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And oddly enough my "dead" Chili is back to life and fully operational. No more 4 LEDs.
Why?
Well, before I was going to add it to my collection I did a complete cleaning of it first with spray on electronics cleaner and a nylon brush, followed by a nice alcohol bath (95% isopropyl). Plugged it in one last time and...
It worked perfectly. Over and over again.
I think the problem is the circuits for the power supply on the side there are susceptible to either resistive or capcitative leakage based on dust and normal stuff. Why people don't conformal coat these things is beyond me. However cleaning it off with Alcohol fixes the problem.
Yes, it's hashing again now. But I will shut it down to mount it. Eventually.
C
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Good morning! Well, Defcon22 is coming up soon in Vegas, and I thought I would host a talk about my experiences with hacking bitcoin miners to make them run faster/cooler/better. And meet people, it's always fun to meet people and talk about hacking things. So I took my chatting and notes from the thread: Hacking BFL Jalapenos https://bitcointalk.org/index.php?topic=336782.0;topicseen, and the Hacking BFL singles thread, and turned it into a presentation called: Hacking Bitcoin Miners for fun, flames, and profit.Unfortunately the talking schedule is full, so they couldn't fit my talk in. Drat. However if there are people interested in hearing how to tweak I'd be more than happy to host a 1 hour discussion during the Con in the Con Suite, break room, etc to chat about Bitcoin. I think it could be fun, and educational. If enough people sign up maybe we can take over a hotel or something. Hardware Hacking-Con! So who is going to Defcon this year, and how shall we all meet up? Who can bring the beer for the bitcoins and whip up invites and logos for the get together? I'll post a summary of my talk here in the next day or so. Also what's the best way to spread the word about this? It's a big community and I'd be interested in meeting you all. See you in Vega$. Lightfoot. |
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Evaporative cooling is cost effective if you're in really dry climate. Or else you have a choice to pay quite a lot more to cool everything with refrigerated cooling ("AC"). You'd need to install a huge capacity system for that many miners.
The other option is to actively ventilate the rooms with very high flow of air from outside. You can calculate how much airflow (or air exchanges) will be needed if you know the heat output of all your miners, the heat capacity of air (google) and your typical outside temperatures.
Actually I realized something: If I put my miners by a window with their exhaust fans pointing out, the room does not get hotter than ambient and they act as nice little exhaust fans. Only heat in the room is from the Corsair power supplies. Likewise my water-cooled units are running with the radiators in the window, fans blowing out. Then a normal window fan is in the opposite side of the house blowing inward to pressurize the room and draw the coolest air from the north side of the house. This has solved my summer heat problems; no AC needed. |
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It could be that manufacturers are doing burn in tests. Big mining operations are ordering to keep ahead of the diff. So it could be a timing thing, 20 PH is ordered, burn in test takes place, miners are shipped and arrive at their destination just before the next diff rise, meanwhile in anticipation of the next, large mining ops order more, more burn in tests, more peaks just before the change.
If you go through the Eligius contrib list, you can see this rising in hash power just before diff changes in most of the medium to larger mining operations.
20PH is alot! I dont think any one manufacturer has that on hand right now to test. Agreed. 20ph would require what, 20 megawatts of power? That's kind of a lot. 1gh=1kw. 1000gh=1ph=1mw. |
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Well, after a long and oddly enough profitable run I finally shut down my Chili. I had to turn it off to move it, and when I powered up it was giving me the four LED salute, which probably means the power supply is sunk.
Ah well, it did a very good job for me. Thanks Mr. Teal!
Chris
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Wow this thread clearly crush "dreamers"  There are enough evidence, everywhere in the world, where people with "Poor" backgrounds, excelled in life, and made it big. Bill Gates started in his garage {Today he is the richest man alive} My neighbor came to our "3rd world" country with only a bag of clothes. 45 years later he pensioned a millionaire, and I am the poor bastard next door, spoiling his view. Ha ha ha. And there are thousands of these examples of poor people making it big. {Those are the good stories, that catch the news, not the wealthy rich boy, who inherit millions} Will the rich get richer, yes they will.. Do poor people, have no change, of making it big? No way. Gates was hardly from a poor background. Yes he made a lot of money, but never, NEVER forget that a good part of that was because he was in the office the day Digital Research was out hang-gliding. When IBM came a-calling he was there. Was that hard work? Sure. Was that also luck? Sure. I remember these guys from the ITS days, and when Gates was writing code for the Model 100. Luck played a bigger part than you might want to acknowledge. And I know plenty of people who founded companies in the 90's dot.com boom and the late 90's Internet boom. Some made a lot of money, then lost it all on their next investment. Because they confused their "luck" with "skill" and "smartz". That said, studies have shown that social mobility in the US is stagnated. It's a lot harder to drop from rich to poor, and a lot harder to move from poor to rich. Easier to fall out of middle class, harder to move from middle-rich. That's not an opinion, that's a simple flat fact. My own story of dropping out of HS to where I am now (quite happy and comfortable) is kind of cool, but it really helped that I was sleeping on the right steam grate when the opportunity arose. I credit my skills, my friendly manner, but I *never* forget that luck played a part, along with my upbringing (son of an AT&T manager in the 70's. Got a lot of cool things to play with as a kid). |
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No, he is off getting I AM HODLING tattooed on his bottom.
C
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great! educating your young ones properly  This has been an excellent teaching experience for all the kids. The concept of money, value and the like can be tough to explain sometimes. My son has been mining with some older miners I gave him, and is HODLing. C |
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I just sodled .08 btc to my kid for $40 (yes, at $500 price we discussed earlier). He wants his money someplace he can HODL!
C
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Best time to plant a tree is 20 years ago. Next best time is now. Try that.
C
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Still holding most of my BTC, been earning some from consulting and spending some on overstock type stuff. So why is BTC blipping up?
C
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Quick answer: No but it is fun. At this point difficulty has caught up, but if you want a kick ass conversation piece you can still buy the chips on ebay and I'll install them.
C
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Single uses about 4 watts per gh at the wall. 3 if you undervolt it with some resistor mods.
The jalapeno used more like 5 watts per gh, six if it was the 2 chip model. This is more due to the hotel load (things like the CPU, power control, USB, etc) using power. My 32gh jally is 5w/gh because the power supply is less efficient than a single and I have to run a Corsair H100 water block system to cool the little guy.
Power matters a *LOT*. I'll probably be throttling down my systems in June.
C
(Why yes, I hack hardware for bitcoin. Tell the Defcon people to accept my presentation and I'll do one at Blackhat/Defcon in August. We might even set things on fire)
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SO what you're describing here is a dollar auction. Heh heh. That's a fuuuun game.
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As long as it doesn't get wet.
Android device in a safe; I fire it up every few months for patches and updates.
C
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Interesting. I have run BFL chips literally till they exploded (blew tops off, yes it requires insanely stupid things), likewise I have run MrT's boards with "poor" coupling to the sink and they seem to defend against this with temp monitoring.
Hm.
C
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I don't think it's *quite* that bad, however this next jump should be my last with the 65nm BFL gear. After this I will power things down for the summer and see if there is an uptick in the fall when I need heat for my room again. :-)
C
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Thanks for pointing out the services forum. I really should post my abilities there as a bitcoin miner repairer or whatnot-er.
At this point I think my reputation is good and my skills are up to date.
C
If you are better in mining then better go to mining section and post your skills and experience hope you have better replies and offers *nod* I run a pair of threads about upgrading Jallies and Singles over there. Debating moving into other types of miners, at this point I'm looking at being able to replace .3mm BGA chips which are much harder than the .5mm ones. |
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