I have a Dell Dimension 8200, Pentium4, 1.9 GHz. It has 2-128 MB PC800 RDRAM modules. I do not know the FSB MHz or if it is 40 or 45 ns. I wanted to add more RAM to the two empty slots. Dell Tech Support tells me I can only fill the two empty slots with 128 MB modules. If I go with larger modules (2-512 MB), I must remove the 128 MB. Is this true? What do you recommend I do to upgrade the RAM? Two-512 MB of RDRAM will cost >$500, is this upgrade worth the money? Should I look into a new computer? This one is four years old? Thanks for any thoughts on this.