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peterepeat (OP)
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June 25, 2013, 11:32:12 PM |
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Aren't you worried about a layer of frozen water condensing on the electronics?
Not really - I only chill it for 10 minutes in the freezer. I guess it gets the PCB to around 5 to 10 °C. Also its winter here at the moment so I will worry about condensation issues later on. the ideal temperature seems to be between 5 and 10 °C I tried it again this morning and chilled them for about 10 minutes only in the freezer, then run in ambient temperature of about 18°C They have been running for about 2 hours now - the 7.75 is actually stable now at 7.98GH/s, the other one is still stable at 7.62GH/s http://imgur.com/CgQ3YITso now its actually a 960MH/s bonus - just like getting 3 ASICMiner USB for free  (disclaimer - this may have other consequences so research first, and consider your ambient environment) |
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"The nature of Bitcoin is such that once version 0.1 was released, the
core design was set in stone for the rest of its lifetime." -- Satoshi
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GalaxyASIC
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June 26, 2013, 12:01:03 AM |
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While working on better cooling solution for my own ASIC, that is still months away, I put together a rig that can keep hashers very cold and keep moisture in the air away from electronics, so condensation is no a problem. This could be applied to BFL miners and I have four of my own 60GH units on order for 4-5 month now, but have to wait till BFL gets up to speed. Buying a 5Gh unit from someone who has it on hand for 15X it's price seems too much since I get my own relatively soon. But I want to test the cooling solution that I have developed.
I have to see if cost of cooling them makes a good business for hosting other people's units, but for now I just want to test how well it works and need a loaner units for about two weeks and I will fully reimburse hashing loses and pay for overnight Fedex shipping both ways. I am in New York city.
You can still mine on your own account from my lab, I just want to see how well it could be cooled. Upside? you get faster hashing unit and make more BTC.
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HashFast REFUND ! I am a HashFast's Batch 1 customer and I want full 100% BTC refund.
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xgtele
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June 26, 2013, 07:17:28 PM |
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No Frost fridge is seems fine for your Jallies  |
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peterepeat (OP)
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July 03, 2013, 09:17:10 AM |
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Aren't you worried about a layer of frozen water condensing on the electronics?
Not really - I only chill it for 10 minutes in the freezer. I guess it gets the PCB to around 5 to 10 °C. Also its winter here at the moment so I will worry about condensation issues later on. the ideal temperature seems to be between 5 and 10 °C I tried it again this morning and chilled them for about 10 minutes only in the freezer, then run in ambient temperature of about 18°C They have been running for about 2 hours now - the 7.75 is actually stable now at 7.98GH/s, the other one is still stable at 7.62GH/s http://imgur.com/CgQ3YITso now its actually a 960MH/s bonus - just like getting 3 ASICMiner USB for free (disclaimer - this may have other consequences so research first, and consider your ambient environment) Just to expand on this, I have now flashed my Jalapenos with the BFL released BitforceSC 1.2.5 firmware and found the 10 minute chill to still be effective. New speeds: 7.98 improved to 8.18 and 7.62 is now 8.11 so now is 16.29 total hash rate with the pre-chill and new firmware (was around 16.0 without the pre-chill) |
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peterepeat (OP)
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July 03, 2013, 11:16:09 AM |
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thanks - I havent tried that one yet. I did try setting #define __ASIC_FREQUENCY_ACTUAL_INDEX 8 and flashed that, however I was getting 1000s of errors so I went back http://imgur.com/peKactI |
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philips
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July 03, 2013, 11:25:17 AM |
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Worth trying. His modifications consists in relaxing the start-up tests. Just comment out these lines in ASIC_Engine.c if (iReadBackNonceCount < 4)
{
// This engine is DEAD!
bWasAnyEngineDecommissioned = TRUE;
DECOMMISSION_PROCESSOR(cDiagChip, cDiagEngine);
}
Then it won't decommission any engines regardless. My firmware was slightly more conservative and made sure the engine returned at least one valid nonce. |
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peterepeat (OP)
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July 03, 2013, 11:41:41 AM |
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Worth trying. His modifications consists in relaxing the start-up tests. Just comment out these lines in ASIC_Engine.c if (iReadBackNonceCount < 4)
{
// This engine is DEAD!
bWasAnyEngineDecommissioned = TRUE;
DECOMMISSION_PROCESSOR(cDiagChip, cDiagEngine);
}
Then it won't decommission any engines regardless. My firmware was slightly more conservative and made sure the engine returned at least one valid nonce. I will give this a go (just need to get the AVR dragon back - its away for a week or so) |
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TheSwede75
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July 03, 2013, 03:21:19 PM |
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Someone should just try throwing their Jalapeno in a deep-freezer and mining @ -20C. I am serious, I want to see results |
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rustyh17
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July 03, 2013, 05:08:36 PM |
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Someone should just try throwing their Jalapeno in a deep-freezer and mining @ -20C. I am serious, I want to see results Just spray on a little bit of this: http://www.neverwet.com/videos-news.php#Click on the CONFORMAL COATINGS video link.... |
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Gomeler
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July 03, 2013, 09:34:21 PM |
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Someone should just try throwing their Jalapeno in a deep-freezer and mining @ -20C. I am serious, I want to see results If I had one I would. I did all sorts of refrigeration cooling things when I was overclocking CPUs and GPUs with the culmination of a failed 3 stage cascade. If the jalapeno had software voltage control it could really open up some interesting testing. I'd prefer though a single chip PCB like the test PCBs that were used for Bitfury testing. Could be fun seeing how the chips perform down at -100 Celsius |
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peterepeat (OP)
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July 03, 2013, 10:26:58 PM |
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Update - the slower unit after 24h is back to 7.9 GH. I tried chill technique and no improvement. Back to firmware tweaking again  |
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bitpop
Legendary
 Offline
Activity: 2912
Merit: 1060
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July 04, 2013, 11:24:26 AM |
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What software is that picture? thanks - I havent tried that one yet. I did try setting #define __ASIC_FREQUENCY_ACTUAL_INDEX 8 and flashed that, however I was getting 1000s of errors so I went back http://imgur.com/peKactI |
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peterepeat (OP)
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July 07, 2013, 10:21:24 PM |
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What software is that picture? thanks - I havent tried that one yet. I did try setting #define __ASIC_FREQUENCY_ACTUAL_INDEX 8 and flashed that, however I was getting 1000s of errors so I went back http://imgur.com/peKactIIt's cgwatcher, a miner supervisor app. |
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