Pros

• Great performance
• Great price

Cons

• 4GB won’t show up unless you have 64-bit OS

Verdict
In the end even though I don’t have a 64-bit OS I am very glad that I have the maximum amount of RAM I can get in my machine. I can work and open new windows and applications without worrying about system lockups or crashes from running out of RAM. The Crucial 4GB DDR2 PC2-6400 RAM kit performs very well and is absolutely stabile for daily use. This is an excellent RAM kit for Vista notebook users.