what ram set up should i do

[isaacual69]

i have an extra 256 chip floating around and am wondering if i should add it to my systme. i know its the right type, but i alrady have 512mb of duel chanel pc2700, will it be better if i leave it alone or add 256 giving my systme 768 but in single channel

 

[Mac OS X]

I say leave it alone