I just overclocked my MSI gtx 1060 6gb to +150CC/+500MC and i get some artifacts on some screens in Heaven and Valley, sometimes a black screen occurs for 5 seconds, and then it continues. But while playing games(Witcher 3, Shadow of War, Dishonored 2, Dark souls 3, BF4) i don't get any artifacts, nor any crashing. I haven't tried any other benchmarks yet. So is my OC stable, or i need to lower it?