Does dual mining really increase rewards that much?  I have always avoided it because the one time I did try, I found that mining a single chain actually produced better results.  Has the tech improved and everyone should be dual mining now, or are there certain cards where this makes sense while others do not?  I'm genuinely curious because all of the miners seem to have dual mining options these days, yet I can't seem to figure out how this would be beneficial when I consider my own results (admittedly a long time ago).  If anyone has any information or a resource to help me learn more about dual mining and if it is worth it, I would be appreciative.  Thanks!