According to the abit website this board only supports up to 700mhz with the latest bios. On the other hand when i am in the bios i can choose 8.5x multiplier at 100mhz bus speed. I currently have a 366 celeron and want to upgrade to the highest 100mhz fsb processor which is the 850. If anyone has had any experience with this board and processor or have any info it would be much appreciated. I just don't want to end up buying the 850 and then find it doesn't work.