k im sorta new to all this advance computer stuff but i wanna put more ram on my computer. . One slot is filled with a 256 mb PC3200 400 mhz DDR ram, and i have 3 more open slots for ram. Is it ok if i put in my old computers ram in one of the slots?? .. o and i have no idea what type the old computers ram is but im pretty sure its 256 mb. Will it work without messing up my computer?- or do they have to be the exact same?