User's Manual

Memory Configuration Parameters
DescriptionName
How the memory reliability, availability, and serviceability
(RAS) is configured for the server. This can be one of the
following:
• —System performance is optimized.
• Mirroring—System reliability is optimized by using half
the system memory as backup.
• Lockstep—If the DIMM pairs in the server have an
identical type, size, and organization and are populated
across the SMI channels, you can enable lockstep mode
to minimize memory access latency and provide better
performance. This option offers better system performance
than Mirroring and better reliability than Maximum
Performance but lower reliability than Mirroring and lower
system performance than Maximum Performance.
Select Memory RAS
Allows you to determine whether memory bandwidth or system
performance is more important on this server. This can be one
of the following:
• Balanced— DRAM clock throttling is reduced, providing
a balance between performance and power.
• Performance—DRAM clock throttling is disabled,
providing increased memory bandwidth at the cost of
additional power.
• —DRAM clock throttling is increased to improve energy
efficiency.
DRAM Clock Throttling
Whether the BIOS supports NUMA. This can be one of the
following:
• Disabled—The BIOS does not support NUMA.
• Enabled—The BIOS includes the ACPI tables that are
required for NUMA-aware operating systems. If you
enable this option, the system must disable Inter-Socket
Memory interleaving on some platforms.
NUMA
Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
242 OL-28893-01
BIOS Parameters by Server Model
Advanced BIOS Parameters for C420 Servers