@Sitarow any news, did you replace the front fans with the avalon type you mentioned before?
Since I had upgraded to v0.93 from v0.92 Yesterday, I have chosen to do a baseline on performance prior to swapping out the fans and putting the case cover back on. Once 0.94 is released I will be swapping out the fans as I am sure it will be a far more solid build. fair I hope to be receiving my last shipment of hardware some time this week. So in order for me to be ready I need these issues all ironed out with a solid solution going forward.
The cooling with just a single fan pointing downwards with the case open has proven that performance does increase over the default factory cooling methods.
you're talking about this configuration, right?:  I seem to rembember that DeadTerra on irc today was saying something about problem he had with this PSU and that he was heading to KnC office with a faulty one to make them evaluate it. Yes that is the correct setup I can make it more elaborate but something simple that anyone can use is what I try to go for. Here is the results after 5+ hr operation with no cgminer restarts. It presently is running on firmware v0.9.3. It seems both v0.9.2 and v0.9.3 give the same performance results with these simple steps. Note: That the Bitfury 400GH/s unit was down to make room for the next KnCMiner shipment. Once it gets here.   |
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@Sitarow any news, did you replace the front fans with the avalon type you mentioned before?
Since I had upgraded to v0.93 from v0.92 Yesterday, I have chosen to do a baseline on performance prior to swapping out the fans and putting the case cover back on. Once 0.94 is released I will be swapping out the fans as I am sure it will be a far more solid build. I hope to be receiving my last shipment of hardware some time this week. So in order for me to be ready I need these issues all ironed out with a solid solution going forward. The cooling with just a single fan pointing downwards with the case open has proven that performance does increase over the default factory cooling methods. Resulst from Firmware 0.9.3  Power Supply for next units.  |
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Yes due to the lack of air movement the case under the unit and in the back of the unit near the rear vents does get warm to the touch. Considering its aluminum thats not something to overlook. And like I had mentioned this unit is located in a room with an average ambient temp between 60 and 65 degrees fahrenheit.
I would also add that as I have posted on the first page, the simple steps taken has helped with performance.
Can you point to the source of where replacing fans will void warranty? Especially if those new fans are powered from an external power source?
If the unit fails because you modified the cooling system, then it's pretty obvious who is at fault! How about you contact the manufacturer and tell them you are concerned about the cooling and ask them for the warranty details at the same time. Well that is the risk you take on a personal level. However given my level of technical experience and background with other ASIC hardware. KnCMiner would know better then dispute any warranty claims made by me. Adding adequate cooling over and above what was given from the factory would not be the cause of overheating components. Especially if like me you have access to tools that make it crystal clear of potential issues with thermal airflow and heat. Edit: I wanted to include the instructions from KnCMiner on how to troubleshoot your unit for potential defective module. To verify if an ASIC board is broken or the performance drop is due to software issues please follow these steps:
1. Turn off and disconnect your PSU.
2. Open your miner case.
3. Unplug the flat ribben cable connecting one of the ASIC Boards (the circuit board that has the big fan on it) to the controller board.
4. Unplug the PCI-Express power cable from the ASIC board.
5. Ensure all other cables are connected properly.
6. Reconnect the PSU and power on the miner. Let the miner work for an hour to asses performance.
If the miner is now performing as expected you should install the 0.9.4 firmware.
7. Turn off the power and disconnect the PSU, reconnect all the PCI-E and ribben cables.
8. Restart the miner and install firmware 0.9.4.source https://www.kncminer.com/pages/support |
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does anyone try to put at chip
thermal tape with 17wk/m
for better solution?
The standard cooling is fine, why void your warranty with that kind of meddling? As far as cpu cooling, I think it is adequate. However the only short fall was on moving air in and out of the case. Is the case actually getting hot? If not then you are wasting your time spending money on fans and blowing your warranty. Yes due to the lack of air movement the case under the unit and in the back of the unit near the rear vents does get warm to the touch. Considering its aluminum thats not something to overlook. And like I had mentioned this unit is located in a room with an average ambient temp between 60 and 65 degrees fahrenheit. I would also add that as I have posted on the first page, the simple steps taken has helped with performance. Can you point to the source of where replacing fans will void warranty? Especially if those new fans are powered from an external power source? |
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does anyone try to put at chip
thermal tape with 17wk/m
for better solution?
The standard cooling is fine, why void your warranty with that kind of meddling? As far as cpu cooling, I think it is adequate. However the only short fall was on moving air in and out of the case. |
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Hi Orama,
nice to hear from you and appreciate your trip report.
Nevertheless the fire-happenings i think you are making yourself a little to comfortable here.
There definetly IS an issue with hardware/software that has to be sorted out by KNC.
I haven't been in the loop. Don't the latest firmwares fix everything? Does the hashing just periodically stop? The popped caps happend with 0.92 , 0.92 and 0.93 fw. So nothing is sorted out here. I am presently running 0.93 on my unit. I notice that I am getting better performance if I can ventilate the air out of the case. The primary reason I feel that this works is that the board components themselves are sitting in stagnant heat with the default CFM fans. I will keep my first impressions post active with the results over the next few days. You can follow it at the link below if you wish. https://bitcointalk.org/index.php?topic=306969.0 |
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I bought a 4th module for my Batch #2 Avalon yesterday. I have a DHL tracking number at this time.
how did you manage that? Edit: Never mind  its on their site 4.2BTC ? hmmm. |
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I have a Corsair Gaming Series 2013 Edition GS 800W ATX/EPS 80 PLUS Bronze Power Supply Unit, is it any good for the Juniper? Also I am thinking of getting
LEPA G1600-MA-EU, so I can plug two together. Also I am considering getting Corsair HX850 Professional Series HX 850W ATX/EPS Modular 80 PLUS Gold PSU. Is this one any good?
ps: I purchased 2 Juniper, the GS 800W is currently connected to an ASICMiner Blade.
If its an old ps from your gpu mining days then it may be worth considering. However I recommend what I use. AX860i http://www.corsair.com/en/ax860i-digital-atx-power-supply-860-watt-80-plus-platinum-certified-fully-modular-psu.htmlI have used it with Avalons and will continue to use them as long as the power requirements are in their operating spec range. Ok, I might get your one, but it is more expensive than all the one I listed. I realize that and saving capital is always a good call. However out the Power Supply models I own, this one and the OCZ1250 I have found gave me the best results overall. |
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I have a Corsair Gaming Series 2013 Edition GS 800W ATX/EPS 80 PLUS Bronze Power Supply Unit, is it any good for the Juniper? Also I am thinking of getting
LEPA G1600-MA-EU, so I can plug two together. Also I am considering getting Corsair HX850 Professional Series HX 850W ATX/EPS Modular 80 PLUS Gold PSU. Is this one any good?
ps: I purchased 2 Juniper, the GS 800W is currently connected to an ASICMiner Blade.
If its an old ps from your gpu mining days then it may be worth considering. However I recommend what I use. AX860i http://www.corsair.com/en/ax860i-digital-atx-power-supply-860-watt-80-plus-platinum-certified-fully-modular-psu.htmlI have used it with Avalons and will continue to use them as long as the power requirements are in their operating spec range. |
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many thanks edit: seems you seem very knowledgeable HW-wise I ask you one last thing  I have a v850 cooler master for my jup. it comes only with 3 pci-e wire connectors even if the PSU has more than 3 pci-e plugs. then I used one of them to power two ASIC core. is it correct or i'm actually under power 2 out of 4 cores in my jup ? it depends if those cords are on Single 12V rail or multiple 12V rails. You want a power supply that gives a single 12V rail power feed. If this is your power supply then it has a single rail. http://www.coolermaster-usa.com/product.php?product_id=10042However it comes with 6 PCI-e 6+2 pin connectors. So based on your question I do not think it is the correct one. What is the model number of your powersupply and I may be able to answer that more accurately. I confirm my PSU is cooler master v850. it has 6 pci-e plug but in the packaging I've only found 3 PCI-e cables. Since that is a single rail type power supply then the only risk I can see happening is that you melt the molex connectors. However if you update the firmware from stock then you should be fine. |
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So.... how well does it blow up?
Seems rather stable atm You're in luck then. Others were.... more unfortune.   thats old news However is one reason for my concern about the lack of proper air movement in and out of the case. Hard to say what their ambient temps were. What type of power supply they had. And even what type of circuits they were running on. P.S. Consider adding width=300 in between the img brackets in order to make the photos show smaller. You can always open the image in a new tab to see it in its full resolution glory. [img width=300] |
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many thanks edit: seems you seem very knowledgeable HW-wise I ask you one last thing I have a v850 cooler master for my jup. it comes only with 3 pci-e wire connectors even if the PSU has more than 3 pci-e plugs. then I used one of them to power two ASIC core. is it correct or i'm actually under power 2 out of 4 cores in my jup ? it depends if those cords are on Single 12V rail or multiple 12V rails. You want a power supply that gives a single 12V rail power feed. If this is your power supply then it has a single rail. http://www.coolermaster-usa.com/product.php?product_id=10042However it comes with 6 PCI-e 6+2 pin connectors. So based on your question I do not think it is the correct one. What is the model number of your powersupply and I may be able to answer that more accurately. |
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So.... how well does it blow up?
Seems rather stable atm  |
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Two things I noticed:
1. The miner does not support multiple pools by default, so you have to manually edit the /config/cgminer.conf and add 2-3 extra pools, I also added a line:
"failover-only" : true,
2. The miner does not have cron service installed, they rely on a service "monitordcdc" to frequently check the current for 8 VRMs on each board, if the current is too low they will restart the cgminer process. I'm not sure of the effectiveness of this approach, but my miner has been restarted by this service this morning
johnyj can you provide simple steps on how we can add "failover-only" pools to our cgminer.conf that would be a great help for those who are not familiar with linux. |
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Can you clarify how these work as far as:
1) do they need to be connected to a computer, or do you merely access thru an ip address?
2) do you need your own power supply? (I have two decent ones I can use already.)
I have a somewhat early order, but figured I would figure this stuff out once I got it. :-D
Just unbox plug in ethernet cord and power cord to your power supply that you provide. Make sure to connect 4 PCIE cables that go to the Asic Units, and the standard molex cable to the controller board. I recommend the corsair AX860i If you had provided your info to KnCMiner under your account page then you should up and mining as long as you have power and internet Use google chrome to connect to the web admin page. In the admin page you can enable ssh and update the system to v0.93. Edit: Forgot to include the fact that you do need to provide your own power supply. |
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Quick question can you post an image of it looks like with the lid on? Or doesn't it have a lid?
Here is a good album that you can check out. It was posted by Xialla http://imgur.com/a/hwZmh#9 |
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I notice your main board did not include the extra slots for expansion. here is yours  here is mine  |
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Thats a good permanent solution. Thank you for the link. I will first try and see if it helps before going full custom. |
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This is only a result of the firmware upgrade  And that 15% hardware error rate is scaring  Here is an update with comparable results from original firmware and airflow to the new Setup and Firmware v0.93.   So far no cgminer restarts. This is results with still open case and single fan placed on top of unit facing down to dissipate heat off the boards. |
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