D400 models (in terms of CPU)

Hello,

 

Does anybody know if Dell has made any pre Centrino D400 Notebooks?

 

By pre Centrino I mean systems having not the Pentium Mobile but rather the Pentium 4 Mobile CPU. Is there any D400's with the P4M CPU?

 

I am asking because I was looking for a D400 on eBay and to my surprise I found that some of the offers specify the CPU as being a P4M. Is that possible?

 

Actually, I'd prefer the Pentium Mobile, because it is more energy efficient.

 

Then I've also seen offers for D400s specifying the CPU as 1.8 or even 2 GHz Pentium Mobile.

 

At some other place I have read that the fastest Pentium Mobile CPU in a D400 notebook has 1.7 GHz. That might mean that a 2 GHz D400 has a P4M CPU and not a Pentium Mobile?

 

Does any of you know what is correct and what is not?