Re: dell ram
If it uses RDRAM, I'd say save your money for a new system. RDRAM is expensive, besides I don't even think it's used in home computers today or if it is it's impossible to find one that uses it. Save your money and build a new system with DDR2 which is very reasonably priced. You could buy a refurbished system with DDR that you can upgrade, for the price of RDRAM.
Desktop: Dell Dimension E510, 2.5GB RAM, Intel P4 3.0GHZ, 250GB HDD, Windows Vista Premium. Might not be the best, but the old girl is still running good.