You want the Precessor set to a 133 fsb with a multiplier of 15.
The settings will be in the voltages/ frequency part in your bios.
The fsb is set to 133 because it is a 266 (133 * 2) bus.
To give a processor speed of 2000 mhz. Do not pay attention to the max clock speed. It is basically just taking the value of 133 and multiplying it by your largest multiplier available on your motherboard.
if the above doesnt solve the problem then have a look in your motherboards manual for a manual jumper setting for the fsb. I have an xp2100 which was reported as a 1500 on first starting up. this was because of a jumper on the MB that was set to 100 (default).
I have An AMD 2600XP and Sandra, system imfo and Belerac all tell me I have 2100. I assumed The 2600XP rating was only a designation or defintion.Is it possible that I am running at a lower speed. If this is true. How do you reset the jumper on the FSB? tufnut.