Supermicro Supero X8DAH+-F User Manual page 75

Chapter 4: AMI BIOS
QPI Frequency
This selects the desired QPI frequency. The options are Auto, 4.800 GT, 5.866GT,
6.400 GT.
QPI L0s and L1
This feature allows QPI to use lower power settings. L0s and L1 are automatically
selected by the motherboard. The options are Disabled and Enabled.
Memory Frequency
This feature allows the user to force DDR3 memory to run at a frequency different
from what is specified. The available options are Auto, Force DDR-800, Force
DDR-1066, Force DDR-1333, and Force SPD.
Memory Mode
The options are Independent, Channel Mirror, Lockstep, and Sparing.
Independent - All DIMMs are available to the operating system.
Channel Mirror - The motherboard maintains two identical copies of all data in
Channel 1 and Channel 2 memory for redundancy.
Lockstep - The motherboard uses two areas of memory to run the same set of
operations in parallel.
Sparing - A preset threshold of correctable errors is 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.
Demand Scrubbing
This is a memory error-correction scheme where the processor writes corrected data
back into the memory block from where it was read by the Processor. The options
are Enabled and Disabled.
Patrol Scrubbing
This is a memory error-correction scheme that works in the background looking for
and correcting resident errors. The options are Enabled and Disabled.
Throttling - Closed Loop
Throttling improves reliability and reduces power in the processor by automatic volt-
age control during processor idle states. The options are Disabled and Enabled.
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