The Mobile Intel Pentium 4 Processor was released to address the problem of putting a full Pentium 4 desktop chip into a laptop, which some manufacturers were doing. The Mobile P4 still used 70 W of power, which let it bridge the gap between the full Pentium 4 (using about 82 W), and the Mobile Pentium 4 M (using about 35 W).
Mobile Pentium 4 M:
Also based on the Northwood core, the Mobile Intel Pentium 4 Processor - M was released on April 23, 2002 and included Intel's SpeedStep and Deeper Sleep technologies, and Hyper-Threading in some models. Intel's naming conventions made it difficult at the time of the processor's release to identify the processor model.There was the Pentium III mobile chip (or the PIII-M), the Mobile Pentium 4 M (or the P4-M), the Mobile Pentium 4 (or the Mobile P4), and then just the Pentium M which itself was based on the Pentium III. Its TDP is about 35 Watts in most applications. This lowered power consumption was due to lowered core voltage, and other features mentioned previously.
Mobile Pentium 4 M:
Also based on the Northwood core, the Mobile Intel Pentium 4 Processor - M was released on April 23, 2002 and included Intel's SpeedStep and Deeper Sleep technologies, and Hyper-Threading in some models. Intel's naming conventions made it difficult at the time of the processor's release to identify the processor model.There was the Pentium III mobile chip (or the PIII-M), the Mobile Pentium 4 M (or the P4-M), the Mobile Pentium 4 (or the Mobile P4), and then just the Pentium M which itself was based on the Pentium III. Its TDP is about 35 Watts in most applications. This lowered power consumption was due to lowered core voltage, and other features mentioned previously.