klondike_bar
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Activity: 2128
Merit: 1005
ASIC Wannabe
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October 02, 2013, 07:42:50 PM |
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what is the spacing on the heatsink mount holes of the h-board? It looks like they may be 37.5mm or so width&length
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Micky25
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Activity: 974
Merit: 1000
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October 02, 2013, 09:16:10 PM |
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I'm still totally uncertain if I want to use these guys or not:  http://www.amazon.de/gp/product/B004BU6ITM/I'm scared of heat congestion between the boards getting worse. Just blowing the heat away softly through the naked gaps will help the best I think. |
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klondike_bar
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Activity: 2128
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October 02, 2013, 09:33:13 PM |
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I'm still totally uncertain if I want to use these guys or not: http://www.amazon.de/gp/product/B004BU6ITM/I'm scared of heat congestion between the boards getting worse. Just blowing the heat away softly through the naked gaps will help the best I think. id make sure to use a heatsink less than 10mm tall. 6mm would be better |
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klondike_bar
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Activity: 2128
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ASIC Wannabe
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October 02, 2013, 10:27:25 PM
Last edit: October 02, 2013, 10:38:35 PM by klondike_bar |
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can someone explain the "coreOK" stat better for me? I sometimes see chips with this as 0 or <10, and other times they are all in the hundreds.
When i start the miner, all chips report 756. within 5 minutes they are all under 700
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Keefe
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October 07, 2013, 07:32:28 AM |
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can someone explain the "coreOK" stat better for me? I sometimes see chips with this as 0 or <10, and other times they are all in the hundreds.
When i start the miner, all chips report 756. within 5 minutes they are all under 700
Each chip has 756 cores. The software tracks which cores have found good nonces. You can see the full details in /tmp/.core.log The numbers you're looking at are actually how many cores have *not* yet found a good nonce. Over time, if all cores are good, that number will approach 0. |
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klondike_bar
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Activity: 2128
Merit: 1005
ASIC Wannabe
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October 07, 2013, 05:58:56 PM |
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can someone explain the "coreOK" stat better for me? I sometimes see chips with this as 0 or <10, and other times they are all in the hundreds.
When i start the miner, all chips report 756. within 5 minutes they are all under 700
Each chip has 756 cores. The software tracks which cores have found good nonces. You can see the full details in /tmp/.core.log The numbers you're looking at are actually how many cores have *not* yet found a good nonce. Over time, if all cores are good, that number will approach 0. oh terrific, thanks. I was getting concerned to see some chips hitting '0' for this, and letting the crazy in my head associate it with temporary hashrate drops at the pool or chips switching off to 0 noncerates. -> The chips turning off was fixed by a few more voltage tweaks - 0.825V across the caps seems to be the best, with tuning at 54 on 15 chips, and chip 1 at 53, I have a stable 38-42GH/s hourly rate (24hr average of ~39.85 GH/s). At 0.840V i was getting about 41.5GH/s, but a chip turning off now and then bringing me down to 39GH. Not sure if this was a temp or voltage issue, but ive got some bigger 35x35x6mm heatsinks coming that i plan to strap 4 of on each board |
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zurg
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October 08, 2013, 11:10:08 AM |
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Great, woke up to 0Gh/s.... Drove to work (when I was off), yeah my luck. My Pi was showing:  Had to hard reset. These things require so much babysitting it aint funny anymore/ |
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klondike_bar
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October 08, 2013, 12:06:23 PM |
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Had to hard reset.
These things require so much babysitting it aint funny anymore/
I thought that, but then i backed off a bit on the tickering and let it do its thing. After about 6hrs to fully warm up and reach peak voltage, Ive been stable for 48hrs at 39.9GH/s average (+/- 2GH on the hourly reading) |
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juhakall
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October 08, 2013, 03:24:30 PM |
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I've been running the bitfury branch of BFGMiner for about a week now, with no major problems. Performance is identical to chainminer (30G + 30G + 35G accepted hashrate from 3 boards), but sometimes the hashrate (and power consumption) randomly drops 1%. This is fixed by restarting. I have no reason to use chainminer anymore, except to maybe fine-tune new boards as they come in.
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I'm currently developing an experimental social AI platform
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eneloop
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Activity: 1513
Merit: 1040
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October 08, 2013, 04:05:09 PM |
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is there a way to get longer sampls than 5 minutes? would be fine for tuning.
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Micky25
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Activity: 974
Merit: 1000
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October 08, 2013, 08:43:43 PM |
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poser!  |
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-Redacted-
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October 09, 2013, 02:18:05 AM |
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Nice Spotts version 1 case there.... Thanks for the photo! Might try turning down the humidity some - there's stuff that looks kind of like like mold growing out of the tops of all your chips.... Here's one of my plain-jane Bitfury rigs. No heatsinks, nothing much but a little USB fan blowing on the h-boards. Been running for weeks now, like a Duracell Bunny.   |
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GandalfG
Sr. Member
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Activity: 259
Merit: 250
Dig your freedom
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October 09, 2013, 05:56:01 PM |
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Nice Spotts version 1 case there.... Thanks for the photo! Might try turning down the humidity some - there's stuff that looks kind of like like mold growing out of the tops of all your chips.... Here's one of my plain-jane Bitfury rigs. No heatsinks, nothing much but a little USB fan blowing on the h-boards. Been running for weeks now, like a Duracell Bunny. The KNC Jupiter under serves only as a stand right?  |
Want to say thanks? 16ragydppe9QFRVhrdwEUjgfMS7KCfEFGY
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-Redacted-
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October 09, 2013, 06:15:35 PM |
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Nothing to see there - it's a, umm, like you said - a fancy stand - just a case with some fans on it. Yeah. Nothing important to see there - just ignore that part....
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jlsminingcorp
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October 09, 2013, 06:38:08 PM |
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Nothing to see there - it's a, umm, like you said - a fancy stand - just a case with some fans on it. Yeah. Nothing important to see there - just ignore that part....
It does look smart though, this unimportant table-top ornament, very shiny. Has yours caught fire yet  ? |
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-Redacted-
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October 09, 2013, 06:47:25 PM
Last edit: October 09, 2013, 07:01:25 PM by -Redacted- |
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No, and it's put out a solid 580-600 Gh/s over the last 12 hours. Guess mine wasn't one of the .001% that had bad caps. At least it hasn't burned up any Rasperry PI's like one of my m-boards did. That DID go up in smoke and burn...
But - ignore that thing on the bottom, it's just an, umm, 800 watt ceramic space heater I use to keep my apartment warm....
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GandalfG
Sr. Member
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Activity: 259
Merit: 250
Dig your freedom
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October 09, 2013, 06:55:36 PM |
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No, and it's put out a solid 580-600 Gh/s over the last 12 hours. Guess mine wasn't one of the .001% that had bad caps. At least it hasn't burned any Rasperry PI's like one of my m-boards did. That DID go up in smoke and burn....
But - ignore that thing on the bottom, it's just a, umm, ceramic heater I use to keep my apartment warm....
Nice, low noise ceramic heater lol About burned ceramic caps. I'm not sure, but I think they burn only those that are not in the air stream. I need good quality pictures, but it seems to me that the corner capacitors are not the best soldered. What also may be the cause. |
Want to say thanks? 16ragydppe9QFRVhrdwEUjgfMS7KCfEFGY
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jlsminingcorp
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October 09, 2013, 08:16:16 PM |
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No, and it's put out a solid 580-600 Gh/s over the last 12 hours. Guess mine wasn't one of the .001% that had bad caps. At least it hasn't burned up any Rasperry PI's like one of my m-boards did. That DID go up in smoke and burn...
But - ignore that thing on the bottom, it's just an, umm, 800 watt ceramic space heater I use to keep my apartment warm....
Sorry -Redacted-, just a joke, no offence meant. It looks like good kit, whatever it is. |
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GandalfG
Sr. Member
Offline
Activity: 259
Merit: 250
Dig your freedom
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October 09, 2013, 08:32:54 PM |
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I imagined Redacted post with a photo of Jupiter from which smoke rises and signature "Something went terribly wrong"
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Want to say thanks? 16ragydppe9QFRVhrdwEUjgfMS7KCfEFGY
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