Specifications

Product Errata 83
Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors
25759 Rev. 3.79 July 2009
131 Systems May Deadlock Waiting for a Probe Response
Description
Under a highly specific and detailed set of internal timing conditions, the Northbridge System
Request Queue (SRQ) may stall a probe response leading to a deadlock.
Potential Effect on System
Deadlock or a machine check error due to a watchdog timer time-out.
Suggested Workaround
BIOS should set NB_CFG Register[20] (MSR C001_001Fh). No loss of performance results from
this workaround.
Systems implementing the workaround for erratum 169 should not apply this workaround.
Fix Planned
No