Whenever i use nicehash, either the new or the legacy one, my computer winds up "turning off" my graphics card. No screen, though the computer still runs. Turning it off/on is the only solution then.
When i mine with claymore (12 something) it happily chops away for days without breaking a sweat.... So no thanks... Unfortunately. Cause oddly enough Nicehash does put more cash in my exchange account in the end.... somehow...