Supermicro SuperO X8DTL-3 User Manual page 71

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 enables the QPI power state to low power. L0s and L1 are automatically
selected by the motherboard. The options are Enabled and Disabled.
Memory Frequency
This feature forces a DDR3 memory module to run at a specifi c frequency.
The available options are Auto, Force DDR-800, Force DDR-1066, and Force
DDR-1333.
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
memory for redundancy.
Lockstep - The motherboard uses two areas of memory to run the same set of
operations in parallel.
Demand Scrubbing
It is a memory error-correction scheme in which 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
It 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 - Open 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 (Closed Loop only)
Temperature Hysteresis is the temperature lag (in degrees Celsius) after the set
DIMM temperature threshold is reached before Closed Loop Throttling begins.
The options are Disabled, 1.5 o C, 3.0
o o
C, and 6.0 C.
4-9
Chapter 4: AMI BIOS