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Great work! I wonder how long before someone creates a completely automated bulk alt-coin generator, along with corresponding auto-generated announcements. Perhaps the coin name and icon could be obtained from a random Google image search  |
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One thing to keep in mind now is that, for the first time, there is a fundamental difference in the organization of the mining between BTC and LTC.
BTC will continue to oligopolize, and be dominated, likely, by a few players like ASICminer which have the capacity and the cash flow to maintain their market share regardless of network hash rate, and thus induce increases beyond those caused by new hardware coming on line. This will likely drive all the GPU and FPGA based miners out of active mining. It will also mean that people that are now buying fixed hash power, regardless of the absolute amount, are going to be disenfranchised in relative terms in BTC.
For the reasons everyone knows - primarily those associated with the work algorithm difference - LTC will remain more decentralized.
I have my own ideas of what this is going to mean in relative and absolute values of the two, but so does everybody else have their ideas, so I'm not going to bore anyone with mine.
I also see bitcoin becoming an oligarchy. I find it interesting that such a seemingly small detail such as differences in the computational characteristics between the two hashing algorithms could have such a big impact on the organization of the litecoin and bitcoin mining networks. I have seen some threads recently proposing to change the bitcoin hashing algorithm because of the issues you raise, but if ASICs already control most of the network, I wonder if it may be too late. |
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I think the future of bitcoin is largely in the hands of the ASIC manufacturers. If they keep most of the ASICs for themselves, they may end up controlling a significant chunk (maybe even most) of the bitcoin network once the remaining GPU miners have left. We would then have a situation where the network's computing power (and most of the newly mined bitcoins) are concentrated between a relatively small number of ASIC manufacturers. If that happens, I could see it crashing the value of bitcoin, but it could be good for the scrypt-based alt coins.
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The big companies are not delivering to us. There is hoarding going on. I'm not sure what is going on with Avalon.. but BFL should be sued. I didn't buy anything from them or I'd be the first to try to rally people.. Ever wonder where BFL offices are located?  This is a map generated from the IP addresses of miners. Yup I've noticed that statistic as well. You know damn well both BFL and Avalon are delaying their shipments so long just to "test" their current supply. The profitability of mining Bitcoin conveniently sky rocketed right around when all these asics should have been shipped. Now we're hearing excuse after excuse as to why they're being delayed, yet the net hash rate has continued to sky rocket. No way it can climb this fast with just GPU miners. The only way you could really sue them is if you had an inside source to admit their delays were un-warranted, but they could just come back with "oh we needed atleast 3 months worth of testing before shipment". All I know is if I had a pre-order with either company, I'd probably be banned from here by now from pure rants lol. It makes sense that this will tend to happen when specialized hardware (ASICs) exists that is orders of magnitude more efficient at mining than commodity hardware (GPUs); the few companies that are capable of building that hardware will eventually control a significant fraction of the total network. It will be interesting to see how this plays out. What would happen if in a year from now, all the remaining GPU miners have left bitcoin for LTC (or other scrypt alt coins) and the bitcoin network is controlled by say 10% ASICs that are eventually delivered to costumers and the remaining 90% consists of ASICs that are controlled by just a few companies? Perhaps at that point people will consider changing the bitcoin hashing algorithm to something that is more ASIC-resistant like scrypt? |
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Mostly 95C but a couple of 7950s run at 100C. Not good I guess and the weather is only getting hotter!
Wow! How long have they been running like that? I wouldn't expect they will last more than a few months at those temps. Maybe try undervolting or reducing clocks to keep them below 90C? |
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Bitcoin is to dollars as Linux is to Windows.
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Hi mt_bird, can you post your complete cgminer settings please? I am not very familiar with under/overclocking and these settings. Thanks! Wow thanks, I set temp to 80 and almost needed to check if the cards are still running, because they are so quite now  Can you give me a hint regarding the Core Voltage too maybe, or can I get more than these 540 and still keep the cards silent (silent != vacuum cleaner)? You can reduce fan noise by increasing target temp: --temp-target 80, for example. No need to run the card at 70C. 80-85C is still perfectly safe and the fan will be quieter and last longer.
Well, my cards run stable with --gpu-vddc 1.125 at 1100 MHz core clock. You may need to experiment a bit to find the lowest voltage for stable operation at your desired clock. Hi, The following settings work for my Sapphire 7950. I am using Linux, though, so there could be differences if you are on Windows. I need to use powertune 20 or else my card's clock won't stay at 1100, but you might not need it: --temp-target 80 --temp-overheat 87 --temp-cutoff 91 --gpu-engine 1100 --gpu-vddc 1.125 --gpu-memclock 950 -I 7 --auto-fan --gpu-powertune 20 |
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Wow thanks, I set temp to 80 and almost needed to check if the cards are still running, because they are so quite now Can you give me a hint regarding the Core Voltage too maybe, or can I get more than these 540 and still keep the cards silent (silent != vacuum cleaner)? You can reduce fan noise by increasing target temp: --temp-target 80, for example. No need to run the card at 70C. 80-85C is still perfectly safe and the fan will be quieter and last longer.
Well, my cards run stable with --gpu-vddc 1.125 at 1100 MHz core clock. You may need to experiment a bit to find the lowest voltage for stable operation at your desired clock. |
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You can reduce fan noise by increasing target temp: --temp-target 80, for example. No need to run the card at 70C. 80-85C is still perfectly safe and the fan will be quieter and last longer.
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What is your gpu voltage? If you are overclocking and running stockish 1.225V or so, I can believe that each card might draw nearly 300W. You can save a lot of power by lowering voltage to 1.125V or even lower. If you cards are voltage locked, there might not be much you can do about it, though.
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I've been using coinotron off and on for about a month. Their website is often unreachable, but no problem connecting to the pool so far and payouts have been as expected.
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My guess: 34M by Aug 1st.
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Everyone who transferred large BitCoins in the beginning (100-1,000) to buy items and 'pizza' are kicking themselves in the ass right now.
This early spending may have been necessary. Bitcoin might be where it is today if the very early adopters had all decided to hoard their coins. |
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"Hey, why does your computer sound and feel like a hair dryer? You wouldn't happen to be mining, would you?"
That just made my day :-) Yeah, the bad news, it's going to be 4x 7970. The good news, sound is not a problem as the pc would be in another room (not air conditioned). Are there any recommendations on the case for a closed one? I'm using a Cooler Master HAF X case with 3x 7950 with good results. I think you might be able to fit 4x 7970 in there with creative use of risers. You would want to remove the dust covers from the various grills to improve airflow. |
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I'm not familiar with those 7970s, but if they are voltage locked, might be difficult to keep them from overheating inside a case. Open air setup would be better.
BTW, I have three 7950s inside a HAF X and they run cool enough, but I don't know about three 7970s... If you go with the HAF X, be sure to remove all the dust filters from under the various grills to improve airflow. There's enough room inside that case to rig up risers to get even more separation between the gpus. Also, for my Sapphire 7950s, I found them to run cooler if I reversed the side case fan to make it exhaust instead of intake.
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I basically agree with cdog. I try to keep my cards under 85C now, but I've actually run a couple of them in the low 90s for several weeks with no problems. Even if you run the cards around 90C, they should still last a long time (maybe not several years, but long enough to pretty much become obsolete by the time they fail).
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I'm guessing the middle card is the one that's overheating? You should get some risers, but in the meantime, try undervolting and/or underclocking the card(s) until temps are safe (under 85C or so).
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