Memory Clock Offset to lessen game crashes

So I’ve been having random but consistent game crashes on the enhanced edition. After messing around in some areas I found that overclocking my GPUs memory clock offset (nVidia GTX 760) would make the game crash almost as soon as my character is loaded into the game, so then I lowered it as much as possible. Now I can play for extended periods of time but I still crash here and there. Does anyone know why this even happens and if there is a more permanent solution besides getting a new video card?