Is it really so, that mining two coins doesnt decrease Ethereum hashrate? What is the best coin to mine with Ethereum?
Yes it does lower the ethereum hash rate. Most people think the decrease is not significant. Check what to mine for profitability on the second coin, knowing this always changes. I like Decred
But the profits from the second coin outweighs the 2% devfee (instead of 1%) and the decrease in the ethereum hashrate?
You have more factors to consider if you must wether dual mining is profitable for you:
- lower ETH hashrate
- +1% dev fee
- +power consumption (which is pretty much actually)
- higher temperatures
- faster hardware wear
all of the above factors are different for each gpu, so do your research
In my 580s, it is indeed profitable to mine ETH + DCR (even though in my country I pay 0.3$/kwh

)