RADEON DDR vs. RADEON DDR VIVO

[Kobe08]

I am looking to upgrade my old Voodoo 3 2000 Card to a Radeon DDR. My Voodoo simply lags, and Im tired of it slowing down and skipping when I play any simple games(like AOE). I've heard that the DDR is a pretty good card, but I can't seem to find any info that will tell me the major differences between DDR and the DDR VIVO ( or is it the same card?). The VIVO is listed for a higher price- but really, why one over the other- and where can you get one( VIVO ) ???
I hope someone can help me. Oh, and no, Im not looking into getting a GEFORCE.