Litecoin mining is currently more profitable for likely all GPUs.
From the bitcoin and litecoin hardware wikis, you'd get 300-400MH/s for bitcoin mining and 340-470kH/s for litecoin mining if you set it up properly (and there is something VERY fishy about you getting 250MH/s with your CPU, I'd guess it is using your GPU though you don't know it...).
I think you misunderstand the problem. The reason mining is becoming impractical is because there's too much of it. It's like a restaurant that's too crowded. It means you can't get a table, but the restaurant is not going to go out of business.
In many ways, it is just coincidental that GPUs are going at hashing. It doesn't surprise me that some GPU engines are a better fit than others. A particular GPU might be very good at some types of mathematical operations (or rendering, for that matter) but might not be particularly good for hashing.
This is discussed in some detail on the bitcoin.it wiki:
Apparently I do not have enough points yet to give your answer a vote, but your solution also worked for me! Adding -T to the command line command did the trick. Not only do I now get a neat output of what is happening; the -T parameter also made the entire mining process actually work!
Before adding the -T command:
Screen flashed with the "Started CGMiner ...
You can try to "auto-manually" add your GPUs to bfgminer by pressing M then + and then typing auto, or you can use the -S opencl:auto option when launching bfgminer.
NOTE: Not all graphics cards are compatible; various software is required (e.g., AMD APP sdk); it is not recommended to use GPUs for bitcoin mining with bfgminer.
According to README.GPU, the ...
Your best bet with a GPU is to mine scrypt coins. If you want the resulting payout to be in bitcoin, try using mining on a multi-pool like middlecoin.com. That pool automatically chooses the most profitable scrypt-based coin to mine and pays out daily in bitcoin.
I have 4 7950s pointing at middlecoin and make between .05 to .1 bitcoin per day.
There is a program called CudaMiner that can be compiled to run on Linux.
I've also written some more notes about compiling CudaMiner here
I get the same error using OS X 10.9 MBPR.
Even though I followed http://atomton.roon.io/compiling-cudaminer-on-os-x-10-9 exactly.
UPDATE: PROBLEM SOLVED.
in both scrypt-jane.cpp
In my opinion trading BTC has a higher potential of profit when compared to mining because of the sheer difficulty.
If you do decide to go for an ASIC.
I would recommend Coin Terra GoldStrike1 2TH/s ASIC miners.They are expensive at 6,000 USD.But their Break Even time on January Batch is 4 Days.If they deliver through this is the only miner I feel could ...
A long time ago I read about using amazon cloud instances when the value vs. effort made it profitable to mine with them, but that was before GPU-mining took over.
To be competitive today a service provider would have to employ ASICs. There would also be some economical overhead of providing the customer service, instead of just mining. Strict bitcoin ...
First the bad news: your Motherboard appears not to have a PCI-E Slot, which is required to fit any modern GPU. On the other hand for the price of a single GPU you can order more than 1 ASIC miner with lower power consumption, i.e., cheaper to run, and more computational power.
I'd wait until the first ones actually ship, though.
Bitcoin mining is principally an integer maths task, not a graphics task. It just so happens that the hundreds of processors found on modern graphics cards can sometimes be suitable for parallel calculation of the bitcoin task, at upwards of a hundred times the best available rate from four cpu calculations.
See wiki reports on bitcoin hardware for ...
You shoud instead use cudaminer for this. I use the same card and I have a mining rate of 150khash.
The reason why you get a low mining rate is because Nvidia cards use CUDA cores to do most of their calculation and most of the miners do not use them since the best graphic cards for mining are AMD cards (and they do not have CUDA cores).
I dont know where ...
I think the important factors for scrypt in OpenCL are as follows
GPU core clock rate
Memory clock rate / memory bandwidth
Memory bus width / channel
You can check out in Programming Guide of AMD Accelerated Parallel Processing.
single or double precision of floating number does not matter. Either SHA-256 or scrypt is ...
For Litecoin, if memory size is increased in processing the Scrypt
algorithm, for example to 384 kB instead of 128 kB (...), would the typical CPU
architecture (...) be likely to see a corresponding increase
No, it works the opposite. If you increase memory, which is used by the scrypt to generate a single hash, the time it takes to ...
Mining on a cpu at all is a bad idea, it can and will wear the cpu down, and is ridiculously slow compared to a gpu. Also mining with an Nvidia card isn't the smartest thing either as they are much slower than AMD cards. Regardless you will make next to no money mining with this kind of hardware given that there are thousands of people with ASIC miners that ...
No, neither CPUs nor GPUs of any kind are of the slightest use in Bitcoin mining. This has been the case for several years, since the introduction of ASIC miners which are now many orders of magnitude more efficient.
See In the ASIC-age, is it worth starting mining Bitcoin at home?
As of today (April 6, 2013) mining profitability on GPUs is at the highest levels ever, but that is only because the exchange rate has rocketed up so fast.
At the same time, mining difficulty has been skyrocketing and that pace of growth will likely outpace the increase in the exchange rate.
When mining, you computer creates hashes. These hashes must satisfy a certain condition. All a miner does is trying many many times to find a valid hash for a block.
For this reason, mining hardware performance is measured in GH/s, giga-hash-per-second, which are one billion hash calculations per second and it is called the hashrate.
It is good to know ...
Not really. In the question What is better for Bitcoin mining: More stream processors or faster clock? it is suggested that for an AMD GPU core it can be calculated as Cores*MHz*300. This is most likely only somewhat of an estimate, and I can't imagine it works on non-AMD GPUs.
Honestly though, FPGAs and ASICs are going to be taking over any day now, if ...
The market has progressed to ASIC miners, which are better adapted to the singular task of mining. ASICs generate much greater hash-rates and are much more energy efficient at the same time.
With the advent of ASIC miners the difficulty has been growing immensely: Since the review you linked was published in April the network's total hash-rate has grown 40-...