upgrade of DDR2
 

hey guys.
I am using two 1GB DDR2 800MHz
I would like to upgrade to 4GBS
CAn i just buy any others brand of 2GB ram and put them all together?
or it's better to buy a seperate 4GB RAM to replace the old one?

Thanks for the comments

Generaly better to buy a kit of 4 G that s designed to run together.
If your going to buy 3 G then I woud buy the whole 4 gigs.
All the memory shoud be the same speed also.

What are you putting the memory into ?