If you have the option of setting the cpu fsb in the bios, you can try a manual setting and check the default reading. It will probably be 533 (half of 1066, which is the normal fsb). Try changing this setting to 667, and see if the ram fsb changes with it. The cpu may run fine, but the ram may not want to run faster. If you save and exit, the system may not post, so be sure to locate the CMOS jumper, which is usually near the board battery. You will have to unplug the power supply and move this jumper over one position to reset the bios. Two of the three pins have to be covered by the jumper at all times; then move the jumper back to it's original position. If all this sounds too complicated, then I would leave your system alone. If it ain't broke, don't kill it.