I'm running the retail hsf on my 1100, if the heat sink fails this summer in warmer temps theres the amd warrenty so you dont have to worry as much. since im not overclocking im just gona use the retail so i say it'll be good enuf thou i am tempted to fire up a beter fan like a ys on it thou. cause it's got a 15mm fan and would prefer a 25mm fan more efficient and quiter.