Specifications

144 Product Errata
41322 Rev. 3.84 August 2011
Revision Guide for AMD Family 10h Processors
643 Processor May Increment CPU Watchdog Timer at an Incorrect
Rate
Description
The rate at which the CPU watchdog timer counter increments may be significantly higher than the
rate specified in the CPU Watchdog Timer Register[CpuWdtCountSel, CpuWdtCountBase]
(MSRC001_0074[6:3 and 2:1]).
Potential Effect on System
The CPU watchdog timer, if enabled, may report a machine check earlier than the northbridge
watchdog timer, possibly leading to incorrect failure analysis on the cause of a hang. While the CPU
watchdog timer may expire at a faster rate, the increased rate is not expected to lead to a false
machine check.
Suggested Workaround
BIOS should not enable the CPU watchdog timer. MSRC001_0074[CpuWdtEn, bit 0] should remain
at its reset value of 0b.
Fix Planned
No