Ok i just built a new computer! (I'm on it now), and wondering it this is a good fan speed and temperature on my CPU, i used Speedfan, because at first the speed was at 6500rpm, and reaaally loud, it hurt my ears! (I use amd phenom II x4 955BE stock cooler.) I put the fan to 35% and now it's really quiet. The speed is now at 3500rpm and the temperature is at 43-45 celsius. Is that good? (for stock cooler.) Oh and now i can actually hear the case fans.