Why buy a "Mobile" version of a cpu?

[techs]

I see that they are advertising mobile versions of the Athlon and P4. What is the difference between a regular and a mobile? Do both fit into the same socket(socket A or 478)? Do the mobile chips run cooler?

[delmer_1]

now i very easily could be wrong, but i always thought that the mobile CPUs were for laptops...that is why they are called mobile

[emr]

That would be my take on the situation delmer.

[Archer]

From my understanding of the articles that I have read so far the mobile processors have an auto stepdown function built in.
In that they do not run at the full processor speed all the time unless the load requires it,thus cooller running than a standard processor would and extending battery life in the process.
There was an article written in a UK publication I have mentioned before in which some notebook producers were using standard CPUs instead of mobile items because of cost cutting and the review stated because of the overheating[compared with a mobile model] great concern was given to the expected life span of the other parts of the notebook.
Intel were said to be a little miffed at the manufacturers for using standard processors instead of the mobile types.

[+Daemon+]

mobile cpu's are for laptops and use less power due to the power comsumption in laptops. Thats all. You dont use mobile cpu's in a non laptop/notebook environment

[Carlitos_Way]

Although there are some laptops with desktop CPUs.

[Platypus]

The design operating temperatures for mobile CPUs are usually higher too, ie the temps for stable operation & maximum permissible are more generous.

[confus-ed]

...mobile chips cost twice as much as the regular version !! , they are often soldered on but they do use the standard sockets...

[techs]

AMD MOBILE Athlon XP 1900+ /1.6GHz 200MHz FSB 256K, AXMD1900FVQ3B

Saw this at Newegg. Socket A? Is this to replace a laptop cpu? Looks like it is for a desktop.