MSI 5520 Master Series, User Manual, Page: 50 / 82

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MS-91C2 Server Board
QPI Frequency
This item allows you to select the QPI frequency.
Memory Frequency
This setting allows you to select the memory frequency.
Memory M ode
This setting specifies the memory mode.
Demand Scrubbing, Patrol Scrubbing
These settings support demand and patrol scrubbing to detect and repair memory
problems. If it encounters a memory problem that cannot be repaired, it marks
the bad location so that it will not be used in the future.
Memory ECC Function
This setting enables/disables ECC (Error Correction Code) checking, a method
of checking the integrity of data in DRAM. ECC provides more elaborate error
detection than parity; ECC can detect multiple-bit errors and can locate and
correct single-bit errors.
NUMA Support
Non-Uniform Memory Access (NUMA) is designed to increase processor speed
without increasing the load on the processor bus. The architecture is non-
uniform because each processor is close to some parts of memory and farther
from other parts of memory. The processor quickly gains access to the memory
it is close to, while it can take longer to gain access to memory that is farther
away. In a NUMA system, CPUs are arranged in smaller systems called nodes.
Each node has its own processors and memory, and is connected to the larger
system through a cache-coherent interconnect bus.
NOTE: To support NUMA, users need to build SRAT table, enable ACPI
2.0 or 3.0 support, and set Memory Mode to [Lockstep].
Adaptive Page Support
This setting enables/disables the support for a virtual memory page replace-
ment algorithm.
Page Policy
This setting specifies the memory page policy.
Split below 4G
This setting determines whether to split below 4G memory or not.
Data Scramble
This setting enables/disables the data scramble function.
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