On Mon, Apr 30, 2007 at 10:08:00PM +0200, Joel CARNAT wrote: > my question is: how can one explain this ~10°C difference ? Nit-picking: the difference is 10K. I don't think we actively use the C stepping of the CPU, nor we use the ACPI CPU PM functions. Both can make quite a difference, esp. on an unloaded box. Joerg