This Rome, some sort of RAM, SDRAM in which data, such memory can be stored. Although DDR2 similarities of DDR? like how to transfer data, but the difference there is also. Crossings data ( BUS ) ram, DDR2 compared to the speed of transmission is doubled. The difference to the basic shape, to Rome, DDR2, that allow twice the Ram, DDR performance. Of course, the advantage Ram, DDR2 to DDR in the high-frequency crossings of data it is. Ram, DDR2 number of memory mediation ( Buffer ) also uses that speed fetch ( Fetch ) to two times the speed of fetching Ram, DDR Live( Bit 2 ). Of course, depending on the type of RAM the more expensive and lavishly than the previous kind, it is.