Hi all, I just purchased my first Mac computer and I was shocked to see the results of a stress test. I get a maximum temperature of 103C on the core diodes for my P7570 (apparently the OEM version of the P8400) before the fan starts to rev up (about 1-2 minutes). This effect is the same in both Windows 7 RC1 (64-bit) and Snow Leopard. Once the fans have started to reach ~4000 RPM the temperatures stabilize at ~90C. As the maximum diode temperature for the CPU is 105C I don't think this is a desired behavior. Ironically, even with such a high diode temperature, the notebook is not hot to touch and all other temperatures are fine (CPU temperature reaches a maximum of 84C). If I force the fan speed with smcFanControl this doesn't happen. Does anyone else have this issue with this system? I guess I need a system update to get the fan to respond quicker, but Apple will only do that if there is an issue for many people. If it is just me then I had better send the system back for replacement. Thanks for your help!