Pentium 4 Northwood 1800A

Table 6-139: Pentium 4 Northwood 1800A Specifications
Processor Family	Model Name	Intel Pentium 4 Northwood

	Performance Rating	1800 MHz
	Front-side Bus Speed	400 QDR (4 × 100 MHz)
	Multiplier Ratio	18.0×
Physical Design	Interface Packing	478-Pin PGA
	Core Voltage	1.5v
	Power Consumption	41.6 watts
	Maximum Power	54 watts

Table 6-140: Pentium 4 Northwood 1800A Overclocking
Pentium 4 Willamette	Model Rating	1800 MHz

Overclocking Potential	Multiplier Lock Support	Locked Multiplier
	Typical Multiplier O/C	N/A
	Typical Front-side Bus O/C	532 QDR
		(133 MHz)
	Typical O/C Potential	2400 MHz
	Maximum O/C Potential	2800+ MHz
Overclocking Tolerances	Recommended Cooling Type	Forced-Air Heatsink
	Recommended Heatsink Coolers	Swiftech MCX-478
	Maximum Core Voltage	1.75v with Extreme Cooling
	Maximum I/O Voltage	3.5v with Chipset Cooler
	Maximum Core Temperature	67° Celsius

Strategy

The P4 1800A tends to be less popular than the 1600A (157 overclocking submissions at Overclockers.com, for comparison sake) since it is slightly more expensive than the 1600A without offering many additional advantages. Stock cooling and the default 1.50v voltage will likely get you to 2400 MHz with a 133-MHz bus speed, though once again you may need 1.60v or 1.65v to improve stability. There is one advantage that the 1800A offers over the 1600A: you can run at 2400 MHz with a lower 133-MHz bus rather than a 150-MHz bus, thanks to the 18.0× multiplier on the 1800A.