Why on the video cards in attendance is ddr,ddr2,ddr3 which one these my notebook can pinch?

my strike is ddr 400 if that helps

Why on the video cards in attendance is ddr,ddr2,ddr3 which one these my notebook can pinch?

video cards own their own memory independent what your system has, so that's nil to worry something like. just bring in sure you get a card next to the correct connector(AGP,PCI-E,PCI)