IBM NeXtScale System Planning And Implementation Manual page 188

Efficiency - Favor Performance
Figure 7-9 shows the Efficiency - Favor Performance predetermined values. They
emphasize performance server operation by setting the processors, QPI link, and
memory subsystem to a high working frequency.
Figure 7-9 UEFI operation mode: Efficiency - Favor Performance
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IBM NeXtScale System Planning and Implementation Guide