Thats because it doesn't have legacy support. Like Ps2 and serial ports. So its USB or nothing for one. I forget what it is right off the bat but something about one of the onboard peripherals is not supported by 98SE. But its just that board. Personally its the neatest but clearly most over featured board right now. I think it was a mistake to cut out supprot for PS2 and serial ports. And the price on that board has been steadily dropping as well because of it.