Guys, I want to buy a laptop and see that there are two different processors. Intel Pentium 4 and Intel Centrino Mobile.

P4 has about 3 gigihertz and Centrino has only 1,5 gigahertz..
Can someone tell me the difference?

Thanks a lot

...Rick

do u have other specifics on the laptops?
i would go for the p4 3.0 ghz,

Pentium 4 or Pentium 4M (P4 Mobile)?
If there is P4 only so you should choose the Centrino Mobile notebook. Otherwise it depends on prices and the need of WIFI and Bluetooth cards and other built accesories (DVD write, floppy dirver etc.)
The P4M notebooks usually are more heavy, than Centrino notebooks.

Hope this help

----------------------------------------
Quote from technical whitepapers:
The Pentium 4 is a desktop processor. From this CPU design there have been made 3 different mobile CPUs...:
The Mobile Pentium 4 (high performance, also with hyper-threading), the Pentium 4-M (optimized for notebooks with SpeedStep) and the Mobile Celeron (a cheap version).

The Pentium M is a whole new CPU design (not just optimized for notebooks, designed for notebooks. More performance per colck cycle, and even better power handling with an enhanced version of SpeedStep). The Celeron M is a cheap version of the Pentium M.

There are two (three with the Celeron) versions of P4 mobile CPUs.
The Pentium M (not to be confused with Pentium 4-M) is a completely new design.
The Celeron M and the Mobile Celeron have only the name in common; their design is completely different.

As AMD and Apple have been trying to tell for years, megahertz and gigahertz are not the best way to compare CPUs. In fact a Pentium M 1.7 GHz outperforms a Pentium 4-M 2.6 GHz (according to Intel).

For a notebook to carry the Centrino tag three conditions must be met: Pentium M CPU a Intel 855 chipset and certain wireless cards. There is no processor with the name Centrino.

Centrino notebooks
----------------------
Pros:
1 . You get longer battery life
2. Built-in WIFI and Bluetooth cards
3. Not as heavy as P4 notebooks (P4 and P4-M)
4. Less heat
5. More cache on CPU

Cons (if the price is same as the price of P4, P4-M):
1. Usually come with smaller LCD screen
2. Drivers as CD/DVD Writers or Floppy drivers may not built-in and need to purchase separately
3. Less I/O ports

You can check more about Centrino here:

http://www.powernotebooks.com/centrino.php

Ok, Let me explain some things

Pentium4 chips are mainly tower processors, They are world renoun for a few things notibly giving off heat
Centrino is specificly desiogned for portables, so it has less heat, but also a tiny bit less power, as it's optimized, less ghz but same power

And Centrino also has Wifi built in, Wifi is wireless connections, so if you 2 pcs with wifi they can both communicate withought wires

Hope that helped, I've got a centrino in my laptop