Shoutbox

I'm planning to put more RAM in my comp so i just wanted to make sure i was getting the rigth thing. The mobo i have is an Asus A7N8X - which has 3 RAM slots - and right now i this for RAM: DDR Corsair 512MB (2*256) 400fsb Cas2 TWINX. Now i was wondering if i added this: DDR Corsair 512MB 400fsb Cas2 if it would all work well (even if it isn't TwinX). Thank for the help