Specifications

Product Errata 75
Revision Guide for AMD Athlon™ 64 and AMD Opteron™ Processors
25759 Rev. 3.79 July 2009
115 Data Corruption with Mismatched DIMM Support on
939 Packages
Description
The mismatched DIMM support feature can cause floating DQS pins on the DDR SDRAM interface.
Potential Effect on System
Data corruption occurs during DRAM reads when switching from the upper 64-bit memory interface
to the lower 64 bits, or vice-versa.
The mismatched DIMM feature applies to 939 packages only.
Suggested Workaround
Do not set Dev:2x90[6] to enable mismatched DIMM support.
Fix Planned
Yes