flow (CFM)    122.2 CFM
Noise (dB-A)    29.2 dB(A)

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October 07, 2013, 11:22:50 AM
 #13443

My point is that the asics themselves may be adequately cooled, so upgrading those fans wont help. But the VRMs may be overheating. On 5870 videocards it was also a lot more tricky to keep VRM temps under control than the GPU itself. Pointing a fan on them or gluing some heatsinks on them may help.

ANyway, that is if this is a heat problem, it could be overcurrent too. Can someone with a KNC measure the temperatures of those VRMs? Or carefully feel with your finger?
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October 07, 2013, 11:22:54 AM
 #13444

Heat rises. For those who plan to keep the lid on, perhaps tilt the end of the miner up 20 degrees and allow the heat to rise and flow out the back more naturually.

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October 07, 2013, 11:24:06 AM
 #13445

I'm wondering. Assuming you add/change fans ..then your rig fries or otherwise breaks. Won't you have invalidated the warranty ?



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carlo
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October 07, 2013, 11:24:51 AM
 #13446

I dont think replacing those artic cooler fans is going to do anything for preventing those caps or VRMs from burning out. Maybe adding or reorienting case fans may help if those components are overheating (are they?)
I was thinking to replace them by some BitFenix Spectre PRO PWM 140 mm : http://www.bitfenix.com/global/en/products/accessories/spectre-pro-pwm#specs
Air Flow (CFM)    122.2 CFM
Noise (dB-A)    29.2 dB(A)
Maybe this one:
Yate Loon D14SH-12, 140x140x25mm, 2800rpm, 237.8m³/h, 48.5dB(A)
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October 07, 2013, 11:27:47 AM
 #13447

Heat rises. For those who plan to keep the lid on, perhaps tilt the end of the miner up 20 degrees and allow the heat to rise and flow out the back more naturually.

Air moves where you push it. It's better to keep the lid for the coordinated airflow.

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October 07, 2013, 11:32:27 AM
 #13448

I'm wondering. Assuming you add/change fans ..then your rig fries or otherwise breaks. Won't you have invalidated the warranty ?

At this time with the default fans and the case lid on. Almost no air moves out the back.

I could not even put out a candle with the lack of air movement.

I would not run these units with that level of ventilation. I use the Avalon type fans to move the air on my Bitfury Kit setup as well.

Also consider that my ambient temp is under 63 degrees fahrenheit.

The only cooling that is happening at this time from what I can see is the processor itself. Everything else is just sitting in hot air.

If I had to contend with any ambient temp over 75 degrees fahrenheit, then I would expect these units to fail.

P.S. I have upgraded the firmware from v0.92 to v0.93
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October 07, 2013, 11:40:24 AM
 #13449

I'm wondering. Assuming you add/change fans ..then your rig fries or otherwise breaks. Won't you have invalidated the warranty ?

At this time with the default fans and the case lid on. Almost no air moves out the back.

I could not even put out a candle with the lack of air movement.

I would not run these units with that level of ventilation. I use the Avalon type fans to move the air on my Bitfury Kit setup as well.

Also consider that my ambient temp is under 63 degrees fahrenheit.

The only cooling that is happening at this time from what I can see is the processor itself. Everything else is just sitting in hot air.

If I had to contend with any ambient temp over 75 degrees fahrenheit, then I would expect these units to fail.

P.S. I have upgraded the firmware from v0.92 to v0.93

how's it liking the updated firmware?

anyone have actual temp. readings??
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October 07, 2013, 11:43:05 AM
 #13450

Heat rises. For those who plan to keep the lid on, perhaps tilt the end of the miner up 20 degrees and allow the heat to rise and flow out the back more naturually.

Air moves where you push it. It's better to keep the lid for the coordinated airflow.

*If* some thought went into airflow routing.  In this case, the exhaust from the front pair of coolers gets fed directly into the rear pair.  Taking the cover off helps.
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October 07, 2013, 11:45:18 AM
 #13451

Heat rises. For those who plan to keep the lid on, perhaps tilt the end of the miner up 20 degrees and allow the heat to rise and flow out the back more naturually.

Air moves where you push it. It's better to keep the lid for the coordinated airflow.

*If* some thought went into airflow routing.  In this case, the exhaust from the front pair of coolers gets fed directly into the rear pair.  Taking the cover off helps.

so by this theory, saturns should inherently run cooler, right???
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October 07, 2013, 11:49:25 AM
 #13452

My point is that the asics themselves may be adequately cooled, so upgrading those fans wont help. But the VRMs may be overheating. On 5870 videocards it was also a lot more tricky to keep VRM temps under control than the GPU itself. Pointing a fan on them or gluing some heatsinks on them may help.

ANyway, that is if this is a heat problem, it could be overcurrent too. Can someone with a KNC measure the temperatures of those VRMs? Or carefully feel with your finger?

I touched them by finger, they are hot, more like 60c-70c degree or so, but that is when the case is open and in the room, now case is closed and moved to the outside, should be better at 16c degree outside

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October 07, 2013, 11:51:50 AM
 #13453

60C sounds quite good to me. Most of those VRMs should have no problem operating at 100C and more.
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October 07, 2013, 11:53:25 AM
 #13454

Heat rises. For those who plan to keep the lid on, perhaps tilt the end of the miner up 20 degrees and allow the heat to rise and flow out the back more naturually.

Air moves where you push it. It's better to keep the lid for the coordinated airflow.

*If* some thought went into airflow routing.  In this case, the exhaust from the front pair of coolers gets fed directly into the rear pair.  Taking the cover off helps.

so by this theory, saturns should inherently run cooler, right???


The fewer ASIC boards per case, the cooler Smiley
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October 07, 2013, 11:55:55 AM
 #13455

Those VRMs made loud high pitch sound when first running at 0.9 firmware (and consumes considerably higher power), and after upgrading to new firmware, those sound disappeared. I doubt that those burned boards were running 0.9 firmware

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October 07, 2013, 12:00:27 PM
 #13456

Those VRMs made loud high pitch sound when first running at 0.9 firmware (and consumes considerably higher power), and after upgrading to new firmware, those sound disappeared. I doubt that those burned boards were running 0.9 firmware

Both burned boards were 0.92.

Nice to see bitcointalk back up!

Horrible timing for the downtime.
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October 07, 2013, 12:12:00 PM
 #13457

Those VRMs made loud high pitch sound when first running at 0.9 firmware (and consumes considerably higher power), and after upgrading to new firmware, those sound disappeared. I doubt that those burned boards were running 0.9 firmware

Both burned boards were 0.92.

yeah I can confirm that users that experienced said they where using 0.92 (over kncminer channel @freeenode)
but someone else said that those units could be damaged by having use 0.90 for a few hours / day, it's only speculation thou.

Nice to see bitcointalk back up!
Horrible timing for the downtime.

agreed on both points

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October 07, 2013, 12:16:05 PM
 #13458

Anyone with day2 shipping seen a sign of their orders in production yet?
And anyone here with confirmed hashing on wallet address given for hosting?

I have a June 4 order, paid June 5, supposed day 2 delivery, but still "paid". Order # in high 800's...
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October 07, 2013, 12:24:52 PM
 #13459

Anyone with day2 shipping seen a sign of their orders in production yet?
And anyone here with confirmed hashing on wallet address given for hosting?

I have a June 4 order, paid June 5, supposed day 2 delivery, but still "paid". Order # in high 800's...

There are people in 20xx range with status "in progress" - I would start to worry in your case

edit: http://forum.kncminer.com/forum/off-topic/miners-cafe/5386-shipping-log

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October 07, 2013, 12:27:55 PM
 #13460

Anyone with day2 shipping seen a sign of their orders in production yet?
And anyone here with confirmed hashing on wallet address given for hosting?

I have a June 4 order, paid June 5, supposed day 2 delivery, but still "paid". Order # in high 800's...

My day 2 order #82 went to "in progress" friday afternoon. called them about an hour ago. they said it would probably be built today, since she could see that my order was pretty high up on the list. and it wasnt in the local pick up batch they got over the weekend.
they started assembling day 2 orders today or yesterday i think.
a couple of guys on the irc channel just got an email about 30 minutes ago, saying they could pick up theirs localy today, they must have been in the weekend batch, not sure if they were day 1 or 2 though.

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