hi everyone, i have a mobo that supports 4gb ram. i currently have a jet transcend 512mb 533mhz ram. i want to add another 512 ram stick........but the exact same ram is not available.....there is a ram by dynaset which is of 533mhz.....but the problem here is "dynaset"............. else another ram by jet transcend 512mb 667 mhz is available.........which one should i go for......? is the speed of the ram necessary to be equal? i.e. 533 mhz. will there be ant conflicts and slow system performance if i go for transcend 667mhz ram?????? please reply fast as i plan to buy tommorow.......thank you.