User`s manual

Chapter 5: Running Setup
5-9
Memory Autosizing Support
The dynamic detection and sizing of SDRAM and EDO is performed by the
BIOS in a system populated with memory which has no SPD information.
When set to Enable , memory does not have the SPD information. The
settings for this option are Auto or Enable .
DRAM Integrity Mode
The settings for this option are None , EC or ECC Hardware . Note: For
ECC memory only. See the table below to set the type of system
memory checking. (Note: New BIOS versions automatically detect
setting and do not need to be set by user.)
Setting Description
None No error checking or error reporting is done.
EC Multibit errors are detected and reported as parity
errors. Single-bit errors are corrected by the
chipset. Corrected bits of data from memory are
not written back to DRAM system memory.
ECC Multibit errors are detected and reported as parity
Hardware errors. Single-bit errors are corrected by the
chipset and are written back to DRAM system
memory. If a soft (correctable) error occurs,
writing the fixed data back to DRAM system
memory will resolve the problem. Most DRAM
errors are soft errors. If a hard
(uncorrectable) error occurs, writing the fixed
data back to DRAM system memory does not
solve the problem. In this case, the second time
the error occurs in the same location, a Parity
Error is reported, indicating an uncorrectable
error. If ECC is selected, AMIBIOS automatically
enables the System Management Interface (SMI).
If you do not want to enable power management,
set the Power Management/APM option to
Disabled and set all Power Management Setup
timeout options to Disabled . To enable power
management, set Power Management/APM to
Enabled and set the power management timeout
options as desired.