only frequency and type of memory.You can add different merory size RAMphuchungbhutia said:need to ask whether the memory size has to be same or only the frequency
bajaj151 said:I wud suggest u to sale out ur present 256mb@333mhz.... and go for single 512mb@400mhz.
casanova said:U r having only a 256MB 333MHz RAM Stick. You do better exchange it for a 512MB stick of atleast 533MHz. You wont regret it
casanova said:Nah, I meant what I said. 533MHz as I said to exchange it and not to add it.