LOL, that's because there is no such thing as 533MHz FSB, all the latest CPU's run with a 133MHz FSB. AMD uses a DDR bus and founded the lie with their so called "200MHz system bus" a long time ago. The marketing gimick was so sucessful that Intel had to follow suit when they released their Quad Data Rate bus, instead of telling you up front it was QDR they lied and called it 533MHz. "QDR533" means 133MHz at four bits per cycle per data connection. not 533 actual megahertz. Same goes for AMD's "266" and Intel's "400" bus. What BIOS and other programs are reporting is the true clock speed, not the QDR rating.
<font color=blue>You're posting in a forum with class. It may be third class, but it's still class!</font color=blue>