Is it true that gpu with 2gb will be least efficient for mining eth ? What about R9 270x ? How much Mhashes does it produce? Please help me
They will be least efficient in mining in terms of getting your money back. If you build a rig, the hash is too small.
suppose R9 270x is mining at a rate of ~20 Mhash now. With increasing DAG size, they will produce less hashes ? BTW what is the hash rate for
R9 270x ?
It is probably down to 14-15 Mhash now as the amount of miners, and thus difficulty increases. The income from mining ETH will continue to decline as long as price remains high as more and more miners pile in. As a side effect, once enough people buy equipment to mine, even once the price goes down the competition for those few cents of profit will remain fierce, as now all the people looking to get rich quick will need to hang on in hopes of getting their investment back.
This pattern has repeated throughout early BTC mining, then scrypt mining, and on with various alts as initial profitability predictions makes it seem like a no brainier to invest, but after awhile those predictions turn out to be faulty as people did not consider the competition, after all who doesn't want free money? In the end only those with existing equipment, or cheap electricity, or preferably both, will win in the long run. I would not recommend running out and buying a bunch of new equipment based upon today's profitability calculators.
Myself, I fall into the "I had existing equipment camp", but my electricity is not the cheapest. So while I am currently making some profit, based upon my own calculations it does not pay to invest in new equipment, even used cards since they have seen a recent run-up in price as well.
