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4x4: A Comparison of Four Mobile Pentium 4-M Processors

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2. Compared: 1.4, 1.7, 1.8 And 2.2 GHz Mobile Pentium 4-M Vs. Desktop CPU

The table gives an overview of the mobile Pentium 4-M CPUs we tested and the corresponding desktop processors.

µ-FCPGA and FCPGA: Typical Pentium 4-M CPU and a desktop P4 with heat spreader.
sSpec Number SL5ZW SL5ZZ SL69D SL66Q SL6LR SL6S8
Processor Frequency 1.40 GHz-M 1.70 GHz-M 1.80 GHz-M 1.80A GHz 2.20 GHz-M 2.20 GHz
Package Type Micro-FCPGA Micro-FCPGA Micro-FCPGA FC-PGA2 478-pin Micro-FCPGA FC-PGA2 478-pin
Bus Speed 400 MHz 400 MHz 400 MHz 400 MHz 400 MHz 400 MHz
Core Stepping B0 B0 B0 B0 C1 C1
L2 Cache Size 512K 512K 512K 512K 512K 512K
L2 Cache Speed 1.40 GHz 1.70 GHz 1.80 GHz 1.80 GHz 2.20 GHz 2.20 GHz
Bus/Core Ratio 14.0 17.0 18.0 18.0 22.0 22.0
CPUID String 0F24h 0F24h 0F24h 0F24h 0F27h 0F27h
Core Voltage 1.3V/1.2V 1.3V/1.2V 1.3V/1.2V 1.5V 1.3V/1.2V 1.525V
Thermal Design Power 25.8W/20.8W 30.0W/20.8W 30.0W/20.8W 49.6W 30.0W/20.8W 57.1W
Max Junction Temp 100°C 100°C 100°C 67°C 100°C 70°C
Die Size 0.13 micron 0.13 micron 0.13 micron 0.13 micron 0.13 micron 0.13 micron
ECC/non-ECC ECC ECC ECC ECC ECC ECC

As can be seen from the technical specifications, the mobile P4-M processors we tested were all derived from the desktop CPU with a Northwood core. They have a 512 kB L2 cache and are manufactured using the 0.13-micrometer production process. Some people are probably wondering where the 1.4 and 1.7 GHz Pentium 4 CPUs are to be found in the summary: the Pentium 4 with Northwood core was never offered in these speed variants.

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