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DIMM Configuration
Current Memory Mode
: This item displays the current memory mode
Current Memory Mode
: This item displays the current memory mode
Mirroring: This item displays if memory mirroring is supported by the serverboard
Sparing: This item displays if memory sparing can be supported by the serverboard
DIMM information
The status of the memory modules detected by the BIOS will be displayed
.
Memory Mode
When Independent is selected, all DIMMs will be available to the operating system.
When Mirroring is selected, the serverboard maintains two identical copies of all data
in memory for data backup. When Lockstep is selected, the serverboard uses two areas
of memory to run the same set of operations in parallel. The options are Independent,
Mirroring, Lockstep and Sparing.
DRAM RAPL (Running Average Power Limit) Mode
RAPL which stands for Running Average Power Limit is a feature that provides
mechanisms to enforce power consumption limits on supported processors The options
are DRAM RAPL MODE0, DRAM RAPL MODE1, and Disabled
.
DDR Speed
Use this feature to force a DDR3 memory module to run at a frequency other than what
the system is specified in the specification. The options are Auto, Force DDR3 800,
Force DDR3 1066, Force DDR3 1333, Force DDR3 1600 and Force SPD.
Channel Interleaving
This feature selects from the different channel interleaving methods. The options are
Auto, 1 Way, 2 Way, 3, Way, and 4 Way.
Rank Interleaving
This feature allows the user to select a rank memory interleaving method. The options
are Auto, 1 Way, 2 Way, 4, Way, and 8 Way.
Patrol Scrub
Patrol Scrubbing is a process that allows the CPU to correct correctable memory errors
detected on a memory module and send the correction to the requestor (the original
source). When this item is set to Enabled, 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, roughly 64 GB of memory behind the IO hub will be scrubbed every
day. The options are Enabled and Disabled.
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 Enabled to use Demand Scrubbing for ECC memory correction. The options are
Enabled and Disabled.
Chapter 7. BIOS
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