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Author Topic: Shares: 0 accepted after 12 hours of mining  (Read 15497 times)
trectuse
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October 25, 2011, 09:11:48 PM
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I am currently mining on the deepbit.net pool and I left my guiminer (puddinpop's i beleve) to run overnight, when i came back, i had no shares accepted yet. My khash/s rate is around 250-300.
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likuidxd
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October 25, 2011, 09:23:12 PM
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I am currently mining on the deepbit.net pool and I left my guiminer (puddinpop's i beleve) to run overnight, when i came back, i had no shares accepted yet. My khash/s rate is around 250-300.


If you're mining with a cpu it will take some time to have a valid share accepted. My buddy tried with his MacBook Pro and the most he had was 8 shares in a day

trectuse
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October 25, 2011, 09:26:34 PM
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Ill post some screen shots, as far as I know i'm mining with my gpu.
http://i.imgur.com/Z8uxA.png
http://i.imgur.com/S80XU.png
likuidxd
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October 25, 2011, 09:34:22 PM
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Nope, you are mining with your CPU. Change in the drop down menu labeled device to your GPU

trectuse
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October 25, 2011, 09:44:07 PM
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Nope, you are mining with your CPU. Change in the drop down menu labeled device to your GPU
I don't quite understand which drop down menu you are talking about?
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October 25, 2011, 09:50:20 PM
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trectuse
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October 25, 2011, 09:53:41 PM
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Ah, thanks you, unfourtunately that was the only drive i had, thank you anyway!
likuidxd
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October 25, 2011, 09:58:26 PM
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Do you have a GPU in your computer?

slush
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October 25, 2011, 10:02:02 PM
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No share overnight with 286khash/s is pretty possible (with little bad luck). If you don't have GPU, with this CPU mining isn't for you :-(.

trectuse
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October 25, 2011, 10:06:06 PM
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i honestly have no clue if i have a GPU, the computer im using is from 2003, and i wanted to know what it would be like to bitcoin mine.
trectuse
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October 25, 2011, 10:08:23 PM
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No share overnight with 286khash/s is pretty possible (with little bad luck). If you don't have GPU, with this CPU mining isn't for you :-(.
do you possibly know of a tutorial to install a gpu?
likuidxd
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October 25, 2011, 10:09:24 PM
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Honestly, it won't be worth it. If the computer is that old, you probably wont even be able to put in a GPU that would be worth while either.


EDIT
You'll need an available PCIe slot to install the GPU and it may not even have one.

trectuse
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October 25, 2011, 10:14:16 PM
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Honestly, it won't be worth it. If the computer is that old, you probably wont even be able to put in a GPU that would be worth while either.


EDIT
You'll need an available PCIe slot to install the GPU and it may not even have one.
thanks, ill try it on a better computer.
nmat
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October 25, 2011, 10:56:47 PM
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Most people fail to realize that mining with a CPU may be impossible because sometimes a block is found before you are able to complete a share. So this is not a matter of economic viability: having a GPU is a requirement for mining.
trectuse
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October 25, 2011, 11:06:08 PM
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Most people fail to realize that mining with a CPU may be impossible because sometimes a block is found before you are able to complete a share. So this is not a matter of economic viability: having a GPU is a requirement for mining.
so perhaps i could do some mining in a pool where blocks are solved slowly (over a period of hours?)
terrytibbs
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October 25, 2011, 11:13:16 PM
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Most people fail to realize that mining with a CPU may be impossible because sometimes a block is found before you are able to complete a share. So this is not a matter of economic viability: having a GPU is a requirement for mining.
so perhaps i could do some mining in a pool where blocks are solved slowly (over a period of hours?)
Not slow enough. If a block gets found by the network, and you still haven't submitted a single share, your node starts hashing away at a different nonce, and you don't even get one stab at submitting a share.

Bitcoin mining is a very specialized business, you'll be better off investing what you would've paid for electricity into Bitcoins directly, or looking into a CPU-specific alternate crypto-currency, such as Litecoin, Tenebrix, or Solidcoin.
trectuse
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October 25, 2011, 11:23:05 PM
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Most people fail to realize that mining with a CPU may be impossible because sometimes a block is found before you are able to complete a share. So this is not a matter of economic viability: having a GPU is a requirement for mining.
so perhaps i could do some mining in a pool where blocks are solved slowly (over a period of hours?)
Not slow enough. If a block gets found by the network, and you still haven't submitted a single share, your node starts hashing away at a different nonce, and you don't even get one stab at submitting a share.

Bitcoin mining is a very specialized business, you'll be better off investing what you would've paid for electricity into Bitcoins directly, or looking into a CPU-specific alternate crypto-currency, such as Litecoin, Tenebrix, or Solidcoin.
Hmm alright, thanks.
slush
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October 25, 2011, 11:26:57 PM
 #18

sometimes a block is found before you are able to complete a share.

No. Mining with CPU has (proportionally to its hashrate) the same chance as mining with GPU. All miners are refreshing their work periodically every few seconds regardless on their hashrate, so slow mining isn't a reason for "skipping a block".

But CPU mining sucks for economic viability, of course.

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October 25, 2011, 11:29:07 PM
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do you possibly know of a tutorial to install a gpu?

GPU (Graphics processing unit) is simply "better graphic card", something like ATI Radeon 5870.

nmat
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October 25, 2011, 11:44:20 PM
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No. Mining with CPU has (proportionally to its hashrate) the same chance as mining with GPU. All miners are refreshing their work periodically every few seconds regardless on their hashrate, so slow mining isn't a reason for "skipping a block".

This would be true if you were solo mining with a CPU. Just to give you some figures: if you solo mine with a CPU - let's say you get around 2 MHash/s - you will have a 50% chance of finding a block in around 100 years.

So the alternative is to mine at a pool. But the pool only pays if you submit a share and since you can't submit a share fast enough, you will not earn anything. It's "theoretically" the same chance, but in real world you will simply not get paid unless your pool pays for invalid shares (and you need to tweak your client to disable long polling or something...)
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