Increasing memory in my macbook

[Killa_ken]

OK, so my macbook I brought like 2 months ago and it has 1gb of ram with the 2.16 ghz processor. I have a single stick on DDRII 1gb memory, will this fit my macbook or is the current config a 2 x 512 party?

 

[Killa_ken]

You are correct, both slots are indeed filled. Would there be much point in adding an extra 512 then? Would 1.5gb make any change?

 

[Killa_ken]

I dont have the Ram stick yet, i've been offered it for $20 which to me, seems a good deal?