Specifications

102 Product Errata
41322 Rev. 3.84 August 2011
Revision Guide for AMD Family 10h Processors
379 DDR3-1333 Configurations with Two DIMMs per Channel May
Experience Unreliable Operation
Description
In systems with more than one DDR3-1333 unbuffered DIMM on a channel, the processor memory
subsystem may exhibit unreliable operation over the allowable VDDIO voltage range.
This erratum does not apply to DDR3-1333 configurations when only one DIMM per channel is
populated.
Potential Effect on System
Memory system failure leading to unpredictable system behavior.
Suggested Workaround
In a configuration where two unbuffered DDR3-1333 DIMMs are populated on one channel, BIOS
should derate DDR3-1333 system memory to 533 MHz operation (DDR3-1066) by setting the
DRAM Configuration High Register[MemClkFreq] (F2x[1, 0]94[2:0]) to 100b and adjusting
memory subsystem timing parameters accordingly.
Fix Planned
Yes