Claymore claims that its dual miner allows you to connect to a second pool and mine Decred/Siacoin without decreasing hash rate for ETH mining. Has anyone played around with this?
So, I got the configuration and am mining DCR… it is not worth it. The pool I am in has a 1% fee on coinmine.pl. There is no return on this. WhatToMine.com shows a $0.03 annual revenue. Unless you want to save up extremely small quantities of DCR this isn’t worth doing. My GPUs were running over 30Mh/s before dual mining. They’re just slightly above 29Mh/s during.
I switched back to ETH only and they returned to over 30Mh/s. So, my consensus is that Claymore is incorrect. Dual mining does have a slight cost to your ETH hash rate!