Well, I have exactly the same problem as stephenace, and I'm really ready to suspect that the AMD stock cooler is the problem here... It was installed, together with my AMD Athlon XP 2400+ on another motherboard, which was so unstable and crappy, that I decided to by an ASUS A7V600... So, I removed what remained of the thermal glue off of the CPU and heatsink, and installed it on my brand new beautiful motherboard.. The entire thing runs darn fine and stable, it's just that those temps definitely worry me.. Indeed, my CPU easily climbs to sixty degrees, just being idle, and whenever I play a game or do any CPU stressing activities, it may even rise to a whopping 68 degrees.. I constantly watch the temps with ASUSProbe and I cannot help but worry.. I bought a cheaper cooler just yesterday, but I think this one is even crappier because it seems to make the CPU heat even more.. By the way, I also used Artic Silver, this couldn't have an overheating effect on the CPU, right?? The airflow in my casing is perfect, because it is the same one as before, and on my crappy motherboard, my CPU used to be turning at 45 degrees max. when stressed.. What do you consider to be viable options??