How do you know that you have a 333Mhz version? Is this one of the pre-mass production boards with the low voltage, and missing daughter card connector?
I received mine today and the print out that came with it says that it is a 266 Mhz board. Upon reading the manual, I see that you can change the clock rate in the bios. I am looking into this right now. I will be doing some wireless, and ethernet tests. I will post the results when I am finished.