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Processor Family |
Model Name |
Intel Pentium II Klamath |
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Performance Rating |
266 MHz |
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Generation |
Sixth: 80686 IA-32 |
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Operational Rates |
Level 1 Cache Speed |
1.0× Core Rate |
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Level 2 Cache Speed |
0.5× Core Rate |
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Front-side Bus Speed |
66 MHz |
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Multiplier Ratio |
4.0× |
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Physical Design |
Interface Packing |
242-Pin Slot 1 Cartridge |
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Core Die Size |
.28 micron, 203 mm2 |
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Transistor Count |
7.5 Million |
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Voltage Interface |
Split Core and I/O |
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Core Voltage |
2.8 volts |
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Power Consumption |
25 watts |
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Maximum Power |
38.2 watts |
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Pentium II Klamath |
Model Rating |
266 MHz |
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Overclocking Potential |
Multiplier Lock Support |
Unlocked Multiplier |
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Typical Multiplier O/C |
Up to 4.5× |
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Typical Front-side Bus O/C |
Up to 75 MHz |
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Typical O/C Potential |
300 – 333 MHz |
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Maximum O/C Potential |
333 – 350 MHz |
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Overclocking Tolerances |
Recommended Cooling Type |
Forced-Air Heatsink |
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Recommended Heatsink Coolers |
Globalwin VEK 16 |
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Vantec PIID-4535H |
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Recommended Peltier Active Cooler |
STEP-UP-53X2 |
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Maximum Core Voltage |
3.0 volts with Heatsink Cooler |
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Maximum I/O Voltage |
3.5 volts with Chipset Cooler |
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Maximum Core Temperature |
73° Celsius |
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The Pentium II Klamath 266 offers overclocking capabilities similar to those of the 233. As the family's second generation, the 266 offers overclocking potential upwards of 350 MHz. Any additional gains are probably attributable to variations in the Level 2 cache memory chips. Intel used various brands and types of these chips in its Klamath series.
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