OT: Fastest Pentium Pro?

[Scarletdown]

What was the fastest Pentium Pro CPU produced?  On one site that a 
Jeeves search turned up, there was mention of the Pro getting up to 
300MHz, yet another search result says that the fastest is 200MHz.

Plus, the HP Vectra XA that I am tinkering with uses a Pentium Pro CPU 
(she currently has a 200), and according to the geeksheet for this 
motherboard (http://www.embeddedlogic.com/TH99/m/E-H/35391.htm) this 
board can take up to a 266.

So, which is it?