Roazarie, I have DDR2 Memory in my system. If your computer runs on an Intel Pentium D or Pentium 4 processor and can support 1024 MB 800 MHz RAM, these will work for you.
Freeme1983 That may not be true, Different motherboards require different types of ram, some run DDR, DDR2, DDR3 SD RD etc etc etc, just because they all run P4 doesn't mean they run the same P4 socket or ram. It is best to consult the PC maker, or your user manual to find out what RAM your computer can use.
Mine uses PC 3200 not this PC 6400 and I have a P4 3.0Ghz chip...