Dell PowerEdge M620 Owner's Manual page 142

Option
Logical Processor
(Enabled default)
Virtualization
Technology (Disabled
default)
DMA Virtualization
(M915 only)
(Disabled default)
DRAM Prefetcher
(M915 only)
(Enabled default)
Adjacent Cache Line
Prefetch
(Enabled default)
Hardware Prefetch
Training on Software
Prefetch (M915 only)
(Enabled default)
Hardware Prefetcher
(Enabled default)
DCU Streamer
Prefetcher
(Enabled default)
Data Reuse
Execute Disable
(Enabled default)
Number of Cores per
Processor
(All default)
142
Using the System Setup Program and UEFI Boot Manager
Description
If set to Enabled, both logical processors per processor core
are enabled. If set to Disabled, only one logical processor
per core is enabled.
NOTE:
Disable this feature if your system does not run
virtualization software.
Displays when the processors support Virtualization
Technology. Enabled permits virtualization software to use
Virtualization Technology incorporated in the processor
design. This feature can only be used by software that
supports Virtualization Technology.
If set to enabled, additional hardware capabilities for DMA
remapping and virtualization are available.
Turns on or off the DRAM prefetch unit in the Northbridge.
Enable or disables system optimization for sequential
memory access.
If set to Enabled, the hardware prefetcher includes software
prefetches when the system detects strides for prefetch
requests.
Enables or disables the hardware prefetcher.
Enables or disables DCU streamer prefetcher.
Enables or disables data reuse in cache.
When set to Enabled, Execute Disable Memory Protection
Technology is enabled.
If set to All, all cores in each processor are enabled.