i currently have 2x250mb DDR 333mhz memory in my laptop. the video card isnt great not to sure on the specs but i have been told by several techs to get a memory upgrade to 1GB which is what im going to do. I am new to upgrading memory so dont know much about it im wondering if i get a 1GB 400mhz chip if it would make compatibility diffence since i have 333mhz now. Also wondering if a DDR2 upgrade is possible for me since i only have DDR right now and is DDR2 really that worth it? thank for your info.