Quote Originally Posted by ReverendMaynard View Post
Who says? They most certainly can be used together and if they don't work together RMA the board.
the info i posted came from Asus. they did mention they tried to fix it during one of the bios updates but if your problem persists to disable one of them.

i dont use SpeedStep so i dont know what the actual issue is, but i do use C1E without any problems.