Which RAM should I get?

[ShawnHeather88]

Gonna have a total of 2gig if its 1 stick or 2 it dont matter. dont wanna spend ofer 80$. I have the VGN-NR120E Sony Vaio.(the ram in it is pc 4200) don know if I have to stay with 4200 only pc ram?

http://www.newegg.com/Product/Product.aspx?Item=N82E16820145593

http://www.newegg.com/Product/Product.aspx?Item=N82E16820146517


http://www.newegg.com/Product/Product.aspx?Item=N82E16820231135

these are some ii found but what could e better?
want the fastest RAM I can get with 80$

 

[ShawnHeather88]

I already read the ram101 didnt help my questions? so please let me know

 

[Cromewell]

You should be OK installing faster RAM but PC4200 may be the fastest it can run it.

 

[ShawnHeather88]

You should be OK installing faster RAM but PC4200 may be the fastest it can run it.

so i cant go any faster then pc4200? thanks for your help.