I have done some research and I've figured out that the "S" in the model name means that it uses less power. Now, what I don't know is if its possible to overclock it even if it hasn't got the "K" mark? (If I've understood the whole thing, the k cpu's are the only ones able to be OC'd.) Sorry for my bad explanation but I really hope that someone has something to say so I know if its even possible to overclock the thing.