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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 Figure 6-1. 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.

Features

94 Dual-Core Intel® Xeon® Processor 3000 Series Datasheet

The following are key features of Enhanced Intel SpeedStep

Technology:

• Multiple voltage/frequency operating points provide optimal performance at

reduced power consumption.

• Voltage/frequency selection is software controlled by writing to processor MSRs

(Model Specific Registers), thus eliminating chipset dependency.

— If the target frequency is higher than the current frequency, V

is incremented

in steps (+12.5 mV) by placing a new value on the VID signals and the

processor shifts to the new frequency. Note that the top frequency for the

processor can not be exceeded.

— If the target frequency is lower than the current frequency, the processor shifts

to the new frequency and V

is then decremented in steps (-12.5 mV) by

changing the target VID through the VID signals.

Dual-Core Intel® Xeon® Processor 3000 Series Datasheet 95

Boxed Processor Specifications

7 Boxed Processor Specifications

The processor is also offered as an Intel boxed processor. Intel boxed processors are

intended for system integrators who build systems from baseboards and standard

components. The boxed processor will be supplied with a cooling solution. This chapter

documents baseboard and system requirements for the cooling solution that will be

supplied with the boxed processor. This chapter is particularly important for OEMs that

manufacture baseboards for system integrators. Figure 7-1 shows a mechanical

representation of a boxed processor.

Note: Unless otherwise noted, all figures in this chapter are dimensioned in millimeters and

inches [in brackets].

Note: Drawings in this section reflect only the specifications on the Intel boxed processor

product. These dimensions should not be used as a generic keep-out zone for all

cooling solutions. It is the system designers’ responsibility to consider their proprietary

cooling solution when designing to the required keep-out zone on their system

platforms and chassis. Refer to the Dual-Core Intel

Xeon

Processor 3000 Series

Thermal and Mechanical Design Guidelines for further guidance.

Note: The airflow of the fan heatsink is into the center and out of the sides of the fan heatsink.

Figure 7-1. Mechanical Representation of the Boxed Processor

Part #	3000
Description	DUP RCPT PORTABLE OUTLET BX
Category	LED
Availability	Out of Stock
Qty	0

3000

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