I've had my unlocked X2 555 running with the stock heat sink for a few weeks now without any real heat issues. Unfortunately, that's changed, it's spring time now and that means the weather is warmer (75F right now) and so is my CPU. After exiting from a session of Counter-Strike Source, I noticed my CPU fan running louder than usual. I went into the bios and found it spinning pretty hard, fluctuating to about 4600 RPM max, while my CPU temp reached a high of 49C. I do believe that I'm going to need an aftermarket cooler. Should I be worried right now? If so, can someone recommend a good aftermarket CPU cooler that isn't too monstrous and that will be compatible with my AM3 motherboard (Asus M4A785TD-M EVO to be exact).