AMD Phenom 8450 Triple-Core HD8450WCGHBOX User Manual
Product codes
HD8450WCGHBOX
Product Errata
47
Revision Guide for AMD Family 10h Processors
41322
Rev. 3.16
February 2008
319 Inaccurate Temperature Measurement
Description
The internal thermal sensor used for CurTmp (F3xA4[31:21]), hardware thermal control (HTC),
software thermal control (STC), and the sideband temperature sensor interface (SB-TSI) may report
inconsistent values.
software thermal control (STC), and the sideband temperature sensor interface (SB-TSI) may report
inconsistent values.
Potential Effect on System
HTC, STC and SB-TSI do not provide reliable thermal protection. This does not affect THERMTRIP.
Suggested Workaround
None. Systems should be designed with conventional thermal control and throttling methods or
utilize PROCHOT_L functionality based on temperature measurements from an analog thermal diode
(THERMDA/THERMDC).
utilize PROCHOT_L functionality based on temperature measurements from an analog thermal diode
(THERMDA/THERMDC).
Systems should not rely on the HTC features, STC features or use SB-TSI.
Software should not modify HtcTmpLmt (F3x64[22:16]) or enable any of the STC features by setting
StcPstateEn, StcApcTmpLoEn, StcApcTmpHiEn, StcSbcTmpLoEn, or StcSpcTmpHiEn
(F3x68[5,3:0]).
StcPstateEn, StcApcTmpLoEn, StcApcTmpHiEn, StcSbcTmpLoEn, or StcSpcTmpHiEn
(F3x68[5,3:0]).
Fix Planned
Yes