If you have something better than the standard heatsink, you may be able to run your cpu at about 11.5 multiplier setting x 138 fsb, by raising the cpu core voltage to 1.8. Before trying to overclock, check your cpu temp in the hardware monitor section of the bios (usually at the bottom left of the screen). If your cpu temperature rises more than 5 degrees after overclocking, you may want to back off and reduce your settings. Your cpu temp shouldn't exceed 55 celcius under full load. Your t-bird normally runs at 133 fsb (double pumped=266). Your multiplier, voltage, and fsb settings are all listed in the bios. Read the bios section of your manual.