Cisco Systems UCSCPCIEBTG, 57712 manual 210

BIOS Parameters by Server Model

Advanced BIOS Parameters for C220 and C240 Servers

Memory Configuration Parameters
Name	Description
Select Memory RAS	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.
DRAM Clock Throttling	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.
NUMA	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.

	Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
210	OL-28893-01