Specifications

60 Product Errata
25759 Rev. 3.79 July 2009
Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors
99 Background Scrubbing Must Be Disabled With
Non-Contiguous Memory Map
Description
On some systems, BIOS remaps part of system DRAM above the 4 Gbyte boundary for purposes of
reclaiming memory lost to memory-mapped I/O resources. This results in a non-contiguous memory
map. The background DRAM scrubber fails when it encounters an area of remapped memory,
causing a system deadlock.
Potential Effect on System
System deadlock when background scrubber is enabled.
Suggested Workaround
Do not enable background scrubbing when the memory map is non-contiguous and a DIMM
connected to chip select 0 is unpopulated.
Fix Planned
Yes