Pentium III Katmai 600B

Table 6-54: Pentium III Katmai 450 Specifications
Processor Family	Model Name	Intel Pentium III Katmai

	Performance Rating	600 MHz
	Front-side Bus Speed	133 MHz
	Multiplier Ratio	4.5×
Physical Design	Interface Packing	242-Pin Slot 1 Cartridge
	Core Voltage	2.05 volts
	Power Consumption	23 watts
	Maximum Power	34.5 watts

Table 6-55: Pentium III Katmai 450 Overclocking
Pentium III Katmai	Model Rating	600 MHz

Overclocking Potential	Multiplier Lock Support	Locked Multiplier
	Typical Multiplier O/C	N/A
	Typical Front-side Bus O/C	~ 140 MHz
	Typical O/C Potential	630 – 650 MHz
	Maximum O/C Potential	675+ MHz
Overclocking Tolerances	Recommended Cooling Type	Forced-Air Heatsink
	Recommended Heatsink Coolers	Globalwin VES20
		Alpha P3125
	Recommended Peltier Active Cooler	Swiftech MC1000
		PC-10a Cooler
	Maximum Core Voltage	2.2 volts with Heatsink Cooler
	Maximum I/O Voltage	3.5 volts with Chipset Cooler
	Maximum Core Temperature	80 – 85° Celsius

Strategy

The Pentium III Katmai 600B offers overclocking potential similar to its 533-MHz counterpart. Notice the increase to 2.05 volts for the core voltage rating compared to 2.0 volts for older Katmai models. Intel must have recognized the limitations of its .25-micron fabrication process. A 0.05 volt increase appears minimal, but the reality is that Intel needed the bump in voltage to sustain its sales model at this higher frequency.

The Katmai 600B marked the end of a generation. It was the last .25-micron processor offered by Intel's desktop computing division. Overclocking this model proves difficult beyond 650 MHz; many chips never reach beyond the factory default of 600 MHz at a 2.05 volts core. Due to a peak power demand of 34.5 watts, the Katmai 600B will require massive cooling if overclocking returns exceeding 650 MHz are to be attained. Peltier cooling is a popular solution for this model, but the costs can be prohibitive given the small potential performance gains.