Supermicro X9DB3-F User Manual download pdf (Page 85)

Chapter 4: AMI BIOS

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two areas of memory to run the same set of operations in parallel. When Spar-

ing is selected, memory that is inactive or not in use will be enabled to take the

place of a failed memory component. Sparing is available only when two DIMM

modules are installed in the same channel. The options are Independent, Mir-

roring, Lock Step and Sparing.

DRAM RAPL Mode

RAPL (Running Average Power Limit) 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 is specied by the manufacturer. 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, 4 Way and 8 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.

Data Scrambling

Select Enabled to enable data scrambling to ensure data security and integrity.

The options are Disabled and Enabled.

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Supermicro X9DB3-F User Manual Page 85