On Wed, 2010-06-02 at 19:34 +0300, Maxim Levitsky wrote: > On Mon, 2010-05-31 at 09:39 +0800, Huaxu Wan wrote: > > On 08:39 Sat 29 May, Maxim Levitsky wrote: > > > On Fri, 2010-05-07 at 17:59 +0800, Huaxu Wan wrote: > > > > The MSR IA32_TEMPERATURE_TARGET contains the TjMax value in the newer > > > > processers. > > > > > > I know that TjMax on my system is 85, and now coretemp reports wrong > > > temperatures. > > > First of all BIOS using stupid tricks actualy reports CPU temperature > > > through ACPI, and assuming it was correct TjMax is 85. > > > It also shuts down the system if I 'lie' to it that cpu temperature is > > > 85C. > > > > From the list at [1], the TjMax(Tjunction) of T5450 is 100C. Does anyone > > here can make a double check? > > > > [1] http://ark.intel.com/Product.aspx?id=30787&processor=T5450&spec-codes=SLA4F > > This is very interesting. > > With TjMax 85C, the CPUs idle temperature is reported at around 45~50C > GPU temperature that is around 60C > > BIOS also reports 45~50C. > > BIOS hooks an SMI to CPU thermal report, and stores the temperature it > read in ram, then ACPI code reads it, reports and passes to the EC > (embedded controller). > > If I write myself 85 to embedded controller, systems shuts down. > (values less that 85, eg 84 don't shut system). Another clue is that right after resume from ram, after long delay (~hour) the displayed temperature with TjMax 85 is 33C. Since room temperature here is around 27C, this seems more plausible that 33 + 15 = 48C Best regards, Maxim Levitsky _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
