ASUS K7V MB

I have been trying to get information about the ASUS K7V motherboard and the dimm chips usable on this board. Every time that I find a decent price for a 256mb dimm, it reads not compatible with the K7V. However, the asus specs indicate usability up to 512mb dimms. Any help on why the 256mb dimms would list not usable on the K7V???

Any help would be appreciated.

Gene