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Chapter 7: BIOS
7-9
• Memory Reference Code: This item displays the memory reference code for
the motherboard.
• QPI Reference Code: This item displays the QPI reference code for the moth-
erboard.
QPI (Quick Path Interconnect) Links Speed
QuickPath Interconnect (QPI) is the connection between the CPU and the
motherboard's I/O hub. Use this feature to set data transfer speed for QPI Link
connections. The options are Slow-Mode, and Full Speed.
QPI Frequency (Available if the item - QPI Link Speed is set to Full
Speed)
This feature allows the user to select the desired QPI frequency. The options
are Auto, 4.800 GT, 5.866GT, 6.400 GT.
QPI L0s and L1
This feature allows the user to set the QPI power state to a low 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
If this item is set to Independent, all DIMMs are available to the operating system.
If this item is set to Channel Mirroring, the motherboard maintains two identical
copies of all data in memory for redundancy. If this item is set to Lockstep, the
motherboard uses two areas of memory to run the same set of operations in
parallel. The options are Independent, Channel Mirroring, and Lockstep.
Demand Scrubbing
This is a memory error-correction scheme when 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.