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a 20 amp outlet can handle two rigs, just not the biggest rigs. But power is only half the battle, cooling is the other half and that gets pretty tough even on the commercial level.
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I am figuring it is a botnet. With botnets reaching past 1 million computers someone must have selected a group of computers with good GPU's in them. Imagine good GPU's in 1% of machines, breaking them off as a seperate botnet. Now run them at low levels, do not run them hard enough for fans to get aggressive or any slowdown. 10,000 machines could make 2TH ran slowly. The internet connection usage would be kept to a minimum by only getting the bare minimum information (no transactions) and relaying back only when a block is found. This could live under the radar on a machine for a long time if they did nothing else with the pwned machine. And for $3000 a day, they would not have to resort to any other uses.
Of course it could be 5000-50000 machines in play.... But this is what I think it is.
Requesting work from a pool with transactions or without transactions is the same amount of data for the clients. Yes, if they are indeed working that way. The miners may be doing all the work as solo and relaying the finished work (only when found) as well to a central location. That location may not actually be physically owned by the botnet, it may be just one machine (pwned) running the proper software to relay the finished block. If something goes wrong with that machine, they get another ip. If this IP moves from country to country it might help back up this theory. |
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I am figuring it is a botnet. With botnets reaching past 1 million computers someone must have selected a group of computers with good GPU's in them. Imagine good GPU's in 1% of machines, breaking them off as a seperate botnet. Now run them at low levels, do not run them hard enough for fans to get aggressive or any slowdown. 10,000 machines could make 2TH ran slowly. The internet connection usage would be kept to a minimum by only getting the bare minimum information (no transactions) and relaying back only when a block is found. This could live under the radar on a machine for a long time if they did nothing else with the pwned machine. And for $3000 a day, they would not have to resort to any other uses.
Of course it could be 5000-50000 machines in play.... But this is what I think it is.
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Can you guys release a full video afterwards so we can watch it non-streaming?
As long as ustream works as advertised, yes! I will save the video to my channel. |
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We will be on at 2pm central, 3pm EST or in about 50 minutes. |
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Not a hope in hell any of them cards support the OpenCL needed to mine with the first Intel MacPro had an 1900XT from ATI as an option and that does not support the mining so even older cards..
Ok thanks for the info. I'll have to wait until we EOL some of the Intel Mac Pros and start looking at their cards.  Probably be a while to get anything worthwhile out of them the first generation had the already mentioned 1900xt and 7300gt from nvidia. Then the HD2600 series was available in the 2nd and the third you had you had 8800gt as an option that I have my MP3,1. The fourth I believe you could get hd5870 which is definitely worth it I have one of them in PC gets 450+mh/s or there is the HD6870 as well good for around 300mh/s, these ones are about the only ones worth getting your hands on for mining. Now I think about it more the HD5770 was there too third generation I believe good for about 200-210mh/s all of these numbers are overclocked cards. Yes. Even now Apple is way behind. When I purchased an Intel Macpro in 2011 it had a 5770 in it. You could get an option for a 5870 but that was not standard. |
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Anyone currently use any of the Mac Pro G5's (stock) video cards for mining? Were any of them worth a crap (to mine at like 20+MH/s)?
Our company will be ditching about 15 of them, and I've been given permission to cannibalize parts if I want. And whatever I don't take will be going to a recycling company. So of course I'll be looking through the video cards to see what the stock cards are/were, and if we've upgraded any of them to something beefier. I really don't want any of the other stuff out of the G5s, although I am tempted to cannibalize parts to make a "super" G5 out of them all, but most likely I'll just let them go minus any video cards that are worth a crap.
We currently have several "mineable" cards still in some newer Macs in production, so I can't take any of those until we end-of-life them.
The G5 is one of the best looking computers inside and out. It is also one of the most power hungry computers as well, and that is without mining. You will be burning up a lot of power and making very little MH. Go for a single $100 5830 or better and you will get much more MH with much less power. |
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If anyone wants to buy or sell BTC in person, I will do so in limited quantities at the convention at mtgox rate plus 2% fee. If you have a need PM me.
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For all we know they might have found a semi-analytical/statistical algorithm that just takes a few computers and we calculate their hashing power only by solved blocks. AFAIK there's no conclusive evidence that it takes them 1.4GH/s to solve 30 blocks a day. That's just based on the current difficulty. All we know is that it still takes them at least some work to do it, otherwise they would be faster by now.
What?? I do not think you understand hashing. |
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I doubt it. Solominer 88.6.216.9 is doing more to cause difficulty increase then any other single source. They may be using BFL (I doubt it), but if they keep increasing at the rate they are going I would say they are using ASIC.
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I am having a problem undervolting a 6990. I use the "--gpu-vddc 1.0" command option but when I use the 'g' key to read back it is always at stock voltage. What am I doing wrong? cgminer -o http://pool:port -u username -p password -I 9 --auto-fan --gpu-engine 750 --gpu-memclock 300 --gpu-vddc 1.0 |
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At $305 for a fully working card the payback is pretty fast. I have bought many cards in the $300-$350 range. If they are still worth $305 then they have been a good investment!
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How much hashing power are we talking about?
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Thanks for a great transaction! Phone was as described. I shoud be streaming from this phone at bitcon San Antonio.
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17% failure rate, NOT running at 100% fanspeed. I would say that does uphold the 'fud' about killing fans within a year running 100% fanspeed.
My lower 7% AFR at a higher 100% fan speed proves you wrong. My point is that dust, not fan speed, is a much bigger factor affecting ball bearing life span. Dust, dust, dust. It's all about dust. Considering that it is 17% for the reference fans, the ones most of us are stuck with, seems like the figure I am going to use. And on those fans it is speed as well as dust that are the factors that kill them. |
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Or just variance. I got some cards going on >1 year. Although out of 24 5970s I have had to replace 4 fans so far and not all of them have been running a year.
4 out of 24 is a 17% failure rate for an average period of less than a year... For comparison my AFR (annualized failure rate) for fan ball bearings is 7%... far from the "OMG you will kill your cards in 6 months if you run the fan at 100%" FUD you find on the forums. 17% failure rate, NOT running at 100% fanspeed. I would say that does uphold the 'fud' about killing fans within a year running 100% fanspeed. But ok... if you want to run your fans at 100%, go ahead. Miners offline=lower difficulty. Fans dead=chance of purchase of replacement from me.  |
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While I do not know the hashes, the specs on these cards vs the price should make them not a great mining card.
The 7850 on the other hand should be quite interesting.
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