Is any SODIMM compatible with any laptop?

[rjcoolpix880]

I have a dell inspiron 3800 @ 600Mhz and want to upgrade the memory. I need PC100 144-pin SODIMM.

1.Will any kind of SODIMM work? I mean are they company specific toshiba dell etc..
2.They have 256 144-pin SODIMM PC133 at newegg for $36 while at dell they have PC100 for $99. Would that memory work at all and if it did would the memory running at slower speeds be stable?

Please help.

-Thanks

 

[Utterman]

I would imagine running PC133 memory at PC100 speed won't effect it. I have done this with computers since it's usually cheaper to go PC133 and you can use in on a system that uses PC133 later. I doubt that you will run into any problems with the PC133, so you might as well get the PC133.

 

[IgoByte]

You'll be fine with the PC133 sodimms from newegg, unless they are a special height that just simply wouldn't fit. Search the hot deals forum though, because I think that you might be able to get PC100 sodimms even more cheaply than $36. I believe something was recently posted for ~$20.