Dell 8200 with RDRAM

[kippjr]

i just got my hands on a dell 8200 with rdram it had 256 but i add another 256 i had to put a hard drive an cd rom in it an it came with windows xp an 2.oo ghz processeri got it working an put a os on it with my restore disk an it runs really good but im wondering if i can put a bigger p 4 in it i dont know alot about comps with rdram in them but i am assumeing i can put any kinda p 4 in it but i would like to know more about this if anybody has info about it... each 256 is actually 2 128 sticks