You can use motherboards with i850e, i845e, i845g, or the i845gl motherboards if you want to use Intel chipsets due to the newer processors running at 533 Mhz bus speed. The sis645dx chipset and via p4x333 chipset will also work(whenever this motherboard is released). The i845g motherboards are supposed to have "unofficially" DDR333 and the i850e is supposed to unofficially have "PC1066" rdram support if you buy a vendor's motherboard(Asus or Iwill).