NEC Intel Xeon E5-2430 N8101-572F User Manual
Product codes
N8101-572F
Intel® Xeon® Processor E5-1600/E5-2600/E5-4600 Product Families
83
Datasheet Volume One
Technologies
3.2.4
Execute Disable Bit
Intel's Execute Disable Bit functionality can help prevent certain classes of malicious
buffer overflow attacks when combined with a supporting operating system.
• Allows the processor to classify areas in memory by where application code can
execute and where it cannot.
• When a malicious worm attempts to insert code in the buffer, the processor
disables code execution, preventing damage and worm propagation.
3.3
Intel® Hyper-Threading Technology
http://www.intel.com/products/ht/hyperthreading_more.htm
.
3.4
Intel® Turbo Boost Technology
Intel® Turbo Boost Technology is a feature that allows the processor to
opportunistically and automatically run faster than its rated operating frequency if it is
operating below power, temperature, and current limits. The result is increased
performance in multi-threaded and single threaded workloads. It should be enabled in
performance in multi-threaded and single threaded workloads. It should be enabled in
the BIOS for the processor to operate with maximum performance.
3.4.1
Intel® Turbo Boost Operating Frequency
The processor’s rated frequency assumes that all execution cores are running an
application at the thermal design power (TDP). However, under typical operation, not
application at the thermal design power (TDP). However, under typical operation, not
all cores are active. Therefore most applications are consuming less than the TDP at the
rated frequency. To take advantage of the available TDP headroom, the active cores can
increase their operating frequency.
increase their operating frequency.
To determine the highest performance frequency amongst active cores, the processor
takes the following into consideration:
• The number of cores operating in the C0 state.
• The estimated current consumption.
• The estimated power consumption.
• The die temperature.
• The estimated current consumption.
• The estimated power consumption.
• The die temperature.
Any of these factors can affect the maximum frequency for a given workload. If the
power, current, or thermal limit is reached, the processor will automatically reduce the
power, current, or thermal limit is reached, the processor will automatically reduce the
frequency to stay with its TDP limit.
Note:
Intel Turbo Boost Technology is only active if the operating system is requesting the P0
state. For more information on P-states and C-states refer to
.