hi, that's one question i would like to ask.

currently, my dekstop is using 1 512mb ddr2 ram (533mhz), corsair.

i m thinking of upgrade it by either adding one 512 mb or one 1g ram. the problem is, if i add one 1 g ram, it will only add up the capacity and not much on the speed, am i right??since i can't use dual channel, i can only use single channel with total capacity of 1.5g.

if i add 1 more 512mb ram to channel b (3rd slot), then i can use dual channel effect of the ram, theoretically it will boost up the speed more than the previous 1.5g option. am i right???

if the above situations are true, then which option should i take?? add 512 or 1g?? i m cracking my head....!!!ahhhh!!!:wacko:

1 more thing is, let say if i add 1 more 512mb, then should it be the same brand and same model as my previous one?? or it will do even the brand is different but the speed and the capacity are the same??

thanks...

then should i buy a same brand and same model ram or jz any brand, as long as it is 512mb 533mhz??