Yes, almost every PSU has enough power to supply a P4 CPU. It depends on the total load, not only on the CPU.
The Intel Pentium M is a type of processor that is used in laptops. The M stands for mobile and the Pentium M is designed to use less power and generate less heat than a processor used in a desktop.
Intel Pentium processor
There were a few laptops that used Pentium 4s. However, Pentium 4s generated too much heat and drew too much power for them to be practical.
Officially, Windows XP requires a minimum of a 233 MHZ Pentium processor. Unofficially, with a minor patch or via hard drive swapping, any Pentium processor can be used.
Pentium MMX and AMD K6 both use dual voltage. The lower supply voltage is used for the core and the higher voltage is used to power the I/O pins.
Socket 478
The Latitude D610 uses an Intel Pentium M processor, and the highest speed Pentium M Processor that is officially supported by the D610 published specifications is the Pentium M Processor 770 (2.13GHz) I know of reports of the Pentium M Processor 780 (2.26Ghz) being used, but I have not personally verified these. As of my last check with Dell directly, the 770 was the highest processor officially supported. An unsupported processor means no real assistance from Dell if you're having problems.
The Intel Pentium line encompasses many processors of many different architectures ranging from the original Pentium Processor of 1994 up to the Core 2 Duo based Pentium simply called the "Pentium". The Intel Pentium used to be Intel's flagship processor. Recently this position has been taken by the Core 2 Duo and Core i7. The Pentium now is reduced to a budget processor that offers lower performance but also lower cost.
SSE was first used with the Intel Pentium 3 III.
Depends on what type of server, it most earlier servers (Pentium 2/3 days) The most common Slot 1/2 Processor used was the XEON by Intel. It covered Pentium 2 and Pentium 3 servers, the XEON Processor wasn't like a normal PC version, it featured a larger Cache which would help the processor process more and at a faster rate.
"M" stands for Mobile, usually Pentium M processors are used in Laptops (like mine). Please see link for additional detail.
Socket(s)Slot 1MMC-1MMC-2Mini-Cartridge