hey i have rdram.. stop the laughing, already... anyway i know you can't have any empty slots when it comes to rdram but can you have ram sticks of different sizes? like one's 64 mb. and the other's 256?

why would anyone laugh? rdram is superior to all other ram. you pay for
it $ though. you need to check the website of your motherboard maker.
i have an i820 board and it does not have to have rdram installed in pairs
and they can be different sized. dual channel rdram needs to be installed
in pairs generally. usually the same size is required. cheers.