I am running on an Athlon XP 2100+ and a MSI KT3 Ultra motherboard - PC2100 DDR ram.

My bios says the FSB is set to 133mhz. Both my processor and motherboard are 266mhz FSB compatible. Is the 266 derived from 133mhz x 2 somewhere - or is my systems fsb currently running at 133mhz and not to its full potential?