2. Minergate Software doesn't work for GPU mining, actually, don't use it at all. The alternative mining clients are best. Use something like Claymore's GPU and CPU clients.
I've tried downloading Claymore's clients, but I've found them a little fishy. I downloaded it, and my av gave me the usual Trojan report. But when I tried to delete it after, I couldnt, it said it was in use. I restarted my pc and I still couldn't... A little sus to me.
I don't trust minergate software either. Claymore's stuff is fine, most all miners give the AV issues, you just have to disable av scanning for those directorys.