I noticed this previously, got a can of air and blew the dust out of the cpu fan. That resolved it for me. Unfortunately, I have to repeat the process about every 2 or 3 months. Most newer cpu's run hot and need good air circulation. I've actually got 4 case fans, but if I don't keep the cpu fan clean it still runs hot. I've considered getting a larger heat sink/fan for the cpu, but the system needs a good dusting anyway. Cecil
