My folks have a Dell Dimension XPS T600r PC, circa 1999. It runs an Intel Pentium II processor stock. I have a Pentium IV, 2.20Ghz chip I am not using (came from a fairly new--year old--Dell Dimension 2400 PC). Would this chip A) "Fit" in the Dell XPS T600r (# of pins is the same or not?) and, B) would the XPS work with this newer Intel chip? The XPS runs only 128MB RAM, so that can definately be added to. Thanks!