Intel Pentium III User Manual

5-2 Intel
®
Pentium
®
III Processor with 512KB L2 Cache Dual Processor Platform Design Guide
required. For Intel
®
Pentium
®
III Processor with 512KB L2 Cache dual processor designs, the system
designer needs to design beyond the rule of thumb and architect a power distribution system that meets
the processor specifications. Figure 5-1 shows the ideal power model.
Figure 5-2 shows the recommended system baseboard solution involving local voltage regulators. Each
voltage regulator solution can be either a voltage regulator module (VRM) or an embedded voltage
regulator (VRD) depending upon the specific requirements of the board designs. It is recommended that
board designers follow the guidelines in VRM 8.5 DC-DC converter design guidelines document.
Each regulator circuit should be placed as close as possible to the corresponding processor and aligned
to the side of the socket with the higher density of power and ground pins.
In previous generation Pentium® III dual processor based systems, there existed the possibility of
sourcing the combined voltage and current requirements for both processors from one large voltage
regulator. However, due to the load-line characteristics specified by the Intel
®
Pentium
®
III
Processor with 512KB L2 Cache, Intel recommends that separate power planes be utilized.This
configuration of voltage regulators is shown in Figure 5-2.
.
Figure 5-1. Ideal Processor Power Supply Scheme
Figure 5-2. Power Distribution for a DP System Motherboard
Processor
Power
Supply
Voltage Regulator 1
Voltage Regulator 2
Processor 1
Processor 2

Intel Pentium III Specifications

General

Brand	Intel
Model	Pentium III
Category	Computer Hardware
Language	English