Need advice on upgrading laptop ram

[mcna]

I want to upgrade my toshbia eqiuim A110-252, it currently has 512 of DDR2 RAM (533 MHz).
does it matter if i get ram of a different size and or speed. could this slow down the system?

if i get ram of 667 mhz would it slow this ram to 533 to match the other?

is there any ram which is reccomended for my notebook?

Thx Mcna

 

[Alex Ethridge]

Go to www.crucial.com and they can match your RAM to your computer.

The computer will slow RAM speed to the speed of the slowest chip. Aside from that, no difference.

 

[mcna]

Thx very much

Mcna