Intel Mobile Pentium 4-M microprocessor

Mobile Pentium 4-M microprocessors are based on the same NetBurst microarchitecture as the desktop Pentium 4s. They have the same features as Pentium 4 desktop processors with Northwood core - 0.13 micron technology process, 400 MHz bus speed and 512 KB level 2 cache. These mobile processors have lower power dissipation than the desktop processors due to lower core voltage and additional power-saving features. The first feature is a SpeedStep technology. When necessary (for example, if the microprocessor operates on battery power) the processor can reduce power consumption by reducing the core voltage to 1.2V and throttle the processor speed to 1.2 GHz. Power savings in this mode are minor for 1.4 GHz processors, but they increase significantly with the increase of the processor speed. Power consumption of Pentium 4-M 2.6 GHz is reduced almost in half when it switched to SpeedStep mode. Another new feature is a Deeper Sleep mode, which is not present in desktop processors. This mode is similar to Deep Sleep mode, but the processor operates at 1.0V as opposed to 1.2 or 1.3V for Deep Sleep mode. Power consumption in this mode is reduced to approximately 3 Watt.

Pentium 4-M processors are manufactured in 478-pin FC-mPGA package. Unlike the FC-mPGA2 package of desktop Pentium 4 microprocessors, the FC-mPGA package doesn't have integrated heatsink. The Pentium 4-Ms fit into the same socket 478 as desktop Pentium 4 CPUs, though Intel does not recommend using Pentium 4-M processors in desktop systems due to processors' lower core voltage of the processors and different package design.

To compare major features of different Mobile Pentium 4-M CPUs please see a chart of Intel Pentium 4-M microprocessors.