There are things called heat sinks. I have found that you don't need it when it is running at 300MHz (I forgot to put it back on once) and it was fine. I put the heat sink back on and it is still fine. I did have my 300MHz clamshell running at 433MHz and it was fine for about a year until it was killed by lightning. And I have not (or never will) OC the mobo I bought off ebay. For what I use it for now there is no need.