ASUS boards support ddr400, i have the P4S533
this board supports 133 fsb for the new p4s and 200mhz (ddr400) memory speed, you can oc real easy with this board too, i've got my p41.8a oc'd to 2.4 and did have ddr333 oc'd to ddr400, but had too many errors so i dropped it back to auto settings, btw this board only supports ddr400 on a 133mhz fsb, not the 100 like for a 1.8mhz p4