no, not a problem per se. even though it does not cover the whole metal integrated heat-spreader of the cpu, it does cover the actual chip which is where most of the action is. its not a top-performing cooler so you are not going to do any aggressive overclocking with it, but the fact that it doesn't cover the IHS fully is not a concern in-and-of itself. I have one on my unlocked 550 at stock clocks which is about as hot as yours and cpu temps are fine.