So I overclocked my 970 using MSI afterburner and I put the power limit to 110% and temp limit to 86,the core clock was set to 155 at first,then tested up to 180.The memory was working great on 400 MHz.The first day everything ran fine at around 56 degree celcius.It ran GTA V at a stable 60FPS without artifacts.Also League Of Legends ran fine.The next day I was in game in League,and suddenly a dark green screen appeared on my monitor,dissapeared and my game crashes,it keeps doing this,even if I reduce the overclocking.But when I keep it on stock,it doesn't crash.