I have an AMD RX580 mining rig that I monitor remotely with GoToMyPC. There is no monitor connected to the computer. Recently I've noticed that when I remote access the mining rig GPU 1 will drop in hash rate by around 50%. I can look back at the hash rate history and see that before I log in the rate is normal, log in and it drops, log out and it goes back up.
What gives???
You could go to the miners process under the details tab in task manager and set "Priority" to "realtime" and it will give the program absolute priority over any other process in the processing queue.
That what I had to do for my AMD E350 rigs, piece of shit netbook CPU is just so under-powered....