Chapter 6: BIOS
85
Memory Topology
This item displays the information of onboard memory modules as detected by the BIOS.
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P1 DIMMA1
•
P1 DIMMB1
•
P2 DIMMA1
•
P2 DIMMB1
Memory RAS (Reliability_Availability_Serviceability) Configuration
Use this submenu to configure the following Memory RAS settings.
Static Virtual Lockstep Mode
Select Enable to support Static Virtual Lockstep mode to enhance memory performance.
The options are Enable and
Disable
.
Mirror Mode
Select Enable to set all 1LM/2LM memory installed in the system on the mirror mode, which
will create a duplicate copy of data stored in the memory to increase memory security, but
it will reduce the memory capacity into half. The options are Enable and
Disable
.
Memory Rank Sparing
Select Enable to support memory-rank sparing to optimize memory performance. The
options are Enable and
Disable
.
Note:
This item will not be available when memory mirror mode is enabled.
Memory Correctable Error Threshold
Use this item to enter the threshold value for correctable memory errors. The default setting
is 10.
SDDC
Select Enable for SDDC (Single Device Data Correction) support, which will increase the
reliability and serviceability of your system memory. The options are Enable and
Disable
.
ADDDC (Adaptive Double Device Data Correction) Sparing
Select Enable for ADDDC sparing support to enhance memory performance. The options
are Enable and
Disable
.
Patrol Scrub
Patrol Scrubbing is a process that allows the CPU to correct correctable memory errors
detected in a memory module and send the corrections to the requestor (the original
source). When this item is set to Enable, the IO hub will read and write back one cache line
every 16K cycles if there is no delay caused by internal processing. By using this method,
