i planned on getting an athlon xp64 3200+, and also wanted to put some ddr2 533mhz RAM. for some reason i can't find a board with ddr2 for athlon sockets, only intels, i'm confused...
AMD does not plan to adopt DDR2 (if at all) until late 2005.
DDR2 is only part of the transition to DDR3. DDR2 is better for power and heat but it takes the Intel way at making things better. It allows for higher clock speeds but it has a higher latency which makes DDR400 faster than DDR2533 a lot of times.
Until DDR2 667, DDR will still be faster.
If you know how to OC, they actually have memory rated at DDR 600 right now but boards don't consider it a standard.