The pc is a dell xps 420, it can house 4, 2gb ddr2 sticks of ram and I was wondering if this is compatible.
http://www.amazon.co.uk/Komputerbay-800MHz-PC2-6300-PC2-6400-Desktop/dp/B004LT6O56/ref=wl_it_dp_o_pd_nS_nC?ie=UTF8&colid=1PU5C07THQN0C&coliid=I61VN5U9RPEK6
http://www.amazon.co.uk/Komputerbay-800MHz-PC2-6300-PC2-6400-Desktop/dp/B004LT6O56/ref=wl_it_dp_o_pd_nS_nC?ie=UTF8&colid=1PU5C07THQN0C&coliid=I61VN5U9RPEK6