I would imagine so. Been doing 1060/330 1.187v and 491 mhash/sec. 1070 is unstable, driver resets within about a minute. Will update if it crashes, or if its stable after 24 hours. Around these points, temperature is important, and if it's a warm day, sometimes 1 or 2 of my cards have to be restarted with a slightly lower speed.
Edit: 1055 stable for a few days now, 489 mhash.