Your FSB multiplied by your processor's multiplier gets you your CPU frequency. In your case, that would be 266 * 7, for 1.862 GHz.
The rated FSB is the number of transfers per second possible on your FSB, which is four times your FSB frequency because it is quad pumped (handles four transfers per clock cycle). In your case, this is 266 * 4, or 1064. This measurement is in MT/s, or megatransfers per second.
Thank you that makes sense to me now. So since my cpu should be 266*7 but my bus speed is only 266*4 can i not change my bus speed to fit my cpu or am i maxed out as far as my cpu speed ? so i shouldnt bother upgrading my cpu to a higher GHz