How do I determine what kind of memory that I...

Question

I need to know how to determine what kind of memory to buy.

How do I determine whether to use high density or low density memory?

What is the advantage to low density memory?

Are external bus speed, FBS, and/or memory speed the same?

I ask because my laptop external bus speed is 400 MHz but the memory calls for either 200 or 266 MHz memory but I don’t know if they are talking about high or low density memory.

Thank you for your help.

Don Jones