If you overclock, the non-intel motherboards with the 845E and 845G chipsets. Also the SiS 645 should support if you overclock, it might even if you don't. The SiS 648 'officially' supports it. Also, this one i don't recommend, the Via P4X400 should support it. Some good motherboards to check out are the Abit SR7-8X, Gigabyte 8IGX, 8IEXP, the Asus P4B533-E, P4B533-V, P4S-8X(this isn't out yet), and the Soyo P4S-648 DRAGON Ultra which also isn't out yet. I have also heard good things about MSI and EPoX. Usually it's personal preferance and what you want in the motherboard.