Oh wow, big price difference. So you can get the 2160 to 3.4 GHz? The highest I had seen as 3.0Ghz. I'm sure that the E8400 or other cards could be over clocked to 4GHz or at least near to that. With that cooler you could get pretty dang close if not higher. I'm not an OC expert, though, so maybe someone else could recommend a good cpu for you.