Note: Just a warning, this is my total noob amateur opinion. If I'm wrong, could you please point out where and why so I can learn  . ------------ Something that's crossed my mind is a possible weak point with Bitcoin. If for whatever reason, governments or other powerful institutions wanted to see Bitcoin fail, all they'd need to do is strong arm ICANN to take down the bitcoin.org domain name (just like they did with Wikileaks). Then there would be massive disruption to the system. Even if a myriad of mirror sites sprang up, how could the ordinary user know which was legit or not? Especially when downloading the Bitcoin client, anybody could put up a mirror site with some malware infected files. I guess what I'm getting at is, is there any plan in place for this type of eventuality? Cheers, Crobbo The only weak point here is between your legs. Settle down. |
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Also what kind of power supply do you have? Have you run this system on Windows? As in you know all the hardware works fine and it's a BAMT issue. Positive the hardware is fine, it worked in win7. I have a 1200w PSU. Try one card. Clock it at 900 core. Can you get into X? Will it mine? |
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I have a bunch of machines, a mixture of 5770s, 5830s, 5870s, 6870s and 6950s. Basically, I wanted to see first hand what these cards had to offer in terms of price, kw/h, and mh/s.
Two (out of five) of my 6870s lock up almost every day. I have scripts running that keep their temps set to 72C max. Similarly, they never run more than 97% of max core clock (970/1000) or mem cock (1212/1250).
They seem perfectly happy running like this for hours and hours. But for reasons I can't seem to pin down, they lock up. I've taken to setting them to even lower params at night (peak temp of 69C and max clock of 90%. That seems to work. But I don't like leaving them set that low all day long. They're not working to their fullest potential then.
Is there something up with the 6870s? I'm not very happy with the cards to be honest. I hate it when they freeze up and I can't get home to restart them. The lockup is of such a nature that the entire machine locks up. Can't ssh. Cron doesn't reboot the machine either.
Upon manual restart, however, the cards are fine once again for hours and hours.
I guess I need to start dialing back to 96% down through to 90% and see where the happy "high" medium is. But the odd things is, it's only two of my cards out of five. The other three sit in adjacent locations on my server shelf. So why do these two lock up so much and not the others. The machines are also identical in every other way.
Either way, a big -1 for the 6870s here.
Run them at 950/330. You should have no problems now. |
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Much of bitcoin safety relies on its distributed nature, and in particular
on the fact that the same code runs everywhere, implementing the
same pre-agreed-upon protocol to reaches a distributed agreement
on the state of the blockchain and what constitutes a valid block.
What this means is that to significantly change bitcoin (for example
changing how many BTC get created by each new block, or removing
the 21M limit, etc ...), all you have to do is change the bitcoin code
and wait a while until it percolates out to all the clients (or actually,
to more than 50% of them).
How hard would that be in practice, I wonder ?
In my opinion, if you are a government, not that hard. The code is in
fact "controlled" by a rather small-ish group of individuals. Influencing
this small group (especially once the incentives get large enough) to get
them to change the code of the official client in a certain way is likely
going to be a walk in the park for someone the size of a government.
Once the source code of the official client has been changed in a
significant and potentially incompatible way, how long will it take
for the new implementation to "win" out there ?
Another way to think about this: how will bitcoin manage "forks" in the
client code ? What if someone successfully manages to fragment the
bitcoin community into multiple implementations ?
Yet another way to think about this: how does one enforces the "integrity"
of the source code and the folks who have sway over it ?
Thoughts ?
If there is truly a need and desire for a virtual peer to peer currency, one will always exist in some form. The code is out there, the methods are out there, anyone can now create their own currency. It's like saying that if you shut down the pirate bay after their first year it would have stopped all the torrent sites. Maybe you could kill Bitcoin. What about Namecoin? Smartcoin? The next 10 currencies that try to fill the place of Bitcoin? Virtual peer to peer currency is here, and it's unlikely to go away. And what government? All of them? *lol* Good luck with that. Has the US govt ever shut something down? I still have friends playing poker. Buying drugs. Downloading torrents. Browsing wikileaks. Is there something out there on the internet the govt has actually stopped people from doing? Relax dude, we're fine. |
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So finally had time to get my mining rig fixed up (mobo fried, RMAed it, been busy with work and such) and I've got this kind of working.... weird issue going on though.
I get through bios/can select what to boot into through the BAMT screen, then it does it's loading stuff.... and then no more monitor! None of the graphics cards (5 5830s) display anything if I plug them in. I am able to SSH into the machine just fine.
I had similar issues with 5830s and Linux. Nothing would appear on the monitor (from any video card) until it finished booting into X. Not exactly sure why, but it did show up eventually. I'm pretty sure the problem is your overclocking. Most of my 5830s (I have 15) are not stable at 970. In windows with Trixx where I can bump up the voltage a little they are stable at 970. But at stock voltages the majority of mine (sapphire extremes) were not stable. If one card doesn't like being at 970, it will mess up the entire system. I'd put them all to 900 just to get things working. After it's run for a few hours then I'd put it at 950. That's where I found all my cards worked fine at stock voltages and still got 304 mhash. Also what kind of power supply do you have? Have you run this system on Windows? As in you know all the hardware works fine and it's a BAMT issue. |
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Hi everyone,
I'm not sure if it's a bug or mistake on my part. On Linux if you set the memory clock without a performance-level it works fine and appears to set all performance levels with the memory clock inputted. If you set the engine-clock without a performance level it crashes. When I add back the performance-level it then works (and doesn't crash). Anyway great job the tool is great. =) |
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Wanted to thank you for BAMT (already did on the bitclockers forum the other day) and crosspost this from there. I've noticed a curious phenomenon. After running at 98-99% load for about 15 minutes, the second card in my rig (a 5870) drops to 75-80% load and stays there, and my hash rate drops the same. It's not a matter of overheating as it has a big aftermarket cooler, and temps stay around 58 degrees at 99% load (drop to 55 degrees at 75-80% - for comparison the other card is around 65 degrees at load, that's a 5850). I've played with various kernels, various aggression and workload settings but none seem to prevent this behavior. If I restart the mine then again the 2nd card is at 99% load for 10-15 minutes then drops to 80%.
I have no ideas how to troubleshoot this any further. 48h later, the problem still persists. Occasionally I've seen the load on that card go even lower, down to 40-45%. It will occasionally recover by itself, but often needs a mine restart. And sometimes even that doesn't fix it. I tried several other things, like -q 2 but even that doesn't fix it. I thought maybe it's overhead due to having X running on a headless box, bit of a waste if you ask me. I don't have much experience with Debian (I'm more of a Slackware guy) so I killed X as best I could but that brought the whole mine down unfortunately. I tried various kernels, including the latest svn of phatk (which I'm still running right now) with again no change in this behavior. I've had x freak out on my a few times. I'm fairly sure the screensaver is part of it. To get rid of it I did apt-get remove xscreensaver apt-get autoremove That should uninstall it and remove any unneeded packages. I do believe there is a patch for this from the fixer but I'm not 100% sure. |
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I agree. If you're accepting BTC, no chargebacks, leap of faith on buyers part, it's disgusting to charge more then retail. Not to mention a lot of this stuff is used bitcoin hardware which means it was abused pretty hard. I've seen people sell used bitcoin hardware for higher then retail prices. I could eBay them but then you have paypal/ebay fees so it works out to about the same. Figured I'd give people something to spend BTC on at a reasonable price. =) Excellent price for that too bad I’m not amd(my mining rigs get it but anything serious gets an i5 or better) but any chance to get new components for less than their listed prices is good to see and a relief compared to the usual on this forum.
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Selling for 6 BTC each shipped within the continental US. Both were purchased within the last two weeks. Both new, sealed, never opened. Both come with receipt which gives you the full 3 year warranty from AMD. I got them from a combo and didn't need the CPUs. If you're building a mining rig that can still be a gaming rig when called upon this is a great CPU. Verification Images: https://i.imgur.com/4zYTN.jpghttps://i.imgur.com/q4Wvh.jpghttps://i.imgur.com/c7n3f.jpgProduct Link: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=6620916AMD HDZ560WFGMBOX Phenom II X2 560 Dual Core Processor - 3.30GHz, Socket AM3, 6MB Cache, 2000MHz (4000 MT/s), Retail CPU w/ Fan Processor Interface: Socket AM3 Processor Class: Phenom II Processor Speed: 3.30GHz Cores: Dual L2 Cache: 1MB L3 Cache: 6MB Bus Speed: 2000MHz (4000 MT/s) Fan: Included Wattage: 65W If you'd like more information or images just PM me! EDIT: CPUs have been sold! |
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can you add some new settings, for example when a miner not working for some minutes, then reboot the system.
i find some cards not working for long time.
you've probably overclocked your cards a bit too much. if it was just phoenix having issues, they would die and move to the next pool (or wrap around to first pool). I would slow them down a little, chances are you won't have this problem any more. at least for me, when a card locks up, a reboot doesn't help anyway, in fact it's worse because the hung card will prevent the system from coming back online. have to reset via reset switch or even power off to get them alive again. I might add some kind of auto reboot at some point, but I think you'll find that in many cases that would just lead to all your cards being down in the machine as it can't come back up, instead of the one being hung. I really find sometimes, shutdown -r 0 seems not work, it seems system hangup sometimes. I've had that happen, was due to 1 of the cards being overclocked too much. Once I found the right overclocks, I've run BAMT for days without issue. Only time I take it down is when I'm messing around with it. If P |
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You must be kidding. $481 for one board? You could buy 7 of the popular Biostar A870U3 for less and that gives you 28 slots for GPUs. (or numerous other options) He never asked if it was a good idea, he asked what boards can do it. I've done a few builds and 3 seems to be a good number where you can get a $30-$50 mobo, $50 psu (good quality). As you go up to 4, 5, 6 you need a much more expensive board and much more expensive psu. The main problem becomes the number of systems. I can build a 3x gpu systems that are cheaper then the 4x gpu setups but is it worth having 2-3 extra rigs to save a few hundred? I have 5 3xgpu, 1 x5 gpu, 1 4xgpu and while the 4/5x gpus were more expensive in terms of dollar per mhash, my next few systems I'm leaning towards 5x gpus. It's less rigs to manage, less space, easier to focus cooling. You can get 6 gpu boards for under 200 as long as you have risers. It really comes down to how much money you have and how much space. If you can only have a max of 4 rigs then I'd go for 5-6x gpu rigs no question. |
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A cautionary tale for OCers.. So, I'd been running it for a week straight. OCd with AB, 940MHz core oc/820MHz mem uc. Stable at 80C per core. Using CCC to boost the power to each core by 4 and 5 pct, 0 and 1 respectively. Anyway, I decided to take the memory down further. Unlocked AB and took it to 700. No worries. So then I tried 600. Only I didnt type 600, I typed 300. Artifacts and malignment everywhere. Then it hung. So I turned it all off and went back to BIOS 2, restarted. Soon as windows loads - fan at 100%, frozen. Restart. Uninstall CCC, start again. Now it dies during install. Im tearing my hair out. I figure CCC has the power settings somewhere that didnt uninstall. So instead of doing it again, I manually delete every ATi and AB file and registry. After which, run uninstall again, and reinstall. With baited breath I waited.... And it worked! Stable, CCC runs OK. (I didnt mention - the only way to start outside safe mode was to open taskmgr and kill MOM.exe before it could do anything.) So, I start mining again, running AB and CCC. I restore the power settings, leave the memory at a safe 820MHz uc. D'oh. I didnt disconnect the DVD drive I connected to reinstall drivers. Power down, take it out, reboot. DOA. I now have deny all user access to both instances of MOM, and CCC. I'm fairly sure the card memory is fried now, or at least damaged. Its mining at a happy 810Mhash/s right now, I'm scared to game with it though. Moral of the story? WATCH YOUR GODDAMN FAT FINGERS.  You didn't almost brick it. You could put in -10 for memory and it's fine. You could put in 50 for memory and it's fine. You can't brick it by setting the core/mem with CCC. Worst case you uninstall/reinstall. =) |
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Fixed. Nope, fitty had it right the first time. The login is over https and this stops anyone sniffing your password (so long as you check it is actually https and not http before you enter it), but viewing topics and posting is done over unencrypted http. This means that the cookie used to authenticate you after you've logged in is also sent unencrypted over http and anyone who's sniffing your traffic can clone your cookie and gain access to your account. This is exactly what the infamous Firesheep extension for Firefox allows an attacker to do; a lot of sites have this issue. I don't know how you're doing that. Every single access I make to the forum is through https. Because your bookmark is https. Google bitcoin forum. Click the http:// link. If you set "remember me" when you logged it, you're on the forum, logged in, on http. The only way to get https is by going through a https link back to the forum. The forum should force https plain and simple. With the amount of attacks, trojans, wallet stealers, it's a pretty simple fix. The extra load on the server is minor and it gives a lot of security. Global SSL cert is like 195 bucks a year. Crypto virtual currency network and the wallet/website are unencrypted. |
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4x5830
OC 950
785 at the wall
1200 mhash
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Always update your motherboards BIOS if you have any issues.
I had a ton of problems booting BAMT on the MSI 890FXA-GD70. Once I updated the BIOS everything worked fine.
What bios version did you upgrade to? I have that mobo as well and had some issues trying to boot BAMT. I honestly can't tell you. Maybe A1 or 1A. Download Liveupdate from MSI http://download1.msi.com/files/downloads/uti_exe/LiveUpdate.zipRun it, click scan. Select the MB Bios update. It will detect the right BIOS and let you update it via floppy or through windows. Took about 2 minutes. |
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Always update your motherboards BIOS if you have any issues.
I had a ton of problems booting BAMT on the MSI 890FXA-GD70. Once I updated the BIOS everything worked fine.
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The price of BTC doesn't matter. $5 or $20 it really has no effect. People sell based on usd/euro etc... No one locks in prices at a set BTC. If you sell a $20 item for 1 BTC or 4 BTC it really doesn't change anything. The person buys the bitcoins, sends them, the seller cashes them out. At $5 and at $20 it's the same process. It's always been discussed that 50-80% of miners leaving wouldn't really change a thing. Day traders, investors, people playing the exchanges don't matter. All those people could fuck off right now and people would still be buying BTC, using BTC, and sellers selling the BTC.
Which is why there's no collapse. The people powering BTC, the people using BTC, don't give two shits about how much it's currently worth on the exchanges. There's APIs now that auto convert USD to current market value BTC. Does the API, buying, seller really care if it's $5 or $20? The API just converts it to the USD value and sells the item.
If anything BTC hitting $5 would get rid of the short term for profit miners who are drama queens every time the price fluctuates because they're in a panic to get their money back from their investment. It also gets rid of the people treating BTC like gold bullion.
BTC was never created to be a collectible. It's a virtual currency. Letting people can exchange goods and services. So Jimbo in Poland doesn't need a bank, visa, mastercard, or paypal to sell his homemade bellybutton lint sculptures. He can accept BTC from every corner of the planet. People seem to think that having people profit off of the investing, trading, mining is the core of BTC. It's not. People using BTC as a currency is the core of BTC, will always be the core of BTC, and those people don't give two shits what the current market value is.
They login, buy btc, spend them, get their shit. Whether it's $5 or $50 doesn't change anything. If all the people holding BTC like it's gold bullion cashed out, the people who are using the currency would still be using it the next day, the next week, the next month.
It's true that the price of BTC is irrelevant for trades where it's converted seamlessly at either end.. but in practice there is a fair overhead in both fees and time for conversion. (I'm sure it varies from country to country - but for me it's a couple of days + 5% or so) Once there are significant number of merchants accepting BTC, it seems to me that ironically, the market value of BTC could go up if governments start to make difficulties for the exchange points. The smoother the flow in and out of BTC - the less need to hold a fat wallet. The fee's don't really change. The fee's are based on USD not on BTC. If you're buying $50 worth of Bitcoins, it doesn't matter if you get 25 bitcoins back or 2 bitcoins back. You then go send those 25 or 2 bitcoins to the seller, get your stuff, the fee's are the same. The seller sells 25 bitcoins or 2 bitcoins for $50, the fee's are the same. The core transactions of BTC don't rely on BTC sustaining a magic value. People used BTC to buy stuff when it was $2 and they did the same at $20. If BTC was 50 cents, you'd still load $50 and buy 100 BTC. Then you send the BTC and the seller sells his 100 BTC for $50. Miners would revolt, but even that doesn't change much. We've seen a mass exodus of miners already in Namecoin. Difficulty was way too high, the guys left worked through it, it adjusted, namecoin is running fine. BTC has gotten big enough any mining exodus would take weeks and the difficulty would keep adjusting as it happened. The network works just fine at 1,500 ghash as it does at 15,000 ghash. As long as people use BTC as a currency (which is seems lots of people are) then it will remain very strong. The market, traders, investors, miners, they're all leeching the system trying to make money for themselves and really have little effect on the future of BTC. The importance of the network remaining "profitable" for those people is a joke. The grass roots (no pun intended lol) buyers and sellers run the show. |
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701 watts at the wall
3x 6950 unlocked shaders
OCed to 905
1200 mhs.
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Received an email today from Dwolla, with them announcing they've passed $1m in daily transactions. They've got a nice infographic chart showing their growth since December. Now, of course, it is strikingly similar to the growth of interest in Bitcoin (starts jumping fast in May, right as Bitcoin started getting traction).
However, they're not mentioning Bitcoin AT ALL in either their email or graphic. It's understandable of course, but I found it amusing. Am I wrong in speculating that a significant part of their growth is due directly to Bitcoin? My guess is that they have a love/hate relationship with Bitcoin, as it's bringing them massive business, but is also likely to make them obsolete before they ever truly succeed.
Thoughts?
That's why it's funny when people freak out over BTC prices. There are a ton of people buying and using bitcoins. These people aren't trying to make money off BTC, they aren't mining, they aren't "investing", they're using it for what it is, a currency. BTC has a strong future because of the people using it as a currency, not because of the miners, traders, investors. Those people are trying to make money off BTC. As long as people use it to exchange goods and services, which clearly it looks like they are, BTC is golden. The price of BTC doesn't matter. $5 or $20 it really has no effect. People sell based on usd/euro etc... No one locks in prices at a set BTC. If you sell a $20 item for 1 BTC or 4 BTC it really doesn't change anything. The person buys the bitcoins, sends them, the seller cashes them out. At $5 and at $20 it's the same process. It's always been discussed that 50-80% of miners leaving wouldn't really change a thing. Day traders, investors, people playing the exchanges don't matter. All those people could fuck off right now and people would still be buying BTC, using BTC, and sellers selling the BTC. Which is why there's no collapse. The people powering BTC, the people using BTC, don't give two shits about how much it's currently worth on the exchanges. There's APIs now that auto convert USD to current market value BTC. Does the API, buying, seller really care if it's $5 or $20? The API just converts it to the USD value and sells the item. If anything BTC hitting $5 would get rid of the short term for profit miners who are drama queens every time the price fluctuates because they're in a panic to get their money back from their investment. It also gets rid of the people treating BTC like gold bullion. BTC was never created to be a collectible. It's a virtual currency. Letting people can exchange goods and services. So Jimbo in Poland doesn't need a bank, visa, mastercard, or paypal to sell his homemade bellybutton lint sculptures. He can accept BTC from every corner of the planet. People seem to think that having people profit off of the investing, trading, mining is the core of BTC. It's not. People using BTC as a currency is the core of BTC, will always be the core of BTC, and those people don't give two shits what the current market value is. They login, buy btc, spend them, get their shit. Whether it's $5 or $50 doesn't change anything. If all the people holding BTC like it's gold bullion cashed out, the people who are using the currency would still be using it the next day, the next week, the next month. |
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Is it dangerous to use tradehill, mtgox, etc.....on tor?
If it's https it's pretty secure. If it's http then it is possible for a tor node to sniff the data. Anything you send over http would be visible. Which means logging into a site that doesn't use https you'd expose your login/password. TradeHill, MtGox all use https so that's not a problem. Gmail is 100% https now I believe also. All banks are https. This forum only uses https for your login. Which means people could sniff your cookie while you browse/post. Anyway, as long as it's https then you're fine. Anything non-https is less secure then your internet connection at home. The odds of someone sniffing one of your exit nodes, is probably pretty slim. |
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