off the top of my head, no. .. rd ram cannot be put in ddr slots.
dont quote me on that though.
Anyways, i wouldnt go as far as saying RD ram is better than DDR, simply because it is less stable than DDR, and it costs alot more for little performance gain.
muradtalukdar, your motherboard must be able to support pc2700 ddr ram, if you want you can post your motherboard name and type and ill have a look for ya,
or if you want, you can goto google.com and search for "(motherboard type) specs"
.. hope this helps.