Make sure your FSB(FrontSide Bus, aka 'CPU External clock'
is set to 166MHz
both in BIOS and via jumper on your motherboard - refer to your manual for details(i.e. location and correct settings for the jumper).
Right now, your FSB is running at 133MHz which results in a clockspeed of 1.33GHz(133x10.0) instead of 1.66GHz(166x10.0).
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