Hacking the Slot 1 Interface
Pentium 4 Willamette
Table 6-122: Pentium 4 Willamette 1400 Specifications
Processor Family Model Name Intel Pentium 4 Willamette
Performance Rating 1400 MHz
Front-side Bus Speed 400 QDR (4 × 100 MHz)
Multiplier Ratio 14.0×
Physical Design Interface Packing 423-Pin PGA
478-Pin PGA
Core Voltage 1.7 – 1.75 volts
Power Consumption 55.3 watts
Maximum Power 74 watts
Table 6-123: Pentium 4 Willamette 1400 Overclocking
Pentium 4 Willamette Model Rating 1400 MHz
Overclocking Potential Multiplier Lock Support Locked Multiplier
Typical Multiplier O/C N/A
Typical Front-side Bus O/C 440 – 480 QDR
(110 – 120 MHz)
Typical O/C Potential 1540 – 1680 MHz
Maximum O/C Potential 1700 – 1800 MHz
Overclocking
Tolerances Recommended Cooling Type Forced-Air Heatsink
Recommended Heatsink
Coolers Zalman CNPS-5000
Swiftech MCX-478
Maximum Core Voltage
2.1 volts with Extreme Cooling
Maximum I/O Voltage 3.5 volts with Chipset Cooler Maximum Core Temperature 70° Celsius
Strategy
The Pentium 4 1400-MHz processor suffered a fate similar to its 1300-MHz sibling in the overclocking community. Again, Intel failed to deliver significant performance gains over existing Pentium III and Athlon models in most consumer-oriented software performance testing. Overclocking returns did improve, but the imposed
thermal limitation of 70° Celsius mandates installation of a quality cooling solution for those seeking returns in excess of 1700 MHz.
Pentium 4 Willamette 1500
Table 6-124: Pentium 4 Willamette 1500 Specifications
Processor Family Model Name Intel Pentium 4 Willamette
Performance Rating 1500 MHz
Front-side Bus Speed 400 QDR (4 × 100 MHz)
Multiplier Ratio 15.0×
Physical Design Interface Packing 423-Pin PGA
478-Pin PGA
Core Voltage 1.7 – 1.75 volts
Power Consumption 57.9 watts
Maximum Power 79 watts
Table 6-125: Pentium 4 Willamette 1500 Overclocking
Pentium 4 Willamette Model Rating 1500 MHz
Overclocking Potential Multiplier Lock Support Locked Multiplier
Typical Multiplier O/C N/A
Typical Front-side Bus O/C 440 – 480 QDR
(110 – 120 MHz)
Typical O/C Potential 1650 – 1800 MHz
Maximum O/C Potential 2000+ MHz
Overclocking
Tolerances Recommended Cooling Type Forced-Air Heatsink Recommended Heatsink Coolers Zalman CNPS-5000
Swiftech MCX-478
Maximum Core Voltage2.1 volts with Extreme Cooling Maximum I/O Voltage 3.5 volts with Chipset Cooler Maximum Core Temperature 72° Celsius
Strategy
The Willamette 1500 MHz was the best-selling Intel processor in the early months of the P4 marketing initiative, due to its impressive performance-to-price ratio. Most
units in this speed grade can attain stable overclocks exceeding 1700 MHz with installation of a decent heatsink cooler and a slight core voltage increase. As the P4 1500 design imposes a relatively low thermal limit of 72° Celsius, any attempts at overclocking beyond 1900 MHz should include high-quality forced-air heatsink cooling.
Pentium 4 Willamette 1600
Table 6-126: Pentium 4 Willamette 1600 Specifications
Processor Family Model Name Intel Pentium 4 Willamette
Performance Rating 1600 MHz
Front-side Bus Speed 400 QDR (4 × 100 MHz)
Multiplier Ratio 16.0×
Physical Design Interface Packing 423-Pin PGA
478-Pin PGA
Core Voltage 1.7 – 1.75 volts
Power Consumption 61 watts
Maximum Power 83 watts
Table 6-127: Pentium 4 Willamette 1600 Overclocking
Pentium 4 Willamette Model Rating 1600 MHz
Overclocking Potential Multiplier Lock Support Locked Multiplier
Typical Multiplier O/C N/A
Typical Front-side Bus O/C 440 – 480 QDR
(110 – 120 MHz)
Typical O/C Potential 1760 – 1920 MHz
Maximum O/C Potential 2100+ MHz
Overclocking
Tolerances Recommended Cooling Type Forced-Air Heatsink Recommended Heatsink Coolers Zalman CNPS-5000
Swiftech MCX-478
Maximum Core Voltage
2.1 volts with Extreme Cooling
Maximum I/O Voltage 3.5 volts with Chipset Cooler Maximum Core Temperature 75° Celsius
Strategy
The Pentium 4 Willamette 1600-MHz processor offers great overclocking potential with minimal concern for system instability. Nearly all P4 1600 models can reach 1900 MHz straight from the retail box, without any significant increases in core
voltage rates. However, cooling becomes a dominant concern beyond 2000 MHz, as this chip features a maximum core temperature threshold of 75° Celsius.
Pentium 4 Willamette 1700
Table 6-128: Pentium 4 Willamette 1700 Specifications
Processor Family Model Name Intel Pentium 4 Willamette
Performance Rating 1700 MHz
Front-side Bus Speed 400 QDR (4 × 100 MHz)
Multiplier Ratio 17.0×
Physical Design Interface Packing 423-Pin PGA
478-Pin PGA
Core Voltage 1.7 – 1.75 volts
Power Consumption 64 watts
Maximum Power 87 watts
Table 6-129: Pentium 4 Willamette 1700 Overclocking
Pentium 4 Willamette Model Rating 1700 MHz
Overclocking Potential Multiplier Lock Support Locked Multiplier
Typical Multiplier O/C N/A
Typical Front-side Bus O/C 440 – 480 QDR
(110 – 120 MHz)
Typical O/C Potential 1870 – 2040 MHz
Maximum O/C Potential 2100+ MHz
Overclocking
Tolerances Recommended Cooling Type Forced-Air Heatsink
Recommended Heatsink
Coolers Zalman CNPS-5000
Swiftech MCX-478
Maximum Core Voltage
2.1 volts with Extreme Cooling
Maximum I/O Voltage 3.5 volts with Chipset Cooler Maximum Core Temperature 76° Celsius
Strategy
The Pentium 4 Willamette 1700-MHz processor is well respected in the overclocking community. The internal 17× multiplier is well suited to operation with processor speeds in excess of 120 MHz (480 QDR). Given a quality cooling solution, most P4 1700 units should scale up to 2100 MHz with minimal fuss and no major concerns.
Pentium 4 Willamette 1800
Table 6-130: Pentium 4 Willamette 1800 Specifications
Processor Family Model Name Intel Pentium 4 Willamette
Performance Rating 1800 MHz
Front-side Bus Speed 400 QDR (4 × 100 MHz)
Multiplier Ratio 18.0×
Physical Design Interface Packing 423-Pin PGA
478-Pin PGA
Core Voltage 1.7 – 1.75 volts
Power Consumption 66.7 watts
Maximum Power 88 watts
Table 6-131: Pentium 4 Willamette 1800 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 440 – 460 QDR
(110 – 115 MHz)
Typical O/C Potential 1980 – 2070 MHz
Maximum O/C Potential 2100+ MHz
Overclocking
Tolerances Recommended Cooling Type Forced-Air Heatsink
Recommended Heatsink
Coolers Zalman CNPS-5000
Swiftech MCX-478
Maximum Core Voltage2.1 volts with Extreme Cooling Maximum I/O Voltage 3.5 volts with Chipset Cooler Maximum Core Temperature 77° Celsius
Strategy
The Pentium 4 Willamette 1800-MHz processor offers a good balance in its 18× core- to-processor bus multiplier ratio. Overclocking returns approaching 2100 MHz should be realized with minimal effort. However, the P4 1800 represents a transition phase in the Willamette architecture for overclocking enthusiasts; models featuring higher multipliers will offer less performance return, due to restrictions in processor bus speeds. The P4 1800 displays evidence of this shift when speed grades of the Willamette design are closely compared.
Pentium 4 Willamette 1900
Table 6-132: Pentium 4 Willamette 1900 Specifications
Processor Family Model Name Intel Pentium 4 Willamette
Performance Rating 1900 MHz
Front-side Bus Speed 400 QDR (4 × 100 MHz)
Multiplier Ratio 19.0×
Physical Design Interface Packing 423-Pin PGA
478-Pin PGA
Core Voltage 1.7 – 1.75 volts
Power Consumption 72.8 watts
Maximum Power 92 watts
Table 6-133: Pentium 4 Willamette 1900 Overclocking
Pentium 4 Willamette Model Rating 1900 MHz
Overclocking Potential Multiplier Lock Support Locked Multiplier
Typical Multiplier O/C N/A
Typical Front-side Bus O/C 440 – 460 QDR
(110 – 115 MHz)
Typical O/C Potential 2090 – 2185 MHz
Maximum O/C Potential 2200+ MHz
Overclocking
Tolerances Recommended Cooling Type Forced-Air Heatsink Recommended Heatsink Coolers Zalman CNPS-5000
Swiftech MCX-478
Maximum Core Voltage2.1 volts with Extreme Cooling Maximum I/O Voltage 3.5 volts with Chipset Cooler
Table 6-133: Pentium 4 Willamette 1900 Overclocking
Pentium 4 Willamette Model Rating 1900 MHz
Maximum Core Temperature 73° Celsius
Strategy
The Pentium 4 Willamette 1900-MHz processor will offer moderate scalability upwards to the 2100 to 2200 MHz range for most system configurations. The .18- micron design of this chip stifles successful overclocking beyond 2200 MHz, regardless of the cooling or voltage levels involved.
Pentium 4 Willamette 2000
Table 6-134: Pentium 4 Willamette 2000 Specifications
Processor Family Model Name Intel Pentium 4 Willamette
Performance Rating 2000 MHz
Front-side Bus Speed 400 QDR (4 × 100 MHz)
Multiplier Ratio 20.0×
Physical Design Interface Packing 423-Pin PGA
478-Pin PGA
Core Voltage 1.70 – 1.75 volts
Power Consumption 71.8 Watts
Maximum Power 96 Watts
Table 6-135: Pentium 4 Willamette 2000 Overclocking
Pentium 4 Willamette Model Rating 2000 MHz
Overclocking Potential Multiplier Lock Support Locked Multiplier
Typical Multiplier O/C N/A
Typical Front-side Bus O/C 420 – 440 QDR
(105 – 110 MHz)
Typical O/C Potential 2100 – 2200 MHz
Maximum O/C Potential 2200+ MHz
Overclocking
Tolerances Recommended Cooling Type Forced-Air Heatsink
Recommended Heatsink
Coolers Zalman CNPS-5000
Table 6-135: Pentium 4 Willamette 2000 Overclocking
Pentium 4 Willamette Model Rating 2000 MHz
Maximum Core Voltage2.1 volts with Extreme Cooling Maximum I/O Voltage 3.5 volts with Chipset Cooler Maximum Core Temperature 74° Celsius
Strategy
The Pentium 4 Willamette family of processors saw its supposedly final incarnation with the release of the P4 2000. This chip offers marginal overclocking capabilities, with most users realizing maximum return in the 2100 to 2200 MHz range. Improved cooling or increases in core voltage will do little to push the Willamette any further; the .18-micron design hinders overclocking beyond 2200 MHz for most traditional system configurations.