Intel L3426 BV80605004737AA Data Sheet

Product codes
BV80605004737AA
Page of 102
Dual-Core Intel® Xeon® Processor 3000 Series Datasheet
93
Features
6.3
Enhanced Intel
®
 SpeedStep
®
 Technology
The processor supports Enhanced Intel SpeedStep
® 
Technology. This technology 
enables the processor to switch between multiple frequency and voltage points, which 
results in platform power savings. Enhanced Intel SpeedStep
 
Technology requires 
support for dynamic VID transitions in the platform. Switching between voltage/
frequency states is software controlled. 
Note:
Not all processors are capable of supporting Enhanced Intel SpeedStep
®
 Technology. 
More details on which processor frequencies support this feature is provided in the 
Dual-Core Intel
®
 Xeon
®
 Processor 3000 Series Specification Update.
Enhanced Intel SpeedStep
®
 Technology creates processor performance states 
(P-states) or voltage/frequency operating points. P-states are lower power capability 
states within the Normal state as shown in 
. Enhanced Intel SpeedStep
®
 
Technology enables real-time dynamic switching between frequency and voltage 
points. It alters the performance of the processor by changing the bus to core 
frequency ratio and voltage. This allows the processor to run at different core 
frequencies and voltages to best serve the performance and power requirements of the 
processor and system. The processor has hardware logic that coordinates the 
requested voltage (VID) between the processor cores. The highest voltage that is 
requested for either of the processor cores is selected for that processor package. Note 
that the front side bus is not altered; only the internal core frequency is changed. To 
run at reduced power consumption, the voltage is altered in step with the bus ratio.