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Chapter 5: AMI BIOS
MMIOH (Memory Mapped IOH) Size Per IOH (IO_Hub)
This item sets Memory Mapped IOH size for each IOH. The options are 2G, 4G
and 6G.
Logical Interrupt Mode
This item allows the user to select the setting for Logical Interrupt Mode. The op-
tions are Flat Mode, and Cluster Mode.
Cluster Mode Check Sampling
If this item is set to Enabled, APICID in the IntPriUpd message will check non-zero
items. The options are Err/Warn/Info0/1 (Error/Warning/Information 0/1), Err/
Warn/Info0 (Error/Warning/Information 0) and Err/Warn (Error/Warning).
QPI (Quick Path Interconnect) Debug Message Output Level
This item allows the user to decide the level that a QPI debug message will dis-
play.
CRC (Cyclic Redundancy Check) Mode
CRC or Polynomial Code Checksum is designed to detect accidental changes
made to raw computer data in networks, storage devices and HDDs. This feature
allows the user to select the CRC Mode. The options are 8bit CRC and 16bit Roll-
ing CRC.
QPI (Quick Path Interconnect) Links Speed
QuickPath Interconnect (QPI) is the connection between the CPU and the mother-
board's I/O hub. Use this feature to modify data transfer speed for QPI Link con-
nections. The options are Slow-Mode, and Full Speed.
QPI Frequency Select (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 Scrambling
Select Enabled to enable QPI Scrambling support. The options are Enabled and
Disabled.
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