it seems not atm.
the Asus P5H DH has 1067mhz settings in the bios (after an update) but from what ive researched no1 can reach them (even with PC1066 ram), most ppl can max out at about 900mhz before getting crashes/bsod/errors.
as for an update, i have no idea..... seems weird that the chipset cant support it if u ask me.
Edit: Sorry im tired & stressed, just relised this post says absolutely nothing beneficial to this thread lol