Supermicro X8DTN+-F-LR User Manual page 81

QPI L0s and L1
This feature allows the user to set the QPI power state to a lower setting. L0s
and L1 are automatically selected by the motherboard. The options are Disabled
and Enabled.
Memory Frequency
This feature forces a DDR3 module to run at a frequency other than what the sys-
tem has detected. Select Force SPD (Serial Presence Detect) to force the module
to run at a frequency specifi ed on the SPD table. The available options are Auto,
Force DDR-800, Force DDR-1066, Force DDR-1333 and Force SPD.
Memory Mode
Select Independent to make all DIMMs available to the operating system. Select
Channel Mirroring to maintain two identical copies of all data in Channel 1 and
Channel 2 memory modules for data security. Select Lockstep for the mother-
board to use two areas of memory to run the same set of operations in parallel.
Select Sparing for a preset threshold of correctable errors to be used to trigger
fail-over. The spare memory is put online and used as active memory in place
of the failed memory. This option is supported by Intel 5600 Series processors
only. The options are Independent, Channel Mirroring, and Lockstep.
Demand Scrubbing
Demand Scrubbing is a memory error-correction scheme that allows the proces-
sor to write corrected data back into the memory block from where it was read
by the Processor. The options are Enabled and Disabled.
Patrol Scrubbing
Select Enabled to use Patrol Scrubbing, a memory error-correction scheme that
works in the background to look for and correct errors. The options are Enabled
and Disabled.
Throttling - Closed Loop
Throttling improves reliability and reduces power in the processor by automatic
voltage control during processor idle states. Available options are Disabled and
Enabled. If Enabled, the following items will appear:
Hysteresis Temperature (Available for Closed Loop only)
Temperature Hysteresis is the temperature lag (in degrees Celsius) after
the DIMM temperature threshold is reached before Closed Loop Throttling
begins. The options are Disabled, 1.5
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C, 3.0 C, and 6.0
5-9
Chapter 5: AMI BIOS
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C.