Dell Power Supply C8000 Owner's Manual page 90

Option
C7 State
(Enabled default)
XD Bit Capability
(Enabled default)
Direct Cache Access
(Enabled default)
Hyper-Threading
Technology
(Enabled default)
Prefetch Configuration
90
Using the System Setup Program
Description
Enables or disables the processor C7 state.
NOTE:
This feature is available when the processor supports
C7 state.
NOTE:
Disable this option at your own risk. When you disable
this option, a pop up message appears on the screen and
warning appears in the System Setup Help.
Enables or disables the processor's Execute Disable (XD)
Memory Protection Technology feature.
Enables or disables the direct cache access.
Enables or disables the Hyper-Threading technology.
Press <Enter> to configure the prefetch settings.
NOTE:
This feature is available when supported by the
processor.