Chapter 7: BIOS
7-17
Leaky Bucket High Bit
Use this feature to set the High Bit value for the Leaky Bucket algorithm which
is used to check the data transmissions between CPU sockets and the memory
controller. The default setting is
41
.
Memory Interleaving
Use this feature to set the DIMM memory interleaving mood. The options are
NUMA (1-way) Node Interleave, 2-way Node Interleave, 4-way Interleave, 8 Way
Interleaving, Inter-socket, and
Auto
.
Socket Interleave Below 4GB
Select Enabled for the memory above the 4G Address space to be split between
two sockets. The options are Enable and
Disable
.
Channel Interleaving
Use this feature to set the DIMM channel interleaving mood. The options are
Auto
,
1-Way Interleave, 2-Way Interleave, 3-Way Interleave, and 4-Way Interleave.
Rank Interleaving
Use this feature to select a rank memory interleaving method. The options are
Auto
,
1-Way, 2-Way, 4-Way, and 8-Way.
Demand Scrub
Demand Scrubbing is a process that allows the CPU to correct correctable memory
errors found on a memory module. When the CPU or I/O issues a demand-read
command, and the read data from memory turns out to be a correctable error, the
error is corrected and sent to the requestor (the original source). Memory is updated
as well. Select Enable to use Demand Scrubbing for ECC memory correction. The
options are
Enable
and Disable.
Device Tagging
Select Enable to support device tagging. The options are
Disable
and Enable.
A7 Mode
Select Enabled to support A7 (Addressing) Mode to improve memory performance.
The options are
Disable
and Enable.
DDDC Support
Select Enabled to enable Double-Device Data Correction (DDDC) support for the
error-correction codes to correct memory errors caused by two failed DRAM devices.
The options are
Disabled
and Enabled.
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