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Chapter 7: BIOS
DIMM Information
CPU Socket 1 DIMM Information, CPU Socket 2 DIMM Information
The status of the memory modules is displayed as detected by the BIOS.
Memory Mode
When Independent is selected, all DIMMs are available to the operating system.
When Mirroring is selected, the motherboard maintains two identical copies of all
data in memory for data backup. When Lock Step is selected, the motherboard
uses two areas of memory to run the same set of operations in parallel. The
default setting is Independent.
DRAM RAPL Mode
RAPL (Running Average Power Limit) provides mechanisms to enforce power
consumption limits on supported processors The options are Disabled, DRAM
RAPL MODE0, and DRAM RAPL MODE1.
Memory Energy/Performance
Use this feature to select a memory setting that maximizes either memory per-
formance or memory energy saving. The options are Performance and Energy
Saving.
DDR Speed
Use this feature to force a DDR3 memory module to run at a frequency other than
what is specified in the specification. The options are Force DDR3-800, Force
DDR3-1066, Force DDR3-1333, Force DDR3-1600 and Force SPD, and Auto.
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.
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