I've always wondered something about 51% attacks. Take Litecoin as an example - 18gh network hash at present.
Does one need 9gh to 51% attack it or 18gh? The reason being, if an entity attacks with 9gh, that makes the total network hash 27gh and of course 9 is no longer half of 27.
So does an entity need 9gh to attack with success, or is it 18gh?
You need to have 18GH/s, + a little more, to get 51%. Match and beat, current hashrate, control 51% of the total hashing power If they can take out a few pools, then they need less than 18GH/s. My mining are in several pools just in case some of them are down. |
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It depends on the definition of gambling. The outcome of mining bitcoin is definite in long term.
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The OP suggested increasing the amount of coins via the stock split principle, thus in reality nothing will change.
If 1 BTC = $100, then 0.5 BTC = $50, and there would be twice the number of bitcoins as prior to the split worth the same exact amount. In case I presented it incorrectly, the Market Cap will remain the same with with twice as many bitcoins in the wild worth exactly half as much at the moment of the split.
Hell, you can do a reverse split all the down to 1 BTC = The Current Market Cap.
That said, ideally a 10:1 split would be better, with each unit seemingly easier to obtain at ~$10 each (ain't got a clue as to what the current exchange rate is, hence the ~).
I agree with the above post. We are using mBTC, uBTC. That is effectively an increase the number of BTCs. |
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Maybe the price will drop to the point that GPU miner will make to profit due to the electricity price. For me, it is $68.
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So why running both 7950 and 7970 on the same rig would be a problem?
My 7970 likes -g 2 My 7950 likes -g 1 You can only use either -g 1 or -g 2 in one instance |
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800,000 Avalon chips are going to drop in August each does about ~300 Mh this is 240 Terra or a trippling of the network in 4 weeks
BFL will be lucky to have shipped 5000 out of the 60000 they have on back order for All of their products
They have currently shipped ~150 on the 5GH low end units and do not have a working LC or SC 30\60GH unit and still 59,850 units on back order
This is just avalon let alone all the other ASIC guys current and coming online
You are assuming they will magically place themselves in a working PCB, ship themselves out, and start hashing away with no problems. Look how may problems BFL and Avalon have faced the past year. Do you really think all these fly-by-night companies are not going to have problems as well? The difficulty will triple, quadruple, etc. But it won't happen overnight. Stop with the doomsday scenarios people. It is happening now. Difficulty jumped 28% last time. It is predicted to jump 18% in next 2 weeks. |
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I have a cheap powercolor AX7950 with a single fan in the middle of the card. Temps on the card were a constant 85+ at 100% fan when mining with a "normal" overclock. Since removeing the plastic housing temps have dropped to 75 on average and I can reduce the fan speed down to 70%. I have concluded the shroud is merely there to look shiny.
I have a sapphire with a single fan that sits at 70 degrees with 70% fan.
I think quality of the card plays a lot into how well the cooling shroud is supposed to work. Key example is the Sapphire has a heatsink on the vram and an offset fan. The Powercolor card has no heatsink on the vram and the fan is located in the center of the card.
I did the same to my HIS reference 7950, same as your AX7950. The temperature dropped from 82 to 76c. I did not try on my Sapphire 7950 as the temperature is just 70c. |
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If you use p2pool, it pays out instantly, but with too may small coins (dust coins). If you want to use these coins later, there is high transaction fees.
Just choose a normal pool, and it will pay out your selected amount say from 1-50 LTC. So you will not incur large fees.
I have moved most of my rigs to LTC. Only 1 rig is mining BTC as the GPU is almost dead, it can mine BTC, but the stress from LTC mining will make it very unstable.
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Not really.
In fact, it has been really profitable during march and April, lost a lot of profitability when LTC crashed from 0.03 to 0.022 or from $4 to §2.8 as we have seen.
Right now, LTC is 20% more profitable than BTC.
Since difficulty changes happen, you will see that whether or not mining a coin is profitable is a short to medium term decision. After all the question is whether or not you are actually mining the coin because it is a good coin or speculating.
Apart from BTC and LTC, I have not found a coin yet that is worthy of anything more than speculation. Freicoin is a great idea, but people won't like the idea, even if it does work towards social psychology well.
+1 |
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If you just put these two problematic GPUs into the mining rig, does they work?
I think the mother board could be the source of problem.
Can you try lowering the mother board memory frequency? Lower the CPU frequency? Or change the hard driver?
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If you just put the two GPU (which is in office computer) into the mining rig, does it work? If it works, then add more GPU on the mining rig. I suspect something might be wrong with the mother board.
Can you try Catalyst 13.4?
Does it happen more on LTC?
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i'm thinking that the Cap might be there to cancel any potential RF interference. Back in the day, early 70s, when people were running CB radios with way too much power, people could hear the broadcasters transmissions over their stereo's speakers. the solution was to put a capacitor across the speakers terminals.
RF interference is high frequency. The capacitor shown here is only working for low frequency signal such as below 1kHz. You need to a small capacitor to have lower inductance. I think the capacitor here is not necessary. If you use a signal power supply, it is OK. I measured the output from different rails of a power supply, there is a zero resistance between, that means the output of different rails are connected internally. On the motherboard, it is different. The +12V connector to the CPU circuit is cut (independent) from the rest of the +12V. On the graphics card, the +12V from the PCIE slot is cut (independent) from the 6 pin and/or 8pint connector. |
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i'm thinking that the Cap might be there to cancel any potential RF interference. Back in the day, early 70s, when people were running CB radios with way too much power, people could hear the broadcasters transmissions over their stereo's speakers. the solution was to put a capacitor across the speakers terminals.
RF interference is high frequency. The capacitor shown here is only working for low frequency signal such as below 1kHz. You need to a small capacitor to have lower inductance. I think the capacitor here is not necessary. |
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A newly bought GPU will not make the price back from bitcoin.
Maybe you can mine the cost back with litecoin.. It's a big maybe.
Agree. I am still buying old HD5850 ($120) for mining LTC. At present difficulty level the hardware break even date is about 205 days. If it is not profitable, I will sell the card, for $60. |
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it will be useful though for all other kinds of crypto works in the future. and thus "priceless"
like the raspberry pi helped to spread cheap computers this will bring mining to 'every household'
Can it be used for other coins such as PPCoin at the moment? |
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LTC mining is more profitable at the moment.
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Does the office computer crash every morning? Maybe your computer is doing something else and used more power.
Try powered riser on your mining rig (with 6 GPU).
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The different level is 15.6 million now, a jump of 28% from the previous one.
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